等离子喷涂Ag/(Sn0.8La0.2)O2涂层的组织及电性能

金属学报, 2013, 49(3): 325-329. doi: 10.3724/SP.J.1037.2012.00599

等离子喷涂Ag/(Sn0.8La0.2)O2涂层的组织及电性能

付翀 ^1, , 王俊勃 ^2, , 杨敏鸽 ^3, , 侯锦丽 ^4, , 丁秉钧 ^5,

1.西安工程大学机电工程学院,西安,710048

2.西安工程大学机电工程学院,西安,710048

3.西安工程大学机电工程学院,西安,710048

4.西安工程大学机电工程学院,西安,710048

5.西安交通大学金属材料强度国家重点实验室,西安,710049

基金项目: National Natural Science Foundation of China(50834003) 国家自然科学基金重点项目50834003,陕西省教育厅专项科研计划项目11JK0808和西安工程大学博士启动基金项目BS1108资助 Specialized Research Fund for the Doctoral Program of Xi'an Polytechnic University(BS1108) Research Fund for Education Office of Shannxi of China(11JK0808)

关键词：等离子喷涂 , Ag/(Sn0.8La0.2)O2 , 触头合金 , 耐电压强度 , 电弧侵蚀

MICROSTRUCTURE AND ELECTRICAL PROPERTIES OF Ag/(Sn0.8La0.2)O2 COATING PREPARED BY PLASMA SPRAYING

Keywords： plasma spraying , Ag/(Sn0.8La0.2)O2 , contact material , breakdown strength , arc erosion

采用等离子喷涂技术在纯Cu表面制备了Ag/(Sn0.8La0.2)O2涂层,利用XRD和SEM对涂层的相结构和微观组织进行了分析,用拉伸法测定了涂层与基体的结合强度,通过电弧侵蚀实验测试了涂层的耐电压强度以及耐电弧侵蚀性能.结果表明,所得涂层结构均匀致密,与基体结合强度为18.8 MPa,涂层内纳米级(Sn0.8La0.2)O2颗粒均匀分布在Ag基体中;涂层的耐电压强度以及电弧烧蚀速率与块体合金接近,分别为3.76×107 V/m和37.7 μg/C;电弧侵蚀实验后,涂层表面阴极斑点分散,烧蚀轻微,其电弧侵蚀机制有从液态喷溅向蒸发侵蚀转变的趋势.

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