Institute of Fundamental Technological Research
Polish Academy of Sciences

Staff

Michał Milczarek, MSc

Department of Mechanics of Materials (ZMM)
PhD student
telephone: (+48) 22 826 12 81 ext.: 434
room: 239
e-mail:
ORCID: 0000-0002-5510-2093

Recent publications
1.  Psiuk R., Milczarek M., Jenczyk P., Denis P., Jarząbek D., Bazarnik P., Pisarek M., Mościcki T., Improved mechanical properties of W-Zr-B coatings deposited by hybrid RF magnetron – PLD method, APPLIED SURFACE SCIENCE, ISSN: 0169-4332, DOI: 10.1016/j.apsusc.2021.151239, Vol.570, pp.151239-1-11, 2021

Abstract:
In this work, novel W-Zr-B coatings were developed by a hybrid process combining pulsed laser deposited ZrB2 and radio frequency magnetron sputtered W2B5. The influence of the laser power density on the structure and mechanical properties of the deposited films was studied. Addition of zirconium causes a change in the structure of the deposited films from columnar to mainly amorphous. The nanoindentation tests and compression of nanopillars showed that doped W-Zr-B layers are still super-hard and incompressible in comparison to WB2 films without doping, but they change their behaviour from brittle to ductile. Films obtained with a fluence of 1.06 J/cm2 are superhard (H = 40 ± 4 GPa) and incompressible (12 ± 1 GPa), but possess a relatively low Young’s modulus (E = 330 ± 32 GPa) and a high elastic recovery (We = 0.9). Further increase in the fluence causes films to consist of deeply embedded fragments of laser ablated ZrB2 target in the deposited layer. Taking into account that the particles are made of ZrB2 which possess extraordinary thermal properties, and the matrix is made of W-Zr-B, a super-hard material, such a composite can also be interesting for industrial applications.

Keywords:
superhard tungsten borides, hybrid magnetron sputtering – pulsed laser deposition, nanopillar compression

Affiliations:
Psiuk R. - IPPT PAN
Milczarek M. - IPPT PAN
Jenczyk P. - IPPT PAN
Denis P. - IPPT PAN
Jarząbek D. - IPPT PAN
Bazarnik P. - Warsaw University of Technology (PL)
Pisarek M. - other affiliation
Mościcki T. - IPPT PAN
2.  Jenczyk P., Grzywacz H., Milczarek M., Jarząbek D.M., Mechanical and tribological properties of co-electrodeposited particulate-reinforced metal matrix composites: a critical review with interfacial aspects, Materials, ISSN: 1996-1944, DOI: 10.3390/ma14123181, Vol.14, No.12, pp.3181-1-36, 2021

Abstract:
Particulate-reinforced metal matrix composites (PRMMCs) with excellent tribo-mechanical properties are important engineering materials and have attracted constant scientific interest over the years. Among the various fabrication methods used, co-electrodeposition (CED) is valued due to its efficiency, accuracy, and affordability. However, the way this easy-to-perform process is carried out is inconsistent, with researchers using different methods for volume fraction measurement and tribo-mechanical testing, as well as failing to carry out proper interface characterization. The main contribution of this work lies in its determination of the gaps in the tribo-mechanical research of CED PRMMCs. For mechanical properties, hardness is described with respect to measurement methods, models, and experiments concerning CED PRMMCs. The tribology of such composites is described, taking into account the reinforcement volume fraction, size, and composite fabrication route (direct/pulsed current). Interfacial aspects are discussed using experimental direct strength measurements. Each part includes a critical overview, and future prospects are anticipated. This review paper provides an overview of the tribo-mechanical parameters of Ni-based co-electrodeposited particulate-reinforced metal matrix composite coatings with an interfacial viewpoint and a focus on hardness, wear, and friction behavior.

Keywords:
experimental mechanics, tribology, co-electrodeposited composites

Affiliations:
Jenczyk P. - IPPT PAN
Grzywacz H. - IPPT PAN
Milczarek M. - IPPT PAN
Jarząbek D.M. - other affiliation
3.  Grzywacz H., Milczarek M., Jenczyk P., Dera W., Michałowski M., Jarząbek D.M., Quantitative measurement of nanofriction between PMMA thin films and various AFM probes, MEASUREMENT, ISSN: 0263-2241, DOI: 10.1016/j.measurement.2020.108267, Vol.168, pp.108267-1-13, 2020

Abstract:
This study reports the quantitative, precise and accurate results of nanoscale friction measurements with the use of an Atomic Force Microscope calibrated with a precise nanoforce sensor. For this purpose, three samples of spin-coated thin Polymethylmethacrylate (PMMA) films were prepared with the following thicknesses: 235, 343, and 513 nm. Three different AFM probes were used for the friction measurements: with diamond-like carbon (DLC) tip with a small (15 nm) or big (2 µm) tip radius, and a reference silicon tip with a small (8 nm) radius. The results show that in all of the studied cases, the coefficient of friction strongly depends on the applied load, being much higher for a lower load. Furthermore, a strong relation of the friction force on the cantilever's geometry, the scanning velocity, and the film thickness was observed.

Keywords:
lateral force microscopy, friction, thin PMMA films, atomic force microscope, DLC coatings, adhesion

Affiliations:
Grzywacz H. - other affiliation
Milczarek M. - IPPT PAN
Jenczyk P. - IPPT PAN
Dera W. - IPPT PAN
Michałowski M. - Warsaw University of Technology (PL)
Jarząbek D.M. - other affiliation
4.  Jarząbek D.M., Milczarek M., Nosewicz S., Bazarnik P., Schift H., Size effects of hardness and strain rate sensitivity in amorphous silicon measured by nanoindentation, METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, ISSN: 1073-5623, DOI: 10.1007/s11661-020-05648-w, Vol.51, No.4, pp.1625-1633, 2020

Abstract:
In this work, dynamic mechanical properties of amorphous silicon and scale effects were investigated by the means of nanoindentation. An amorphous silicon sample was prepared by plasma-enhanced chemical vapor deposition (PECVD). Next, two sets of the samples were investigated: as-deposited and annealed in 500 °C for 1 hour. A three-sided pyramidal diamond Berkovich's indenter was used for the nanoindentation tests. In order to determine the strain rate sensitivity (SRS), indentations with different loading rates were performed: 0.1, 1, 10, 100 mN/min. Size effects were studied by application of maximum indentation loads in the range from 1 up to 5 mN (penetrating up to approximately one-third of the amorphous layer). The value of hardness was determined by the Oliver-Pharr method. An increase of hardness with decrease of the indentation depth was observed for both samples. Furthermore, the significant dependence of hardness on the strain rate has been reported. Finally, for the annealed samples at low strain rates a characteristic "elbow" during unloading was observed on the force-indentation depth curves. It could be attributed to the transformation of (β-Sn)-Si to the PI (pressure-induced) a-Si end phase.

Affiliations:
Jarząbek D.M. - IPPT PAN
Milczarek M. - IPPT PAN
Nosewicz S. - IPPT PAN
Bazarnik P. - Warsaw University of Technology (PL)
Schift H. - Paul Scherrer Institut (CH)
5.  Jarząbek D.M., Milczarek M., Wojciechowski T., Dziekoński C., Chmielewski M., The effect of metal coatings on the interfacial bonding strength of ceramics to copper in sintered Cu-SiC composites, CERAMICS INTERNATIONAL, ISSN: 0272-8842, DOI: 10.1016/j.ceramint.2017.01.056, Vol.43, No.6, pp.5283-5291, 2017

Abstract:
Cu-SiC composites are very promising materials which have high thermal and electrical conductivity and may find many applications. Unfortunately, the main disadvantage of these materials is the dissolution of silicon in copper at elevated temperature, which significantly reduces their properties. In order to overcome this problem particles can be coated with a protective material before sintering. In this paper– the influence of three different metallic coatings on bonding strength were investigated. SiC particles were coated with tungsten, chromium or titanium. As reference a material with uncoated particles was prepared. The experiments were carried out with the use of microtensile tester. The highest increase in strength was observed in the case of chromium coating. On the other hand, the titanium coating, which was of very poor quality, decrease the bonding strength in comparison with uncoated particles. Furthermore, scanning electron and optical microscopes were used to determine the mechanism of debonding.

Keywords:
interfacial bonding strength, metal matrix composites, tensile strength, silicon carbide particles

Affiliations:
Jarząbek D.M. - IPPT PAN
Milczarek M. - other affiliation
Wojciechowski T. - Institute of Physics, Polish Academy of Sciences (PL)
Dziekoński C. - IPPT PAN
Chmielewski M. - Institute of Electronic Materials Technology (PL)

Patents
Filing No./Date
Filing Publication
Autors
Title
Protection Area, Applicant Name
Patent Number
Date of Grant
pdf
431859
2019-11-20
BUP 11/2021
2021-05-31
Jarząbek D.M., Milczarek M., Dziekoński C.
Sposób wytwarzania sond pomiarowych do mikroskopów sił atomowych
PL, Instytut Podstawowych Problemów Techniki PAN
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