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直流條件下W-15wt%Cu電接觸材料燃弧特性研究
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國(guó)家自然科學(xué)基金 (51064016)；云南省教育廳科學(xué)研究基金 (08Y0055)；昆明市科技計(jì)劃重點(diǎn)項(xiàng)目資助 (昆科計(jì)字08H130102)


Arc Erosion Characteristics of W-15wt% Cu Electric Contact Materials
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    摘要:

    研究了W-15wt%Cu電接觸材料在直流條件電弧作用下電極表面元素分布、材料微觀(guān)組織形貌；探討了電接觸材料在直流電弧作用下的轉(zhuǎn)移和腐蝕機(jī)理。結(jié)果表明：直流電弧引起陽(yáng)極表面熔化、Cu離子向陰極轉(zhuǎn)移并在陰極表面沉積；金屬氧化物在電弧高溫作用下分解成單元素，吸收了電弧能，有利于滅??；同時(shí)W顆粒懸浮在陽(yáng)極Cu微小熔池中，增加了熔融Cu的粘度，有利于降低Cu熔滴的飛濺，減少了電弧燒損。W-15wt%Cu復(fù)合電接觸材料顯示出良好的綜合電性能

    Abstract:

    The element distribution in electrode surface, the microstructure and morphology of the W-15wt%Cu electric material were studied under DC condition. The transformation and erosion mechanism of the material in the DC arc was discussed. The results show that the DC arc causes the melting of the surface in anode, the transferring of copper ion and depositing on the cathode surface. The deposition of copper in cathode surface reduces the contact resistance. The decomposition of metal oxide is helpful to extinguish arc by absorbing the arc energy. Meanwhile the particles of W suspend in the melt pool which will increase the viscosity of the melt Cu and help to reduce the splash of melt drop and arc erosion. The W-15wt% Cu contact material shows better performance under DC condition compared to the other materials

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韓 波,史慶南,謝 明,陳亮維,王效琪,起華榮,孟慶猛.直流條件下W-15wt%Cu電接觸材料燃弧特性研究[J].稀有金屬材料與工程,2012,41(6):994~997.[Han Bo, Shi Qingnan, Xie Ming, Chen Liangwei, Wang Xiaoqi, Qi Huarong, Meng Qingmeng. Arc Erosion Characteristics of W-15wt% Cu Electric Contact Materials[J]. Rare Metal Materials and Engineering,2012,41(6):994~997.]
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  • 收稿日期:2011-06-08
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