Effect of WC and CeO2 on microstructure and properties of W–Cu electrical contact material

Yang, Xiaohong; Liang, Shuhua; Wang, Xianhui; Xiao, Peng; Fan, Zhi Kang

doi:10.1016/j.ijrmhm.2009.11.009

Cited by 108 publications

(39 citation statements)

References 14 publications

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“…Cu is a good candidate material due to its high thermal and electrical conductivity, but it has a high coefficient of thermal expansion (CTE). Materials with low CTE and high thermal conductivity, such as Cu/CorCu/W composites, have improved the reliability of electronic devices [66,67]. However, these composites are often too expensive for many applications.…”

Section: Cu/cnt Contact Materials Prepared By Ccementioning

confidence: 99%

Research and Application of CNT Composite Electroplating

Wang¹,

Deng²,

Cui³

et al. 2011

Carbon Nanotubes - From Research to Applications

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Section: Cu/cnt Contact Materials Prepared By Ccementioning

confidence: 99%

Research and Application of CNT Composite Electroplating

Wang¹,

Deng²,

Cui³

et al. 2011

Carbon Nanotubes - From Research to Applications

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“…SIEMENS originally developed silver‐graphite composite contact materials for the disconnector. Compared with the silver coating, silver graphite composite exhibits better wear resistance and lower contact resistance . The mechanical life of silver coating and silver‐graphite composite coating for disconnector have been compared by Yang et al The results showed that the mechanical endurance of silver‐graphite composite coating was more than 5000 times longer than Ag coating.…”

Section: Introductionmentioning

confidence: 99%

Feasible preparation and improved properties of Ag‐graphite composite coating for switch contact by cyanide‐free electrodeposition

Chen

Zheng

et al. 2018

Materials & Corrosion

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A cyanide‐free electrodeposition system was employed to prepare Ag‐graphite composite coatings on Cu substrate for switch contact. The effects of graphite concentration, current density, stirring speed, and plating temperature on the thickness and quality of the composite coating were investigated. The feasibility of cyanide‐free electrodeposition for Ag‐graphite composite was confirmed and the optimized conditions were determined. The growth mechanism of the composite coating was also analyzed. The properties of the composite coating were also investigated compared with Cu substrate and Ag coating. The results show that the Ag‐graphite composite coating has the lowest friction coefficient, moderate corrosion resistance, and relatively low contact resistance. The present results indicate that Ag‐graphite composite coating prepared by cyanide‐free electrodeposition is suitable for disconnector coating.

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“…Strong arcs can easily form and accumulate on the contact surface, affecting the normal operation of the switch. Therefore, the behavior of the arc ablation of the contact materials is a critical property for the operation safety and reliability of high voltage electrical equipments [8] contact materials in order to achieve a better ablation resistance and prolong service life of the switches, those are through low voltage grade to simulate arc ablation or after analyzing to get related failure mechanism, and by changing the contacts' structure design and usage environment to meet the conditions of usage [9][10][11]. In this paper, the contact materials in opening and closing moment arc producing and extinguishing was simulated by different voltage grade.…”

Section: Introductionmentioning

confidence: 99%

Investigation and analysis of arc ablation on WCu electrical contact materials

Chen

Dong

Zhang

et al. 2016

J Mater Sci: Mater Electron

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In this paper, arc ablation behavior of tungstencopper (WCu) alloy contacts was investigated by the measurement of weight-loss, or erosion rate, and microstructures of tungsten-copper alloy contacts were examined by using scanning electron microscopy after electrical breakdown process. Experimental results showed that the arc erosion process started at the tiny sharp edges, then the arc spreaded on the second phases, or copper phase on the surface. Because of electrons/ions bombardment, the rapid evaporation and sputtering of liquid copper droplets were serious. As a result, an even contact surface became rugged, and tungsten skeleton remained because of being less eroded. With the increase of applied breakdown voltage, the ablation of tungsten-copper alloy became more significant. The WCu alloys with a higher content of copper showed more severe erosion rate as compared with that with a higher tungsten content under the same erosion conditions. Furthermore, when the number of breakdown is less, WCu alloys with a high copper content are easier for erosion for the conditions of fewer numbers of breakdowns. Whereas, WCu alloys with a high content of tungsten are easier for ablation for the conditions with many times of arc breakdown.

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Effect of WC and CeO2 on microstructure and properties of W–Cu electrical contact material

Cited by 108 publications

References 14 publications

Research and Application of CNT Composite Electroplating

Research and Application of CNT Composite Electroplating

Feasible preparation and improved properties of Ag‐graphite composite coating for switch contact by cyanide‐free electrodeposition

Investigation and analysis of arc ablation on WCu electrical contact materials

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