High temperature tribological properties of the high-hardness wear-resistant Cu-Ni-Al-Sn coatings produced by laser cladding

被引：12
作者：
Chen, Zhiming [1 ,2 ]
Tan, Hui [1 ]
Sun, Qichun [1 ]
Chen, Wenyuan [1 ]
Zhu, Shengyu [1 ,2 ]
Cheng, Jun [1 ,2 ,3 ]
Yang, Jun [1 ,2 ,3 ]
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
[3] Shandong Lab Adv Mat & Green Mfg Yantai, Yantai 264000, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2024年 / 196卷
关键词：
Cu-Ni-Al-Sn coatings; Laser cladding; High temperature; Wear mechanism; BEHAVIOR; FRICTION; ALLOY;
D O I：
10.1016/j.triboint.2024.109645
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The high-hardness wear-resistant Cu-Ni-Al-Sn coatings were fabricated by laser cladding, and the effect of Sn content on the microstructure, hardness and high temperature tribological behaviors of the coatings was investigated. The results revealed that the hardness of the coatings increased from 177.6 to 674.0 HV0.3 due to the strengthening of Cu9NiSn3, FeNi and NiSn precipitations. In addition, Sn plays an important role in improving the high temperature tribological properties of the coatings. At 25-200 degrees C, Sn can form a low shear-stress film to reduce the friction coefficient and wear rate. When the temperature exceeds 300 degrees C, a tribo-oxides layer containing SnO2, CuO and Fe2O3 forms on worn surfaces, which play a role in improving the tribological properties.
引用
收藏
页数：12
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