Study of microstructure and phase of plasma sprayed Cr3C2-NiCr coating before and after the sparking plasma sintering
plasma sprayed chromium carbide coating has poor adhesion strength and wear-resistance, sparking plasma sintering(SPS) process can change the coating microstructure and improve its performance. The microstructure and phase of plasma sprayed Cr3C2-NiCr coating before and after the sparking plasma sintering were studied in this paper. The results show that the microstructure of plasma sprayed Cr3C2-NiCr coating after SPS become more compact and most of the pores and micro-cracks disappear. Some new oxides appear after SPS process. Hard Chromium carbides and oxides phase distribute in the NiCr-based solid solution to improve the wear resistance of the coating. Obvious crack at the interface has disappeared. The coating and the substrate form a good metallurgical bond.
Plasma spraying Chromium carbide Sparking plasma sintering Microstructure Metallurgical bond
Zhang Lei Hou Jin-bao
Chaoyang District, Beijing, 100024, China
国际会议
北京
英文
687-689
2012-10-23（万方平台首次上网日期，不代表论文的发表时间）