Effects of Ni-5 wt% Al/Bi2O3 addition and heat treatment on mechanical and tribological properties of atmospheric plasma sprayed Al2O3 coating

被引：8

作者：

Sun, Huwei ^{[1
]}

Yi, Gewen ^{[1
,2
]}

Wan, Shanhong ^{[1
,2
]}

Chen, Juanjuan ^{[1
]}

Xin, Benbin ^{[1
]}

Wang, Wenzhen ^{[1
]}

Shan, Yu ^{[1
]}

Wen, Yina ^{[1
]}

机构：

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

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2023年 / 472卷

基金：

中国国家自然科学基金;

关键词：

Atmospheric plasma spraying; Tribological behavior; NiBi intermetallic compound; Mechanical property; WEAR BEHAVIOR; TRIBOFILM FORMATION; ALUMINA; CERAMICS; FRICTION;

D O I：

10.1016/j.surfcoat.2023.129935

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To solve the problem of high friction and wear of the plasma sprayed Al2O3 coating in a wide temperature range, two Al2O3-based composite coatings, namely Al2O3-(NiAl-Bi2O3) coating and Al2O3-(NiAl-Bi2O3)-H coating (heat treatment), were prepared by involving Ni-5 wt% Al and Bi2O3, and applying a simple heat treatment. Compared to the Al2O3 coating, two Al2O3-based composite coatings attained increased toughness and adhesive strength. In particular, heat treatment endowed Al2O3-(NiAl-Bi2O3)-H coating with improved compositional homogeneity and more NiBi intermetallic compound and & alpha;-Al2O3 phases. In terms of tribological behavior, when subjected to rubbing against the counterpart Al2O3 ball, Bi2O3 and NiBi were shown to have good lubricating properties, and they exerted friction-reducing and anti-wear effects in both Al2O3-based composite coatings at 25 and 400 degrees C, respectively. At 800 degrees C, under the action of thermo-mechanical coupling, a tribo-oxide layer composed of multiple oxides (Al2O3, Bi2O3, NiO and Bi2Al4O9) was generated on the worn surface of the two composite coatings, achieving the excellent lubrication and wear-resistance.

引用

页数：12

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