Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 45, Issue 11, Pages 5647-5654Publisher
SPRINGER
DOI: 10.1007/s11664-016-4782-0
Keywords
CuCr-W-C; vacuum switch; low contact pressure; anti-welding
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Funding
- National Science Foundation of China [51171146, 51101177]
- Program for Key Science and Technology Innovative Research Team of Shaanxi Province [2013KCT-05]
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Insufficient anti-welding properties limit the application of Cu-Cr contact material in vacuum switches with low contact pressure. The CuCr-W-C alloys that are prepared are for decreasing welding tendencies and keeping the voltage withstand by addition of W and C elements. It is found that the average welding force of CuCr-W-C alloys is reduced more than 50% compared with that of the Cu-50 Cr-50 alloy. Especially for CuCrW3.0C0.3 and CuCrW1.0C0.5, the welding forces reduce to only 10% of Cu50Cr50. Arc erosion areas of CuCr-W-C alloys are enlarged by five times more than that of the Cu50Cr50 alloy in the same arcing conditions. The results of type tests were qualified. The results suggested that the CuCrW2.0C1.0 alloy could be used in vacuum switches with low contact pressure to replace the W-Cu type contacts.
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