The microstructure and tribological properties of liquid-fuel HVOF sprayed nanostructured WC-12Co coatings

被引：37
|
作者：
Zorawski, Wojciech [1 ]
机构：
[1] Kielce Univ Technol, Kielce, Poland
来源：
SURFACE & COATINGS TECHNOLOGY | 2013年 / 220卷
关键词：
WC-12Co; HVOF; Nanostructure; COF; Wear; WC-CO COATINGS; MECHANICAL-PROPERTIES; WEAR-RESISTANCE; POWDERS; DEPOSITION; CARBIDE;
D O I：
10.1016/j.surfcoat.2012.11.007
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A nanostructured WC-12Co composite coating was prepared by applying the liquid-fuel HVOF spray technique. The microstructure and composition of tungsten carbide nanopowder were analyzed with a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The investigations revealed that the sizes of the original particles were in the range of 50-500 nm. The nanostructured coatings had denser structure and higher hardness than the conventional coating. The content of W2C, WC1-x, W and of amorphous phase was also smaller. The coefficient of friction for the HVOF-sprayed nanostructured WC-12Co coating was four times lower than that for the conventionally sprayed WC-12Co coatings. Finally, the nanostructured coating showed higher abrasive resistance than the conventionally sprayed coatings. (C) 2012 Elsevier B.V. All rights reserved.
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页码：276 / 281
页数：6
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