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田保红,程新乐,张 毅,刘 勇.放电等离子烧结Cu-Mo-WC复合材料电接触特性[J].稀有金属材料与工程(英文),2018,47(3):943~948.[Tian Bao-hong,Cheng Cin-le,Zhang Yi,Liu Yong.Study on Electrical ContactSCharacteristics of Cu-Mo-WC Composites Sintering by SparkSPlasmaSSintering Process[J].Rare Metal Materials and Engineering,2018,47(3):943~948.]
Study on Electrical ContactSCharacteristics of Cu-Mo-WC Composites Sintering by SparkSPlasmaSSintering Process
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Received:January 24, 2016  Revised:October 11, 2016
DOI:
Key words: Cu-Mo-WC composite  arc erosion  material transfer  contact resistance  welding force
Foundation item:国家自然科学基金资助(项目号51101052)
Author NameAffiliationE-mail
Tian Bao-hong 河南科技大学 bhtian007@163.com 
Cheng Cin-le 河南科技大学  
Zhang Yi 河南科技大学  
Liu Yong 河南科技大学  
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Abstract:
      The (Cu-50Mo)-0.5%LaCl3 and (Cu-50Mo)-5%WC-0.5%LaCl3 composites were prepared by spark plasma sintering (SPS) process. The density, hardness, electrical conductivity and microstructure of the composites were investigated respectively. The electrical contact test was carried out for both composites. The materials transfer direction and the anode, cathode mass change and the contact ends total mass change of the composites were studied under the condition of different DC and resistance load respectively. The morphologies after arc erosion were investigated by means of scanning electronic microscopy (SEM). The electrical erosive characteristics of the composites were analyzed. The results show that the composites have better comprehensive properties prepared by SPS method. The transfer mass increases with increase of electrical current density. The contact surface of the composites present the appearance characteristics with pores、molten pool and pits after arc erosion test. The surface arc erosion characteristics are much more obvious with increasing of current density. The contact resistance decreases with increasing of current. The contact resistance with the current changes has no obvious fluctuation, while the welding force increases with increase of current.