Microstructure and sliding wear behavior of pseudo-alloy PS45/CuA18 composite coating sprayed by HVAA technique

稀有金属（英文版）, 2012, 31(2): 204-208. doi: 10.1007/s12598-012-0492-9

^1, , ^2, , ^3, , ^4, , ^5, , ^6, , ^7, , ^8,

1.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

2.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

3.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

4.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

5.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

6.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

7.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

8.Optoelectronic Engineering Department, Zhongshan Torch Polytechnic, Zhongshan 528436, China

Microstructure and sliding wear behavior of pseudo-alloy PS45/CuA18 composite coating sprayed by HVAA technique

WU Yaosha ^1, , ZENG Dechang ^2, , LIU Zhongwu ^3, , QIU Wanqi ^4, , YU Hongya ^5, , ZHONG Xichun ^6, , LI Shangzhou ^7, , MA Yuexin ^8,

1.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

2.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

3.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

4.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

5.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

6.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

7.School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China

8.Optoelectronic Engineering Department, Zhongshan Torch Polytechnic, Zhongshan 528436, China

Keywords： surface science

A pseudo-alloy PS45/CuAl8 composite coating was sprayed on steel substrate by high-velocity activated arc spraying (HVAA) process. Its sliding wear behavior at room temperature was evaluated by M-2000 wear tester. For comparison, a single CuAl8 coating was also prepared and tested under the same conditions. It is found that the pseudo-alloy composite coating consists of α-Cu and γ-Ni metallic matrix phases together with homogenously distributed minor A12O3, Cr2O3 oxide phases. Moreover, pseudo-alloy coating possesses much better sliding wear resistance than CuA18 coating due to the enhanced hardness and microstructural homogenization. Fatigue wear and abrasive wear are responsible for the wear-down mechanism of the pseudo-alloy coating.

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