Effect of silver vanadate on the lubricating properties of NiCrAlY laser cladding coating at elevated temperatures

被引：32
作者：
Xin, Benbin [1 ,2 ]
Yu, Youjun [1 ]
Zhou, Jiansong [1 ]
Wang, Lingqian [1 ]
Ren, Shufang [1 ]
Li, Zhen [1 ]
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：
SURFACE & COATINGS TECHNOLOGY | 2016年 / 307卷
基金：
中国国家自然科学基金;
关键词：
NiCrAlY based composites; Tribological properties; Elevated temperature; Lubrication mechanism; Synergistic lubricating effect; TRIBOLOGICAL PROPERTIES; NANOCOMPOSITE COATINGS; FRICTION; BEHAVIOR; COMPOSITES; FILMS;
D O I：
10.1016/j.surfcoat.2016.08.063
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Self-lubricating coating NiCrAlY/Cr3C2 (NiCr)/V2O5/Ag2O was prepared by laser cladding. Two different kinds of contrast samples were prepared in order to verify the excellent tribological properties of the composite coating. The composition and microstructure of the composite coating were characterized by X-ray diffractometry, scanning electron microscopy with energy spectrum analyzer (SEM-EDS). The tribological behavior of the coating from 25 degrees C to 800 degrees C was evaluated by a ball-on-disk tribometer and dual-mode 3D surface profiler, the corresponding wear mechanism of the composite coating was investigated by Raman spectroscopy. It has been found that the composite coating shows better tribological properties than the compared coatings when the temperature higher than 400 degrees C, the friction coefficient of composite coating was 0.143 and the wear rate was 2.86 x 10(-5) mm(3)/Nm at 800 degrees C. All these can be attributed to formation of the self-lubricant Ag3VO4 and AgVO3 with lamella structure on the worn surface. The wear mechanism of the composite coating is dominated by plastic deformation, delamination and adhesive wear at elevated temperature. (C) 2016 Published by Elsevier B.V.
引用
收藏
页码：136 / 145
页数：10
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