Tribological performance of a cost-effective CrFeNiAl0.3Ti0.3 high entropy alloy based self-lubricating composite in a wide temperature range

被引：60

作者：

Nguyen, Cuong ^{[1
]}

Tieu, Anh Kiet ^{[1
]}

Deng, Guanyu ^{[1
]}

Wexler, David ^{[1
]}

Vo, Tri Dinh ^{[1
]}

Wang, Long ^{[1
,2
]}

Yang, Jun ^{[3
]}

机构：

[1] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2500, Australia

[2] Northwestern Polytech Univ, Ctr Adv Lubricat & Seal Mat, State Key Lab Solidificat Proc, Xian 710021, Shaanxi, Peoples R China

[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Gansu, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2022年 / 174卷

基金：

中国国家自然科学基金;

关键词：

High entropy alloys; Solid-lubricating composites; Friction and wear; Nanoindentation; High temperature; WEAR BEHAVIOR; MECHANICAL-PROPERTIES; MICROSTRUCTURE; FRICTION; DUCTILITY; PROPERTY; COATINGS; OXIDES;

D O I：

10.1016/j.triboint.2022.107743

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A cost-effective HEA based self-lubricating composite was fabricated using CrFeNiAl0.3Ti0.3 as matrix and Ag as solid lubricant by hot pressing sintering (HPS), with Ag particles uniformly dispersed along grain boundaries of HEA matrix. Tribological tests revealed a remarkable impact of Ag tribo-film in reducing coefficient of friction and wear of the composites, from RT to 600 degrees C. 750 degrees C was a turning point for the change in wear mechanism from abrasive to oxidative wear. The formation of a subsurface tribo-layer and a protective oxide layer on the worn surface of CrFeNiAl0.3Ti0.3 HEA led to low wear. At 900 degrees C, associated with the absence of subsurface tribo-layer, Ag is not found in the oxide layer, causing an increase in the wear of composite.

引用

页数：18

共 71 条

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