Influence of substrate surface treatment on erosive wear of polycrystalline diamond coatings deposited by gas-jet method

A. A. Emel'yanov^a, M. Yu. Plotnikov^a, N. I. Timoshenko^a, I. B. Yudin^a, V. Yu. Ulianitsky^b, I. S. Batraev<sup>b

a</sup> S.S. Kutateladze Institute of Thermophysics, Siberian Division of the Russian Academy of Sciences, Novosibirsk
^b Lavrentyev Institute of Hydrodynamics of Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: The paper presents the results of a study on erosive wear of polycrystalline diamond coatings deposited on a molybdenum substrate. Prior to deposition, the substrate surface was treated with a jet of micro-particles of either corundum or silicon carbide. The diamond coating was applied using a gas-jet deposition method from a H$_2$–CH$_4$–Ar mixture activated by a microwave discharge. It was found that preliminary surface treatment of the substrate increases the wear resistance of the resulting diamond coating.

Keywords: gas-jet deposition, polycrystalline diamond film, microwave discharge, erosive wear.

UDC: 533; 54.057

Received: 20.05.2024
Revised: 31.07.2024
Accepted: 02.09.2024

DOI: 10.15372/PMTF202415516

 English version: Journal of Applied Mechanics and Technical Physics, 2025, 66:3, 440–445

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