| Study on the failure mechanism of Ag-Ce contacts in DC level |
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| 作者姓名： | MENG Fan-bin LU Jian-guo LU Ning-yi CHEN Zhi-chao CHEN Qi |
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| 作者单位： | 1School of Materials Science and Engineering，Hebei University of Technology，Tianjin 300130，China |
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| 摘 要： | Nominal contact resistance, minimum erosion and material transfer are required with low cost materials working in a wide currents range for DC relays. Ag-Ni contact materials have low contact resistance, but the erosion and material transfer are large at high current level. Ag-SnO2 contact materials have good anti-welding properties and resistance to arc erosion, but they have large contact resistance during working and are easily block SnO2 from flocking together on the surface at low current level. In this paper, the failure mechanisms of Ag-Ce contact material were studied. The surface morphologies of the contacts after electrical endurance test for Ag-Ce contact material were compared with that of Ag-Ni and Ag-SnO2 contact materials. The effect of Ce on the surface morphologies of the contacts after electrical endurance test was analyzed.
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| 关 键 词： | 继电器 电接触 失效分析 电子技术 |
| 收稿时间： | 2006-12-19 |
| 修稿时间： | 2007-01-05 |
Study on the failure mechanism of Ag-Ce contacts in DC level |
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| MENG Fan-bin LU Jian-guo LU Ning-yi CHEN Zhi-chao CHEN Qi.Study on the failure mechanism of Ag-Ce contacts in DC level[J].Journal of Zhejiang University Science,2007,8(3):449-452. |
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| Authors: | Meng Fan-bin Lu Jian-guo Lu Ning-yi Chen Zhi-chao Chen Qi |
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| Institution: | (1) School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China;(2) Hongfa Electroacoustic Co., Ltd, Xiamen, 361021, China |
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| Abstract: | Nominal contact resistance, minimum erosion and material transfer are required with low cost materials working in a wide currents range for DC relays. Ag-Ni contact materials have low contact resistance, but the erosion and material transfer are large at high current level. Ag-SnO2 contact materials have good anti-welding properties and resistance to arc erosion, but they have large contact resistance during working and are easily block SnO2 from flocking together on the surface at low current level. In this paper, the failure mechanisms of Ag-Ce contact material were studied. The surface morphologies of the contacts after electrical endurance test for Ag-Ce contact material were compared with that of Ag-Ni and Ag-SnO2 contact materials. The effect of Ce on the surface morphologies of the contacts after electrical endurance test was analyzed. |
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| Keywords: | Relays Electric contact Failure analysis |
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