Partner: D. Garbiec


Recent publications
1.Mościcki T., Radziejewska J., Hoffman J., Chrzanowska J., Levintant-Zayonts N., Garbiec D., Szymański Z., WB2 to WB3 phase change during reactive spark plasma sintering and pulsed laser ablation/deposition processes, CERAMICS INTERNATIONAL, ISSN: 0272-8842, DOI: 10.1016/j.ceramint.2015.03.042, Vol.41, pp.8273-8281, 2015
Abstract:

Reactive spark plasma sintering (SPS) of WB2/WB3 ceramics from elements is studied; the sintering pressure dependence of the ratio of WB3 to WB2 in samples produced by SPS is discussed. Regardless of the sintering pressure, the obtained samples are very hard ~20 GPa. WB3 superhard films prepared by pulsed laser deposition (PLD) from selected SPS targets are presented.

WB3 coatings were prepared on Si (100) substrates using a nanosecond, Nd:YAG laser operating at a 355 nm wavelength. The phase analysis, crystallography, and orientations have been studied using X-ray diffraction (XRD). A WB2 to WB3 phase transformation from 8.2% WB3 in a sintered target to 93.3% WB3 in a deposited film was observed. Additionally, the surface of a SPS sintered WBx target after the ablation process was examined. XRD studies show that already during the laser ablation there is a significant WB2 to WB3 phase transformation. Vickers hardness of sintered samples was measured in macro- and micro-scale, and PLD films in the nanoscale.

Keywords:

Films, Tungsten borides, SPS – sintering, Pulsed laser ablation/deposition

Affiliations:
Mościcki T.-IPPT PAN
Radziejewska J.-IPPT PAN
Hoffman J.-IPPT PAN
Chrzanowska J.-IPPT PAN
Levintant-Zayonts N.-IPPT PAN
Garbiec D.-other affiliation
Szymański Z.-IPPT PAN
2.Garbiec D., Jurczyk M., Levintant-Zayonts N., Mościcki T., Properties of Al–Al2O3 composites synthesized by spark plasma sintering method, ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, ISSN: 1644-9665, DOI: 10.1016/j.acme.2015.02.004, Vol.15, No.4, pp.933-939, 2015
Abstract:

This work presents fabrication and characterization of Al–Al2O3 composite materials with a 5%, 10%, 15% and 20% volume fraction of reinforcing phase particles. The spark plasma sintering method was applied for the purpose of fabricating these materials. The obtained Al–Al2O3 composites were characterized with an porosity from 1.27% to 5.07%. It was proven that as the content of hard ceramic particles increases in the composite, its density, hardness, and compression as well as tensile strength increase. The conducted study showed that a composite with 20% alumina content is characterized by a larger hardness (1355 MPa) and compression strength (247 MPa).

Keywords:

Spark plasma sintering, Composite material, Aluminum, Alumina

Affiliations:
Garbiec D.-other affiliation
Jurczyk M.-other affiliation
Levintant-Zayonts N.-IPPT PAN
Mościcki T.-IPPT PAN

Conference abstracts
1.Chrzanowska J., Garbiec D., Kurpaska Ł., Denis P., Hoffman J., Mościcki T., Szymański Z., The effect of substrate temperature on the properties of tungsten boride layers deposited by radio frequency magnetron sputtering and pulsed laser deposition, EYEC, 6th European Young Engineers Conference, 2017-04-24/04-26, Warszawa (PL), pp.240-240, 2017
Keywords:

RF magnetron sputtering, hard materials, PLD, tungsten boride

Affiliations:
Chrzanowska J.-IPPT PAN
Garbiec D.-other affiliation
Kurpaska Ł.-National Centre for Nuclear Research (PL)
Denis P.-IPPT PAN
Hoffman J.-IPPT PAN
Mościcki T.-IPPT PAN
Szymański Z.-IPPT PAN
2.Chrzanowska J., Denis P., Mościcki T., Hoffman J., Garbiec D., Frąś L.J. , Szymański Z., Characterization of tungsten boride layers deposited in pulsed laser ablation process, SolMech 2016, 40th Solid Mechanics Conference, 2016-08-29/09-02, Warszawa (PL), No.P257, pp.1-2, 2016
Abstract:

Tungsten boride compounds are very promising new hard and super - hard materials. This kind of materials could be used in production of high-speed tools, durable bearings and nonabrasive surfaces. The hardness of tungsten borides strongly depends on boron content as well as material microstructure. For example hardness of W2B is about 12.4 GPa, WB hardness is 18 – 36 GPa, WB2 hardness is 28.5–39.7 GPa and WB3 hardness is 28.6 – 36.9 GPa. Moreover production of tungsten borides in the form of layers or nano -grained structured increase its hardness even above 40 GPa. Although the properties of tungsten boride structures are known from theoretical calculations, the data concerning structures produced experimentally are scare. Therefore, the properties of tungsten boride layers deposited by pulsed laser deposition (PLD) process are investigated in this paper. Layers were deposited using two types of targets: with boron to tungsten ratio of 2.5:1 and 4.5:1 and with the use of two laser wavelengths: 355 and 1064 nm.

Keywords:

pulsed laser deposition, tungsten borides

Affiliations:
Chrzanowska J.-IPPT PAN
Denis P.-IPPT PAN
Mościcki T.-IPPT PAN
Hoffman J.-IPPT PAN
Garbiec D.-other affiliation
Frąś L.J. -IPPT PAN
Szymański Z.-IPPT PAN
3.Chrzanowska J., Mościcki T., Hoffman J., Garbiec D., Radiofrequency assisted pulsed laser deposition of WBN and ReBN thin films, EUROMAT 2015, European Congress and Exhibition on Advanced Materials and Processes, 2015-09-20/09-24, Warszawa (PL), pp.1-2, 2015
Keywords:

pulsed laser deposition

Affiliations:
Chrzanowska J.-IPPT PAN
Mościcki T.-IPPT PAN
Hoffman J.-IPPT PAN
Garbiec D.-other affiliation
4.Mościcki T., Garbiec D., Chrzanowska J., Hoffman J., Pulsed laser deposition of superhard rhenium and tungsten borides, ITFPC'2015, 7th International Conference on Innovations in Thin Film Processing and Characterization, 2015-11-16/11-20, Nancy (FR), pp.99, 2015
Keywords:

pulsed laser deposition, rhenium borides, tungsten borides

Affiliations:
Mościcki T.-IPPT PAN
Garbiec D.-other affiliation
Chrzanowska J.-IPPT PAN
Hoffman J.-IPPT PAN
5.Mościcki T., Hoffman J., Radziejewska J., Chrzanowska J., Levintant-Zayonts N., Garbiec D., Formation of WB4 thin films using nanosecond Nd-YAG laser, KKNM, 4th National Conference on Nano- and Micromechanics, 2014-07-08/07-10, Wrocław (PL), pp.152-154, 2014
Abstract:

Inexpensive Tungsten Tetraboride super hard coatings prepared by pulsed laser deposition (PLD) method are investigated. WB4 coatings were prepared on Si (100), by PLD technique using nanosecond, Nd:YAG laser operating at 355 nm wavelenght. Additionally the surface of SPS sintered WBx target before and after ablation process was examined. Phase change of WB2 to WB4 at the surface of target is observed. The phase analysis, crystallography and orientations have been studied using X-ray diffractometry. The surface layer of target after ablation and deposited films are found to be mostly WB4 phase with hardness HV>28 GPa.

Keywords:

laser mikro/nano engineering, thin films, pulsed laser ablation/deposition, tungsten tetraboride WB4

Affiliations:
Mościcki T.-IPPT PAN
Hoffman J.-IPPT PAN
Radziejewska J.-IPPT PAN
Chrzanowska J.-IPPT PAN
Levintant-Zayonts N.-IPPT PAN
Garbiec D.-other affiliation