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125 results on '"Góral, Marek"'

4. The new concept of thermal barrier coatings with Pt + Pd/Zr/Hf-modified aluminide bond coat and ceramic layer formed by PS-PVD method

Author

Góral Marek, Pytel Maciej, Kubaszek Tadeusz, Drajewicz Marcin, Simka Wojciech, and Nieużyła Łukasz

Subjects
ps-pvd, aluminide coatings, tbcs, cvd, Technology, Chemical technology, TP1-1185, Chemicals: Manufacture, use, etc., TP200-248
Abstract

Thermal barrier coatings (TBCs) are widely used for protection of gas turbine parts from high temperature and corrosion. In the present study, the new concept of TBCs with three-element-modified aluminide coatings was presented. In the first stage, the Pt and Pd were electroplated on MAR M247 nickel superalloy. In the next stage, the low-activity CVD aluminizing process with Zr or Hf doping was conducted. The ceramic layer containing yttria-stabilized zirconia was obtained by the plasma spray physical vapour deposition (PS-PVD) method. The microscopic examination showed the formation of aluminide coating containing up to 5 at% of Pt and 10 at% of Pd in (Ni, Pt, Pd)Al solid solution. The small concentration of Hf and Zr in diffusion zone of aluminide bond coat was noted as well. The outer ceramic layer was characterized by columnar structure typically formed during the PS-PVD process. The obtained results showed that the new concept of TBCs formed using new processes might be an attractive alternative to conventional coatings produced using the expensive electron beam physical vapour deposition (EB-PVD) method.

Published
2021
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7. The influence of plasma nitriding process conditions on the microstructure of coatings obtained on the substrate of selected tool steels

Author

Mokrzycka, Magdalena, primary, Przybyło, Adrianna, additional, Góral, Marek, additional, Kościelniak, Barbara, additional, Drajewicz, Marcin, additional, Kubaszek, Tadeusz, additional, Gancarczyk, Kamil, additional, Gradzik, Andrzej, additional, Dychtoń, Kamil, additional, Poręba, Marek, additional, Jopek, Jakub, additional, and Pytel, Maciej, additional

Published
2024
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8. The Influence of Industrial-Scale Pack-Boroding Process Time on Thickness and Phase Composition of Selected Cold-Work Tool Steels

Author

Jopek, Jakub, primary, Góral, Marek, additional, Koscielniak, Barbara, additional, Ochal, Kamil, additional, Drajewicz, Marcin, additional, Mokrzycka, Magdalena, additional, Kubaszek, Tadeusz, additional, Dychton, Kamil, additional, Gancarczyk, Kamil, additional, Gradzik, Andrzej, additional, Kwasniewski, Pawel, additional, and Gluchowski, Wojciech, additional

Published
2023
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15. The Surface Morphology and Optical Properties of Refined Glasses with Inorganic Nano-molecules

Author

Drajewicz Marcin, Pytel Maciej, Rokicki Paweł, and Góral Marek

Subjects
glass, surface, nano-particles, refining, Technology, Chemical technology, TP1-1185, Chemicals: Manufacture, use, etc., TP200-248
Abstract

New refining technology of soda-calcium-silicon glass surfaces with inorganic compounds nano-molecules has been presented in the study. In order to determine modification of the glass surface SEM observation and EDX analysis have been carried out. The UV-VIS, photo-elasticity and ellipsometry examinations were carried out on glass samples. The results of investigations that have been conducted show that refining process of the glass surface by use of nanopowder inorganic compounds deposited electrostatically on glass surface provides forming of very thin (about 50 nm) surface layers [1]. This method of surface modification improves physical and chemical glass properties. In this paper results of microhardness test of refined glass were also presented.

Published
2015
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16. Effect of plasma spraying parameters on microstructure and thickness and porosity of WC-CrC-Ni coatings deposited on titanium.

Author

Szymkiewicz, Krzysztof, Góral, Marek, Kubaszek, Tadeusz, and Gancarczyk, Kamil

Subjects
MICROCRACKS, PLASMA spraying, POROSITY, MICROSTRUCTURE, SURFACE coatings, X-ray diffraction
Abstract

Thermal spraying allows forming of protective coatings with high wear and corrosion resistance, which are successfully applied in the aviation industry on an aircraft engine. In the presented paper, the WC-CrC-Ni carbide coatings on titanium substrate with the use of an Atmospheric Plasma Spraying (APS) process were formed. The aim of this work was to determine optimal APS plasma spraying parameters, which will allow producing the relatively thick coating with as low as possible porosity. The microstructure of obtained carbide coatings was observed with the help of the optical microscope (OM) and scanning electron microscope (SEM). Moreover, the phase composition of produced coatings using X-ray diffraction (XRD) was determined. The obtained results of investigations revealed that the appropriate selection of process parameters (powder feed rate, power current, and plasma gases H2/Ar flow ratio) allows producing the relatively thick coatings, which are characterized by low porosity. [ABSTRACT FROM AUTHOR]

Published
2023
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