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叶志国,何庆庆.处理温度对电沉积银石墨复合镀层接触电阻的影响[J].稀有金属材料与工程(英文),2017,46(12):3989~3993.[yezhiguo and 何庆庆.The effect of treatment temperature on the contact resistance of electro-deposition silver-graphite composite coating[J].Rare Metal Materials and Engineering,2017,46(12):3989~3993.]
The effect of treatment temperature on the contact resistance of electro-deposition silver-graphite composite coating
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Received:October 10, 2015  Revised:June 20, 2016
DOI:
Key words: high voltage switch  treatment temperature  silver graphite composite coating  contact resistance
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
yezhiguo and 何庆庆  
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Abstract:
      In this paper, the fine silver, silver-graphite and fine silver/silver graphite composite coatings were prepared on copper substrate by the electro-deposition method. The influence of treatment temperature on the contact resistance of three types of composite coating was particularly investigated. At room temperature, the contact resistance of the composite coatings has lower than that of the fine silver coating under the same torque. After heat treatment from 25 ℃ to 240 ℃, there are no significant differences of contact resistance for three types of coating. With the increase of treatment temperature from 240 ℃ to 600 ℃, the contact resistance of the fine silver coating and silver/silver-graphite composite coating gradually increased, and achieved the values of 54.3 μΩ and 42.6 μΩ under the 5 N m torque, respectively. However, the contact resistance of the silver-graphite composite coating rapidly increased with treatment temperature from 240 ℃ to 600 ℃, and achieved the values of 125.5 μΩ at 480 ℃ with the phenomenon of serious desquamate on the coating surface.