Tribological properties of laser cladding NiAl intermetallic compound coatings at elevated temperatures

被引：54

作者：

Yu, Youjun ^{[1
]}

Zhou, Jiansong ^{[1
]}

Ren, Shufang ^{[1
]}

Wang, Lingqian ^{[1
]}

Xin, Benbin ^{[1
,2
]}

Cao, Silong ^{[1
,2
]}

机构：

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

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2016年 / 104卷

基金：

中国国家自然科学基金;

关键词：

NiAl intermetallics coating; Laser cladding; Tribological properties; Wear mechanism; OXIDATION BEHAVIOR; MICROSTRUCTURE; WEAR; NANOPARTICLES; TRANSITION; FRACTURE;

D O I：

10.1016/j.triboint.2016.09.014

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Tribological properties, phase compositions and wear mechanisms of laser cladding NiAl coating were investigated from room temperature to 1000 degrees C under air atmosphere environment. The results showed that a glaze layer composed of NiO, Ni2O3, Al2O3 and NiAl2O4 phases as well as Ni3Al phase were formed on worn surface under high temperature, which act as a solid lubricant and anti-wear material improving the tribological properties of NiAl coating at elevated temperatures. The wear mechanism is dominated by abrasive wear below 500 degrees C, and transforms to plastic deformation and adhesive wear at 500 degrees C up to 700 degrees C and oxidation wear at 900 degrees C and above, owing to formation of new oxide phase during tribochemical reaction.

引用

页码：321 / 327

页数：7

共 27 条

[1] Al-Ni intermetallics obtained by SHS;: A time-resolved X-ray diffraction study [J].