Vacuum arc characteristics on nanocrystalline CuCr alloys |
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| Authors: | Zhimao Yang Qiuli Zhang Chengyu Zhang |
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| Affiliation: | a Department of Materials Physics, School of Science, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China
b State Key Laboratory for Mechanicals Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China |
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| Abstract: | Vacuum arcs generated on nanocrystalline CuCr5 alloys were observed by a digital high-speed video camera. Experimental results show that nanosized Cr particles have strong influence on arc characteristics. The arcs are much more stable on nanocrystalline CuCr5 alloys and the chopping current is about 0.8 A, which is much lower than that on coarse crystalline CuCr5 alloys. Spots can directionally move a long distance on nanocrystalline CuCr alloy whereas the spot motion is totally random walk on Cr particles for coarse crystalline CuCr alloy. |
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| Keywords: | 52.80.Vp 52.25.Mq 81.07.Bc |
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