| Ce对耐热铝导体材料铸态组织和性能的影响 |
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| 引用本文： | 李红英,孙远,宾杰,刘洋,曹俊.Ce对耐热铝导体材料铸态组织和性能的影响[J].中南大学学报(自然科学版),2011(10). |
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| 作者姓名： | 李红英 孙远 宾杰 刘洋 曹俊 |
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| 作者单位： | 中南大学材料科学与工程学院; |
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| 基金项目： | 长沙市科技计划项目(K0802093-11) |
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| 摘 要： | 采用电阻率测试、硬度测试、金相显微镜和扫描电镜观察等方法,研究添加不同含量稀土Ce对铸态耐热铝导体材料Al-0.15Zr合金的影响。研究结果表明:Ce能净化基体,与杂质相形成金属间化合物,改变杂质相的形态和分布;添加适量的Ce,显著细化了晶粒和枝晶组织,有利于导电性和强度的提高;随着Ce加入量的增大,晶粒细化效果更好;当Ce含量(质量分数)超过0.3%以后,二次枝晶间距继续减小,但晶粒尺寸细化不明显;当Ce含量为0.3%和0.4%时,Al-0.15Zr合金的导电性和强度均达到最大值。
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| 关 键 词： | Ce 耐热铝导体 细化 电导率 铸态组织 |
Effect of cerium on as-cast microstructure and properties of heat-resistant aluminum conductor |
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| LI Hong-ying,SUN Yuan,BIN Jie,LIU Yang,CAO Jun.Effect of cerium on as-cast microstructure and properties of heat-resistant aluminum conductor[J].Journal of Central South University:Science and Technology,2011(10). |
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| Authors: | LI Hong-ying SUN Yuan BIN Jie LIU Yang CAO Jun |
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| Institution: | LI Hong-ying,SUN Yuan,BIN Jie,LIU Yang,CAO Jun (School of Materials Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | The microstructure and properties of as-cast heat-resistant Al-0.15Zr conductor with different amounts of Ce were studied by means of electrical resistivity measurement,hardness test,optical microscopy and scanning electrical microscopy.The results show that metallic compound containing Ce and impurity are congregated at the grain boundary and dendritic boundary,which is beneficial to the electrical conductivity and strength.Alloying of Ce refines the grain and dendrite of Al-0.15Zr alloy.The refine effect ... |
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| Keywords: | cerium heat-resistant aluminum conductor grain refinement electrical resistivity as-cast microstructure |
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