Microstructure and sliding wear behavior of pseudo-alloy PS45/CuAl8 composite coating sprayed by HVAA technique |
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| Authors: | Yaosha Wu Dechang Zeng Zhongwu Liu Wanqi Qiu Hongya Yu Xichun Zhong Shangzhou Li and Yuexin Ma |
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| Affiliation: | School of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China b Optoelectronic Engineering Department, Zhongshan Torch Polytechnic, Zhongshan 528436, China |
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| Abstract: | 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 Al2O3, Cr2O3 oxide phases. Moreover, pseudo-alloy coating possesses much better sliding wear resistance than CuAl8 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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| Keywords: | surface science HVAA pseudo-alloy composite coating PS45/CuAl8 sliding wear microstructure |
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