Feliks Rejmund, Ph.D., Dr. Habil.

Department of Experimental Mechanics (ZMD)
retiree
telephone: (+48) 22 826 12 81 ext.: 254
room: 533
e-mail: freymund

Doctoral thesis
1981Związek emisji akustycznej z ruchem dyslokacji w kryształach 
supervisor -- Prof. Szymon Pilecki, Ph.D., Dr. Habil., Eng., IPPT PAN
367 
Habilitation thesis
2000Metody akustyczne badania dynamiki wybranych procesów fizykochemicznych w ośrodkach materialnych 
Recent publications
1.Ranachowski Z., Jóźwiak-Niedźwiedzka D., Ranachowski P., Rejmund F., Dąbrowski M., Kúdela Jr S., Dvorak T., Application of X-ray microtomography and optical microscopy to determine the microstructure of concrete penetrated by carbon dioxide, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, DOI: 10.2478/amm-2014-0245, Vol.59, No.4, pp.1451-1457, 2014
Abstract:

In the paper two advanced methods for testing cement based composites are described and compared. These are X-ray microtomography and optical microscopy. Microtomography supplies three-dimensional images of small concrete specimens. In the tomograms all cracks, pores and other voids and inclusions, that exceed a few micrometers, are shown. Such visualisation can become a valuable tool for analysis of the basic material properties. Images obtained on thin sections and analysed with various methods on optical microscopes supply additional information on material microstructure that cannot be obtained in tomograms. For example it is relatively easy to determine zone penetrated by CO2 ingress. These two methods, presented on examples of tests, complete each another in order to supply a set of information on composition and defects of tested composite materials.

Keywords:

cement matrix composites, concrete deterioration, X-ray tomography, microscopic analysis, concrete microstructure

Affiliations:
Ranachowski Z.-IPPT PAN
Jóźwiak-Niedźwiedzka D.-IPPT PAN
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Dąbrowski M.-IPPT PAN
Kúdela Jr S.-Institute of Materials and Machine Mechanics, Slovak Academy of Sciences (SK)
Dvorak T.-Institute of Materials and Machine Mechanics, Slovak Academy of Sciences (SK)
2.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Kúdela Jr S., Influence of microstructure on the properties of siliceous electrical porcelain, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, DOI: 10.12915/pe.2014.10.28, Vol.90, No.10, pp.110-113, 2014
Abstract:

The paper presents the microscopic and mechanoacoustic study of degradation processes of the porcelain material C 110 type. Small-sized samples, derived from the low voltage insulator, were subjected to a slow, quasi-static compression, with simultaneous recording of acoustic emission descriptors. There were distinguished consecutive stages of the material degradation. Obtained results were compared with the images of the microstructure of low-voltage insulator materials after many years of operation. On this basis, there were distinguished the factors determinant of the short-term strength of porcelain and its resistance to ageing processes under operating conditions.

Keywords:

electrical porcelain, microscopic analysis, acoustic emission, degradation of the porcelain

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Kúdela Jr S.-Institute of Materials and Machine Mechanics, Slovak Academy of Sciences (SK)
3.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Kúdela Jr S., Evaluation of the mullite hypothesis in respect of electrotechnical porcelains, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, DOI: 10.2478/amm-2013-0158, Vol.58, No.4, pp.1177-1181, 2013
Abstract:

The paper presents the evaluation of the mullite hypothesis explaining the strength of porcelains. There was researched the influence of the mullite phase on the short- and long-term mechanical strength of electrotechnical porcelain of different types (C 110, C 112, C 120 and C 130). The total mullite phase content, the size and distribution of precipitates and dispersed single crystals in the glassy matrix were considered. Mechanoacoustic and microscopic techniques as well as ultrasonic testing were used during the investigation. The role of the mullite phase in the increase of strength and resistance to aging processes of electrical porcelain of various types was described. Mullite hypothesis is valid in reference to siliceous (C 110), cristobalite (C 112) and aluminous C 120 type materials of a typical raw components content and phase composition. In the case of modern strengthened C 120 and C 130 type aluminous materials advantageous are only dispersed fine mullite needles. The precipitates of mullite phase, especially of bigger size, are undesirable.

Keywords:

electrotechnical porcelain, porcelain degradation, acoustic emission (AE), microscopic analysis

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Kúdela Jr S.-Institute of Materials and Machine Mechanics, Slovak Academy of Sciences (SK)
4.Ranachowski P., Rejmund F., Etienne J., In Memoriam A Look at the Life and Activity of a Prominent Polish Acoustician of the 20th Century Professor Ignacy MALECKI (1912–2004) on the Occasion of the Centenary Anniversary of His Birth, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, DOI: 10.2478/aoa-2013-0001, Vol.38, No.1, pp.3-12, 2013
Abstract:

Ignacy Malecki was born on November 18, 1912, at the family estate of Pokiewnia near Vilnius. After Poland regained its independence in 1918, the town was at the border of the Second Republic of Poland and Central Lithuania. The church and village were located in the Polish area, while the family estate on the Lithuanian side. It took some time before those parts could be reunited.
....

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Etienne J.-IPPT PAN
5.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Kúdela Jr S., Rola fazy mulitowej w podwyższeniu odporności elektroporcelan na procesy starzeniowe, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.88, No.11b, pp.162-165, 2012
Abstract:

W pracy przedstawiono badania wpływu fazy mulitowej na krótko- i długotrwałą wytrzymałość mechaniczną elektroporcelan rodzaju C 110, C 112, C 120 oraz C 130. Rozpatrywana była sumaryczna zawartość fazy mulitowej, wielkość i rozłożenie jej wydzieleń oraz niezaglomeryzowanych kryształów w osnowie szklistej. W badaniach wykorzystano metodę mechanoakustyczną, techniki mikroskopowe (MO i SEM) oraz metodę ultradźwiękową. Przedstawiono rolę fazy mulitowej w podwyższeniu odporności na procesy starzeniowe porcelany elektrotechnicznej różnego rodzaju.

Keywords:

porcelana elektrotechniczna, degradacja tworzyw porcelanowych, emisja akustyczna, badania mikroskopowe

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
Kúdela Jr S.-Institute of Materials and Machine Mechanics, Slovak Academy of Sciences (SK)
6.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Mechanoacoustic and microscopic study of aluminous porcelain resistance to structural degradation, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, DOI: 10.2478/v10172-011-0140-7, Vol.56, No.4, pp.1227-1233, 2011
Abstract:

The paper presents mechanoacoustic and microscopic testing of degradation processes of modern C 120 electrotechnical porcelain of domestic medium voltage line insulator. Samples of small dimensions, cut off from the rod of insulator, were subjected to compressive loading, with recording of acoustic emission descriptors. Microscopic analysis enabled determining the advancement of degradation effects. Three stages of the structure degradation were distinguished. The effectiveness of dispersive and fibrous reinforcement of modern aluminous porcelain C 120 type has been described. Structural strengthening by corundum grains and mullite needle shaped crystals improves mechanical parameters and distinguishes this material from typical aluminosilicate ceramics. The presented results enable drawing up the conclusions concerning the resistance of investigated material to the ageing degradation process development during long term operation.

Keywords:

aluminous porcelain, structural degradation, acoustic emission (AE), microscopic analysis

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
7.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Aluminous porcelain degradation study using mechanoacoustic and microscopic methods, ARCHIVES OF ELECTRICAL ENGINEERING, ISSN: 0004-0746, DOI: 10.2478/v10171-011-0011-x, Vol.60, No.2, pp.109-128, 2011
Abstract:

This experimental paper comprises the results of acoustic emission (AE), microscopic and ultrasonic measurements of samples subjected to slowly increasing compressive stress. On the basis of conducted measurements the successive stages of the material structural degradation have been recognized. The objects of study were samples made of C 120 aluminous porcelain. The investigated material has found at present the application in the fabrication of technical elements like overhead power line insulators. In the case of such objects, not only high mechanical strength, but especially elevated durability as well as operational reliability are required. The expected "life time" of net insulators during exploitation is about 40 years. The analysis of obtained mechanoacoustic dependences pointed out a complex mechanism of degradation of the material. Microscopic investigation of samples, which were stressed to different levels of load, enabled to specify the development of gradual growth of microcracks and successive crushing out of elements of the structure. These processes appear to be similar to the ageing processes occurring in the material during long period of exploitation under a working load. Three stages of the structure degradation were distinguished. The preliminary and subcritical ones show low or moderate intensity of AE signals and considerable variety for the particular samples. The critical stage directly precedes the destructtion of samples. Its range is relatively narrow and reveals the AE activity of high energy. The effectiveness of dispersive and fibrous reinforcement of modern aluminous porcelain C 120 type has been described. Structural strengthening by corundum grains and mullite needle shaped crystals improves mechanical parameters and distinguishes this material from typical aluminosilicate ceramics. The presented results enable drawing up the conclusions concerning the resistance of investigated material to the ageing degradation process development during long term operation.

Keywords:

aluminous porcelain, ceramic insulators, insulator testing, acoustic emission, microscopic analysis, structural degradation

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
8.Ranachowski P., Rejmund F., Ranachowski Z., Jaroszewski M., Pospieszna J., Wieczorek K., Acoustic investigations of long-rod insulators and their material properties, IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, ISSN: 1070-9878, Vol.17, No.1, pp.81-88, 2010
Abstract:

The paper presents a nondestructive ultrasonic method of investigating long-rod insulators used on overhead power lines and in substations. A correlation between the degree of degradation of porcelain C 120 and the ultrasonic wave propagation and attenuation parameters was established. The ultrasonic method was used to analyze the quality of groups of line and post insulators after many years of service. Also a new mechanoacoustic method of investigating the stages in the degradation of insulator porcelain was applied. As a result of the investigations carried out on samples of porcelain C 130 the successive stages in the degradation of ceramic insulators during their service life were determined.

Keywords:

Ceramic insulators, insulator testing, acoustic measurements, ultrasonic applications, acoustic emission

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Jaroszewski M.-other affiliation
Pospieszna J.-other affiliation
Wieczorek K.-other affiliation
9.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Foundations of mechanoacoustic method of material degradation research, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.R 86, No.5, pp.186-198, 2010
Abstract:

The paper presents the concept of mechanoacoustic testing of degradation processes of ceramic electrotechnical materials. Samples of small dimensions were subjected to slowly increasing compressive loading with simultaneous recording of acoustic emission descriptors. The process was continued to the destruction or it was stopped at various stages of degradation of the material structure. Microscopic analysis of samples enabled determining the effects of stress action.

Keywords:

acoustic emission (AE), material degradation, electrotechnical ceramics

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
10.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Experimental evaluation of resistance to degradation of modern C 120 type porcelain, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.86, No.11b, pp.126-129, 2010
11.Ranachowski P., Rejmund F., Jaroszewski M., Wieczorek K., Study of structural degradation of ceramic material of insulators in long term operation, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.54, No.1, pp.205-216, 2009
12.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Kúdela Jr S., Materials degradation research on the basis of mechanoacoustic and microscopic methods, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.54, No.4, pp.824-832, 2009
13.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Comparison of acoustic emission and structure degradation in compressed porcelain and corundum materials, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.34, No.4, pp.705-722, 2009
14.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Structure degradation, texture and acoustic emission in compressed corundum ceramics, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.53, No.3, pp.703-709, 2008
15.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Mechanical-acoustic study of degradation processes of ceramic structure illustrated by corundum material, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.84, No.10, pp.252-255, 2008
16.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Research of degradation processes of insulator porcelain C 130 type, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4S, pp.117-122, 2008
Abstract:

This paper presents the results of acoustic emission (AE) measurements of samples under compressive stress. Additional research, concerning structure and parameters of the material, was performed using microscopic and ultrasonic methods. The object of the investigation were samples of porcelain material C 130 type of domestic long-rod insulator LP 75/31W. This kind of aluminous porcelain demonstrates high mechanical and electrical strength as well as resistance to aging degradation processes. It finds wide application in modern electrotechnical engineering. The aim of this study was to recognize stages of degradation processes of the porcelain structure. The present work constitutes a continuation of the study concerning the influence of technological faults, existing in porcelain material structure, on long-term mechanical strength. These results were presented at the OSA Conference in 2006. The analysis of mechanical-acoustic characteristics pointed out diversified strength and complicated mechanism of the material degradation. The effectiveness of the dispersive and fibrous reinforcement of aluminous porcelain C 130 type was ascertained. It was stated during the microscopic investigation that the structure of the material is different from that in the case of typical aluminosilicate ceramic materials. The main reason for this effect is due to densely dispersed corundum and mullite fine crystals in glassy matrix.

Keywords:

porcelain material C 130 type, acoustic emission, compressive strength, structural degradation

Affiliations:
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Ranachowski Z.-IPPT PAN
Pawełek A.-other affiliation
Piątkowski A.-Institute of Metallurgy and Materials Science, Polish Academy of Sciences (PL)
17.Ranachowski Z., Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Jasieński Z., The study of influence of high pressure torsion process on acoustic emission activity of compressed Mg - Li alloys, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4S, pp.123-128, 2008
18.Ranachowski Z., Rejmund F., Ranachowski P., Mechanical-acoustic method used to estimate porcelain materials degradation, POMIARY AUTOMATYKA KONTROLA, ISSN: 0032-4140, Vol.54, No.10, pp.716-719, 2008
19.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Mechanical- acoustic and structural investigations of degradation processes of aluminous insulator porcelain C 130 type, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.52, No.4, pp.551-564, 2007
20.Ranachowski P., Rejmund F., Metody mikroskopowe w badaniach właściwości struktury ceramicznych tworzyw elektrotechnicznych, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.5, No.3, pp.202-205, 2007
21.Ranachowski P., Rejmund F., Bertrand J., Badania procesów starzeniowych w krystobalitowej porcelanie izolatorów długopniowych, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.83, No.6, pp.88-94, 2007
22.Pawełek A., Kuśnierz J., Bogucka J., Jasieński Z., Ranachowski Z., Ranachowski P., Rejmund F., Dębowski T., Acoustic emission and the Portevin-Le Chatelier effect in tensile tested Al processed by ARB technique, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4, pp.955-962, 2007
Abstract:

The paper presents the investigations of the relation between the acoustic emission (AE) and the Porte vin-Le Chatelier (PL) phenomena occurring in tensile tested two kinds of aluminium alloys: not-predeformed and predeformed earlier using the technique of accumulative rolling banding (ARB). There have been found essential correlations between AE and PL effects in ARB not-predeformed alloys. The tensile tests for ARB predeformed alloys were performed on a series of samples of various degree of work hardening and it has been observed that the correlations between the AE and PL effects are not so pronounced as in the case of ARB not-predeformed alloys. The results of AE measurements obtained using a new software allowed additionally to carry out the spectral analysis of AE signals and, in consequence, to determine the acoustic maps (acoustograms) and the spectral characteristics which are very useful in the discussion of the relations between the non-homogeneous strain mechanisms of the PL effect and the mechanisms of AE events generation. The results are discussed in the context of the existing dislocation models of the PL effect and the theoretical concepts of AE sources

Keywords:

acoustic emission (AE), Portevin-Le Chatelier (PL) effect, tensile test, dislocations, strain mechanism, nanocrystalline and/or ultra fine-grained structure, accumulative rollbonding (ARB)

Affiliations:
Pawełek A.-other affiliation
Kuśnierz J.-other affiliation
Bogucka J.-other affiliation
Jasieński Z.-other affiliation
Ranachowski Z.-IPPT PAN
Ranachowski P.-IPPT PAN
Rejmund F.-IPPT PAN
Dębowski T.-IPPT PAN
23.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Acoustic - mechanical and microscopic investigation of corundum material, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4, pp.963-970, 2007
24.Aleksiejuk M., Rejmund F., Acoustic wave velocity in Ag/Fe nanolayers, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.32, No.4, pp.47-56, 2007
Abstract:

The paper presents the results of acoustic wave velocity investigation in metallic Ag/Fe nanolayers deposited on GaAs substrate. Measurements of velocity were performed using femtosecond technique. Ag/Fe samples were characterized by different thickness of bilayers. On the basis of experimental results of velocities, effective elastic constants c11 were evaluated. In the range of bilayers thickness above 80 Å the c11 values are in accordance with those calculated from the elastic constants of bulk materials (Rytov model). For lower values of bilayer thickness elastic constants exhibit large decrease. Grimsditch’s model was applied to interpret changes of elastic constants dependence for low bilayer thickness. This model contains an additional interlayer treated as the parameter. Comparison the values of theoretical elastic constants obtained by applying of Grimsditch model with those calculated from experiment shows qualitative accordance in the range of small bilayer thickness.

Keywords:

metallic nanolayers, effective elastic constants nanolayers

Affiliations:
Aleksiejuk M.-IPPT PAN
Rejmund F.-IPPT PAN
25.Ranachowski P., Rejmund F., Bertrand J., Ocena odporności izolatorów z porcelany krystobalitowej rodzaju 112 na procesy degradacji starzeniowej, ENERGETYKA, PROBLEMY ENERGETYKI I GOSPODARKI PALIWOWO-ENERGETYCZNEJ, ISSN: 0013-7294, Vol.XII, pp.102-105, 2007
26.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Study of degradation processes in corundum material using acoustic and microscopic methods, PRACE KOMISJI NAUK CERAMICZNYCH - POLSKI BIULETYN CERAMICZNY. CERAMIKA, ISSN: 0860-3340, Vol.101, pp.265-274, 2007
27.Ranachowski P., Rejmund F., Jaroszewski M., Ocena degradacji tworzyw ceramicznych izolatorów liniowych WN po wieloletniej eksploatacji na podstawie badań ultradźwiękowych i strukturalnych, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.4, pp.216-219, 2006
28.Aleksiejuk M., Rejmund F., The Fourier analysis of picosecond acoustic signals generated by laser beam in Au/V nanolayers, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.31, No.4, pp.131-135, 2006
Abstract:

Paper presents the results of study of picosecond acoustic signals generated by femtosecond laser pump pulse in Au/V multilayers. Au/V nanostructures with a period of 36-205Å located on MgO substrate were studied. The dependence of measured changes of the laser light reflectivity from nanostructure surface on different delays of probe beam was examined. Peak frequencies obtained by FFT analysis were interpreted as frequencies of acoustical localized modes. The obtained values of these localized modes are in agreement with numerical results. In the same sample localized modes were excited simultaneously in the first and second frequency forbidden gaps.

Keywords:

picosecond acoustics, metallic nanolayers, FFT analysis

Affiliations:
Aleksiejuk M.-IPPT PAN
Rejmund F.-IPPT PAN
29.Balcerzak A., Rejmund F., Gutkiewicz P., Zienkiewicz B., Zhavnerko G., Ultrasonic chemical sensor with organic monomolecular layer, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.31, No.4, pp.47-52, 2006
Abstract:

In this work a structure of a ultrasonic chemical sensor with organic monomolecular layer as well as introductory measurement with the help of a set-up constructed in IFTR PAS are presented. Chemical composition of this layer is an equimolar mixture of 5-[[1,3-dioxo-3- [4-(1-oxooctadecyl) phenyl] propyl] amino] – 1,3 – benzenedicarboxylic acid (DA) and cetylamine (CA). The thickness of this layer is equal to dimension of one molecule. The sensor layer was deposited on one channel of the bi-channel sensor delay line (made from lithium niobiate) by means of the Langmuir–Blodgett method. The chemical sensitivity of this sensor to some mixtures of air with vapor of volatile organic compounds has been investigated

Keywords:

ultrasonic chemical sensor, Langmuir–Blodgett layers, air-organic vapor mixtures, volatile organic compounds

Affiliations:
Balcerzak A.-IPPT PAN
Rejmund F.-IPPT PAN
Gutkiewicz P.-IPPT PAN
Zienkiewicz B.-IPPT PAN
Zhavnerko G.-Institute of Chemistry of New Materials, Belarus National Academy of Sciences (BY)
30.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Investigation of influence of defectiveness in aluminous porcelain structure on fracture process under compressive loading using Acoustic Emission Method, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.31, No.4, pp.83-90, 2006
31.Fleszyński J., Ranachowski P., Ranachowski Z., Rejmund F., Ultrasonic non-destructive diagnostics of ceramics line insulators, INSIGHT, ISSN: 1354-2575, Vol.47, pp.530-535, 2005
32.Jaroszewski M., Ranachowski P., Rejmund F., Fleszyński J., Ultradźwiękowa diagnostyka ceramicznych izolatorów liniowych po wieloletniej eksploatacji, PRZEGLĄD ELEKTROTECHNICZNY, ISSN: 0033-2097, Vol.3, pp.211-214, 2005
33.Ranachowski P., Ranachowski Z., Rejmund F., Stankiewicz J., Acoustic examination of epoxy-glass insulator material, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, Vol.30, No.1, pp.121-130, 2005
Abstract:

Ultrasonic, microscopic and acoustic emission (AE) methods were applied to investigate the microstructure of composite rods, used as a carrying element of the medium voltage insulators. Such features of material structure as homogeneity level and the appearance of defects were discussed. The research was aimed at determining the influence of the technology of epoxy-glass fabrication on quality parameters of the insulator rods. The results of acoustic testing were compared with the effects of microscopic investigation.

Keywords:

composite insulator, epoxy-glass material, nondestructive ultrasonic measurements, acoustic emission

Affiliations:
Ranachowski P.-IPPT PAN
Ranachowski Z.-IPPT PAN
Rejmund F.-IPPT PAN
Stankiewicz J.-IPPT PAN
34.Ranachowski P., Rejmund F., Pawełek A., Piątkowski A., Badania tworzywa kordierytowego przy naprężeniach ściskających w różnych temperaturach oraz po szoku termicznym, PRACE KOMISJI NAUK CERAMICZNYCH - POLSKI BIULETYN CERAMICZNY. CERAMIKA, ISSN: 0860-3340, Vol.89, pp.101-115, 2005
35.Balcerzak A., Rejmund F., Gutkiewicz P., Zienkiewicz B., Zhavnerko G., Surface acoustic wave (saw) chemical sensor with Langmuir-Blodgett layer, PRACE KOMISJI NAUK CERAMICZNYCH - POLSKI BIULETYN CERAMICZNY. CERAMIKA, ISSN: 0860-3340, Vol.89, pp.190-195, 2005
36.Rejmund F., Metody akustyczne; Badania dynamiki wybranych procesów fizykochemicznych - ośrodkach materialnych (Praca habilitacyjna), Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.6, pp.1-75, 1999
37.Antonowicz G.G., Ranachowski J., Rejmund F., Ocena wytrzymałości mechanicznej i odporności termicznej ceramiki z wykorzystaniem metody emisji akustycznej, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.11, pp.1-17, 1996
38.Librant Z., Ranachowski J., Rejmund F., Ceramika konstrukcyjna elementy technologii i wybrane własności, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.5, pp.1-108, 1993
39.Ranachowski J., Rejmund F., Emisja akustyczna w procesie kruchego pękania ceramiki, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.27, pp.1-98, 1993
40.Ranachowski J., Rejmund F., Schallemission in Stoff-und Baueelementprüfung, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.34, pp.1-28, 1993
41.Ranachowski J., Rejmund F., Librant Z., Badanie ośrodków kruchych metodą emisji akustycznej na przykładzie ceramiki i betonów, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.28, pp.1-114, 1992
42.Skubis J., Wiśniewska T., Rejmund F., Pomiary wybranych parametrów emisji akustycznej emitowanej przez wyładowania elektryczne, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.15, pp.1-35, 1990
43.Ranachowski J., Rejmund F., Librant Z., Akustyka w badaniach materiałów ceramicznych, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.28, pp.1-59, 1984

List of chapters in recent monographs
1.
171
Ranachowski P., Ranachowski Z., Rejmund F., Brittle Matrix Composites 9, rozdział: Mechanical - acoustic and structural study of degradation processes in corundum ceramics and aluminous porcelain, Brandt A.M., Olek J., Marshall I.H., Woodhead Pub. Ltd. Cambridge and IFTR PAS, Warsaw, pp.201-214, 2009

Conference papers
1.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Mechanoacoustic study of ceramic electrotechnical material, 56th Open Seminar on Acoustics, 2009-09-15/09-18, Goniądz nad Biebrzą (PL), pp.99-104, 2009
2.Ranachowski P., Rejmund F., Ranachowski Z., Pawełek A., Piątkowski A., Mechanoacoustic study of ceramic electrotechnical material, 56th Open Seminar on Acoustics, 2009-09-15/09-18, Goniądz nad Biebrzą (PL), pp.99-104, 2009
3.Ranachowski P., Ranachowski Z., Rejmund F., Stankiewicz J., Wstępne badania procesu zaciskania okuć na prętach nośnych izolatorów kompozytowych z wykorzystaniem emisji akustycznej, VI Konferencja Naukowa Postępy w Elektrotechnologii, 2006/, Jamrozowa Polana (PL), pp.292-300, 2006
4.Rysakov V.M., Rejmund F., Zienkiewicz B., Analysis of particle distribution according to sizes in emulsions by scattering of light in ultrasonic beam, Conference on Acousto-Optics and Applications V, 2004-08-04/08-10, Gdańsk (PL), DOI: 10.1117/12.612844, Vol.5828, pp.146-153, 2005
Abstract:

In the presented work the new method of the analysis of particle distribution in the emulsion according to the sizes with the increased resolution by means of the scattering of light is considered. A significant increase in the possibilities of the proposed method is achieved due to the additional introduction into the emulsion of physically powerful ultrasonic flow and make use of the frequency-phase method of detection. Fundamental special features of procedure and some technical questions are discussed.

Keywords:

light scattering, ultrasonic field, Doppler effect, emulsion, distribution of particles, frequency-phase detector

Affiliations:
Rysakov V.M.-other affiliation
Rejmund F.-IPPT PAN
Zienkiewicz B.-IPPT PAN
5.Aleksiejuk M., Baczewski T., Bonello B., Rejmund F., Laser excited 100 GHz localized acoustic modes in Au/V nanolayers structures, Conference on Acousto-Optics and Applications V, 2004-08-04/08-10, Gdańsk (PL), DOI: 10.1117/12.612779, Vol.5828, pp.154-163, 2005
Abstract:

This work presents analysis of localized acoustic modes using theory given by B. Djafari-Rouchani et al. and Rytov model of elastic waves propagation in periodical medium. Localized modes were considered for Au/V nanostructures. Experimentally Au/V nanostructures on MgO substrate with period 120-240 angstrom were studied. Changes of light reflectivity coefficient of these nanostructures caused by femtosecond laser beam excitation were measured. Analysis of experimental results of reflectivity dependence on delay time of probe beam was made over the range up to 150 ps. The dependences of localized modes frequency on thickness of nanostructure bilayers were obtained. Measured frequencies of localized modes remain in agreement to the theoretical values.

Keywords:

metallic nanolayers, picosecond acoustics, localized modes, Rytov model

Affiliations:
Aleksiejuk M.-IPPT PAN
Baczewski T.-other affiliation
Bonello B.-other affiliation
Rejmund F.-IPPT PAN