Improved tribological behavior of plasma-nitrided AlCrTiV and AlCrTiVSi high-entropy alloy films

Plasma nitriding was used to improve the tribological properties of AlCrTiV and AlCrTiVSi high-entropy alloy (HEA) films. The results indicated that after plasma nitriding, the microstructure and tribological property were improved greatly. For plasma-nitrided AlCrTiV, it is still composed of a sing...

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Bibliographic Details
Published in:Tribology international 2021-11, Vol.163, p.107195, Article 107195
Main Authors: Cai, Zhaobing, Wang, Zheng, Hong, Yue, Lu, Bingwen, Liu, Jin, Li, Yang, Pu, Jibin
Format: Article
Language:English
Subjects:
Aluminum oxide
Coefficient of friction
DC magnetron sputtering
High entropy alloys
High-entropy alloy films
Ion nitriding
Lattice parameters
Mechanical properties
Nanohardness
Plasma
Plasma nitriding
Solid solutions
Tribological behavior
Tribology
Wear rate
Wear resistance
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Summary:Plasma nitriding was used to improve the tribological properties of AlCrTiV and AlCrTiVSi high-entropy alloy (HEA) films. The results indicated that after plasma nitriding, the microstructure and tribological property were improved greatly. For plasma-nitrided AlCrTiV, it is still composed of a single BCC solid solution but with a decreased lattice constant, while for plasma-nitrided AlCrTiVSi, a new V4.75Si3N0.58 nitride phase forms in the amorphous matrix, which all lead to the increase of nano-hardness, promoting the reduction of wear degree or wear rate against GCr15 and Al2O3. Due to the perfect balance of hardness and toughness, the plasma-nitrided AlCrTiV HEA film has the lowest friction coefficient (against Al2O3) and the best wear-resistance. •Plasma nitriding was used to improve the microstructure of AlCrTiV and AlCrTiVSi HEA films.•N atoms are solidly dissolved to the BCC solid solution of AlCrTiV.•N atoms mainly react with metal elements in AlCrTiVSi to form V4.75Si3N0.58 phase.•Plasma nitriding leads to increased nano-hardness and improved tribological property.•Plasma-nitrided AlCrTiV HEA film has the lowest friction coefficient and the best wear-resistance.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2021.107195