Mechanical and Tribological Properties of Plasma-Sprayed Cr3C2-NiCr, WC-Co, and Cr2O3 Coatings

被引：47

作者：

Li J. ^{[1
]}

Zhang Y. ^{[1
]}

Huang J. ^{[1
]}

Ding C. ^{[1
]}

机构：

[1] Shanghai Institute of Ceramics, Chinese Academy of Sciences, 200050 Shanghai

来源：

Journal of Thermal Spray Technology | 1998年 / 7卷 / 2期

关键词：

Cr[!sub]2[!/sub]O[!sub]3[!/sub; Cr[!sub]3[!/sub]C[!sub]2[!/sub]-NiCr; Fracture toughness; Tribological property; WC-Co; Young's modulus;

D O I：

10.1361/105996398770350981

中图分类号：

学科分类号：

摘要：

Mechanical properties such as Young's moduli and fracture toughness of plasma-sprayed Cr3C2-NiCr, WC-Co and Cr2O3 coatings were measured. The tribological properties of the three kinds of coatings were investigated with a block-on-ring self-mated arrangement under water-lubricated sliding. Furthermore, the influences of the mechanical properties on the tribological properties of the coatings were also examined. It was found that the Young's moduli, bend strengths and fracture toughness of the coatings were lower than the corresponding bulk materials, which may be attributed to the existence of pores and microcracks in the coatings. Among the three kinds of coatings, the magnitude of wear coefficients, in decreasing order, is Cr3C2-NiCr, WC-Co and Cr2O3, and the wear coefficient of Cr2O3 coating was less than 1 × 10-6 mm3N-1m-1. The wear mechanisms of the coatings were explained in terms of microcracking and fracturing, and water deteriorated wear performance of the coatings. The higher the fracture toughness and the lower the porosity and length of microcracking of the coating, the more the wear-resistance of the coating.

引用

页码：242 / 246

页数：4

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