| 稀土元素对铜-铬触头材料显微组织和电击穿性能的影响 |
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| 引用本文： | 李晓燕,王顺兴,田保红. 稀土元素对铜-铬触头材料显微组织和电击穿性能的影响[J]. 机械工程材料, 2008, 32(11) |
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| 作者姓名： | 李晓燕 王顺兴 田保红 |
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| 作者单位： | 河南科技大学材料科学与工程学院; |
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| 基金项目： | 河南省杰出青年基金资助项目(6521002700); 河南省高校创新人才培养工程资助项目(豫教高2005-126) |
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| 摘 要： | 对加入不同含量稀土元素(RE)的铜-铬触头材料在10 Pa真空条件下的电击穿性能进行了研究;通过对比不同稀土元素含量铜-铬触头材料的显微组织和电击穿前后硬度值的变化,分析了铜-铬触头材料的击穿机理。结果表明:稀土元素的加入能显著细化晶粒,并能提高材料的耐电压强度,加入质量分数为0.20%RE比加入0.06%RE更能细化铜-铬合金晶粒,其耐电压强度和硬度的提高也更明显;稀土元素的加入有利于电弧的熄灭。
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| 关 键 词： | 铜-铬合金 稀土 电击穿 |
Effect of Rare Earth on Microstructure and Electrical Breakdown Properties of Cu-Cr Alloys |
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| LI Xiao-yan,WANG Shun-xing,TIAN Bao-hong. Effect of Rare Earth on Microstructure and Electrical Breakdown Properties of Cu-Cr Alloys[J]. Materials For Mechanical Engineering, 2008, 32(11) |
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| Authors: | LI Xiao-yan WANG Shun-xing TIAN Bao-hong |
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| Affiliation: | LI Xiao-yan,WANG Shun-xing,TIAN Bao-hong(Henan University of Science , Technology,Luoyang 471003,China) |
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| Abstract: | The electrical breakdown properties of Cu-Cr contact materials with different RE content under 10 Pa vacuum condition were studied.Breakdown mechanism of Cu-Cr contact materials with different RE content were analyzed through comparing the variation of microstructure and hardness.The results show that RE can make the grain finer and increase the dielectric strength.0.20%RE addition made the grain finer than 0.06%RE did and increased the dielectric strength and hardness more obviously,so 0.20%RE addition mad... |
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| Keywords: | Cu-Cr alloy rare earth electrical breakdown |
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