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中文摘要：
采用等离子喷涂技术在铜基体表面制备了Ag-SnO2涂层,应用XRD和SEM对涂层的相结构和微观组织进行了表征,通过拉伸和硬度试验测定了涂层的力学性能,并采用电弧侵蚀试验测试了涂层的耐电弧侵蚀性能。结果表明,所得涂层结构均匀致密,涂层内纳米级SnO2颗粒均匀分布在银基体中;涂层的力学性能和电弧侵蚀性能与块体合金接近;电弧侵蚀试验后,涂层表面阴极斑点分散,烧蚀轻微,表明所制备的Ag-SnO2涂层具有良好的耐电弧侵蚀特性。
英文摘要：
Ag-SnO2 coating on copper substrate has been prepared by an atmospheric plasma spraying method using high energy ball milled Ag-12wt%SnO2 composite powder as raw material. The microstructures of the Ag-SnO2 coating were characterized by XRD and SEM. The mechanical properties and arc erosion performance of the as sprayed coating have been determined by tensile test, microhardness and arc erosion tests, respectively. The results show that the Ag-SnO2 coating presents a compact microstructure, and the nanosized SnO2 particles are uniformly dispersed in the Ag matrix of the coating. The mechanical properties and the arc erosion performance of the Ag-SnO2 coating are close to those of Ag-SnO2 bulk. After arcing test, the surface of the coating presents the dispersion of cathode spots and a little erosion, indicating that the Ag-SnO2 coating has excellent arc-erosion resistance. Plasma spray technique is an effective approach to manufacture Ag-SnO2 contact coating with good mechanical properties and arc erosion resistance.
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