Microstructure and hardness characterization of a NiCr/Cr3C2 coating by high-velocity oxy-fuel thermal spraying
A NiCr/Cr3C2 composite coating with a thickness of approximately 200 μm was deposited onto 1Cr18Ni9Ti stainless steel substrate by high-velocity oxy-fuel (HVOF) thermal spraying. Microstructure of the coating was characterized using X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscopy (TEM). The coating comprised a NiCr matrix and two types of carbides. The NiCr matrix was composed of an amorphous phase and nanocrystalline grain with a size of 10–50 nm. The microhardness of the coating was found to be 1200Hv, which is significantly greater than that of the stainless steel (1Cr18Ni9Ti) substrate (285 Hv).
HVOF thermal spraying nanocrystalling grain NiCr/Cr3C2 coating
Yuping Wu Gaiye Li
School of Materials Science and Engineering, Hohai University, Xikang Road 1,Nanjing 210098,China
国际会议
青岛
英文
397-400
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）