Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Possibilities of Duplex Plasma Electrolytic Treatment for In-Creasing the Hardness and Wear Resistance of the CP-Ti Surface

Sergei Kusmanov
* ORCID logo ,
Tatiana Mukhacheva
ORCID logo ,
Ivan Tambovskiy
,
Irina Kusmanova
,
Sergei Shadrin
,
Roman Belov
,
Roman Nikiforov
ORCID logo ,
Igor Suminov
ORCID logo ,
Mikhail Karasev
,
Sergey Grigoriev
Version 1 : Received: 21 June 2023 / Approved: 21 June 2023 / Online: 21 June 2023 (10:33:24 CEST)

A peer-reviewed article of this Preprint also exists.

Kusmanov, S.; Mukhacheva, T.; Tambovskiy, I.; Kusmanova, I.; Shadrin, S.; Belov, R.; Nikiforov, R.; Suminov, I.; Karasev, M.; Grigoriev, S. Possibilities of Duplex Plasma Electrolytic Treatment for Increasing the Hardness and Wear Resistance of a Commercially Pure Titanium Surface. Coatings 2023, 13, 1363. Kusmanov, S.; Mukhacheva, T.; Tambovskiy, I.; Kusmanova, I.; Shadrin, S.; Belov, R.; Nikiforov, R.; Suminov, I.; Karasev, M.; Grigoriev, S. Possibilities of Duplex Plasma Electrolytic Treatment for Increasing the Hardness and Wear Resistance of a Commercially Pure Titanium Surface. Coatings 2023, 13, 1363.

Abstract

The possibility of increasing wear resistance of the CP-Ti surface using a duplex surface treat-ment combining plasma electrolytic nitrocarburizing in a solution of ammonia, acetone and ammonium chloride and subsequent plasma electrolytic polishing is shown. Morphology and surface roughness, structure and microhardness of the modified layer were studied. The correla-tion of weight wear with hardness of diffusion layer at a low processing temperature and thick-ness of oxide layer is established – the largest decrease in weight wear occurs after nitrocarbu-rizing at 750 °C for 5 min (by 4.3 times). The possibility of an additional increase in wear re-sistance by subsequent polishing of the nitrocarburized CP-Ti surface at a voltage of 275–300 V for 3–5 min in chloride and fluoride electrolytes and 5–10 min in a sulfate electrolyte was re-vealed. Under these conditions, the hardened layer is preserved when the porous outer oxide layer is removed. According to the microtopology of the friction tracks, the wear mechanism is estimated as fatigue in dry friction and plastic contact.

Keywords

plasma electrolytic nitrocarburising; plasma electrolytic polishing; CP-Ti; friction; wear; microhardness; roughness

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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