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The study of the tribological properties under high contact pressure conditions of TiN, TiC and TiCN coatings deposited by the magnetron sputtering method on the AISI 304 stainless steel substrate

Mamaeva Axaule Alipovna, Kenzhegulov Aidar Karaulovich, Panochkin Aleksander Vladimirovich, Alibekov Zhasulan Zhanuzakovich, Kshibekova Balzhan Bolatovna, Wieleba Wojciech, Leśniewski Tadeusz, Bakhytuly Nauryzbek

Materials Science Poland

2023

Vol. 41, No. 1

1--14

Titanium carbonitride coatings are widely used to improve the wear resistance of surfaces. The results of tribological investigations of TiC, TiN, and TiCN coatings deposited on an AISI 304 steel substrate by the magnetron sputtering method were presented. The research aimed to describe the wear processes of the coatings during friction in an emergency situation, i.e. with a lack of lubrication and concentration of pressure in a small contact area. Tribological tests were performed on a ball-on-disk tribotester in reciprocating motion under technically dry friction conditions. The Hertz pressure in the contact area was ph = 2500-2700 MPa. Additionally, scratch tests and microscopic observations of the surfaces of the samples were performed after tribological tests to describe the wear process of the coatings. The results showed cracking, and coatings detachment from the substrate occur during friction. Deformation wear was observed as bulges in the material at the edge of the friction path. The deformation occurred primarily in the substrate material despite friction occurring on the surface of the coating. The best coating in terms of tribological properties was the TiN coating, which showed the highest resistance to wear in an emergency situation and the friction coefficient in the final stage of the test (above 90 cycles of movement) was only slightly higher than the values recorded for the other coatings. The TiN coating had high hardness, showed good adhesion to the substrate, and was not cracked, protecting it from damage.

Comparative studies of tribological properties of selected polymer resins for use in hydraulic systems

Lubecki Marek, Stosiak Michał, Leśniewski Tadeusz

Tribologia

2019

nr 6

31--37

The use of composite materials in the construction of hydraulic cylinders allows for a significant reduction in the weight of the element while maintaining its operating parameters. One of the issues to be solved at the design stage is to ensure the tightness of the cylinder and the correct cooperation of the cylinder with the piston. Four materials that can be used as internal coatings in such composite cylinders were selected in the work. Preliminary tests using the ball-on-disk method and observation of signs of wear were carried out using an optical microscope and SEM. After testing, materials for further studies were selected.

Wykorzystanie materiałów kompozytowych w konstrukcji siłowników hydraulicznych pozwala na znaczne zmniejszenie masy elementu, przy jednoczesnym zachowaniu jego parametrów pracy. Jednym z zagadnień, które trzeba rozwiązać na etapie projektowym, jest zapewnienie szczelności cylindra oraz prawidłowej współpracy cylindra z tłokiem. W pracy wytypowano cztery materiały mogące znaleźć zastosowanie jako powłoki wewnętrzne w takich kompozytowych cylindrach. Przeprowadzono badania wstępne metodą ball on disk oraz obserwacje śladów zużycia przy wykorzystaniu mikroskopu optycznego oraz SEM. Po przeprowa¬dzeniu prób wytypowano materiały, które wykorzystane zostaną w dalszych badaniach.