Tribological properties and wear mechanisms of TixVNbTaWy RHEAs sliding against Si3N4 ceramic balls: The effects of Ti and W contents

被引：28

作者：

You, Xin ^{[1
,2
]}

Song, Junjie ^{[2
]}

Lin, Pengyu ^{[1
,2
]}

Zhang, Xiaoyu ^{[2
,3
]}

Su, Yunfeng ^{[2
]}

Wang, Haifeng ^{[1
]}

Zhang, Yongsheng ^{[2
]}

Hu, Litian ^{[2
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc Ctr Adv Lubricat &, Xian 710072, Peoples R China

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

[3] Yantai Zhongke Res Inst Adv Mat & Green Chem Engn, Yantai 264006, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2022年 / 175卷

基金：

中国国家自然科学基金;

关键词：

Refractory high-entropy alloys; High temperature; Mechanical properties; Wear-resistance; CENTERED-CUBIC TITANIUM; HIGH ENTROPY ALLOY; HIGH-TEMPERATURE; OXIDATION; BEHAVIOR; STRENGTH;

D O I：

10.1016/j.triboint.2022.107801

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Three new TixVNbTaWy RHEAs with different contents of Ti and W were prepared by mechanical mixing and spark plasma sintering. The effects of Ti and W contents on the mechanical and tribological properties were explored, with a focus on the wear mechanisms of the alloys sliding against Si3N4 ceramics from room temperature to 900 degrees C. The results showed that all three alloys exhibited high compressive strength and plastic strain of > 12% at room temperature. More crucially, the wear rate of the optimized alloy can be as low as 6.8 x 10(-6) mm3/(N.m) at 600 degrees C. Friction-induced subsurface strengthening and the formation of continuous oxide films and plastic deformation layers played an important role in reducing the wear rate.

引用

页数：16

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