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满田囡,张林,项兆龙,王文斌,黄明浩,王恩刚.Al-Bi-Ce-Cu难混溶合金的凝固组织和耐磨性[J].稀有金属材料与工程(英文),2018,47(12):3716~3720.[Man Tiannan,Zhang Lin,Xiang Zhaolong,Wang Wenbin,Huang Minghao and Wang Engang.The microstructure and wear resistance of Al-Bi-Ce-Cu immiscible alloys[J].Rare Metal Materials and Engineering,2018,47(12):3716~3720.]
The microstructure and wear resistance of Al-Bi-Ce-Cu immiscible alloys
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Received:March 29, 2017  Revised:June 13, 2017
DOI:
Key words: Immiscible alloys  heterogeneous nucleation  Microstructure  wear resistance
Foundation item:国家自然科学(51674083),国家自然科学资助(项目号50901019),高等学校学科创新引智计划项目资助(项目号B07015)
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Man Tiannan,Zhang Lin,Xiang Zhaolong,Wang Wenbin,Huang Minghao and Wang Engang  
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Abstract:
      Immiscible alloys have been investigated as a kind of alloys with special metallurgy characteristics. Liquid phase separation of Al-Bi immiscible alloys has been investigated for decades. In this work, the microstructure and the wear resistance of Al-Bi-Ce-Cu alloys were investigated. The intermetallic compounds Bi2Ce form and act as heterogeneous nucleation sites of Bi-rich droplets, which promote the nucleation of Bi phase and obtain a dispersed microstructure. The intermetallic compound Al2Cu locate in the Al-rich matrix and enhance the hardness of matrix. The wear resistance of alloys is not only dependent on the size of Bi-rich droplets but also dependent on the hardness of matrix. The refined microstructure and the strengthened hardness improve the wear resistance of Al-Bi alloys. Therefore, Al-Bi-Ce-Cu immiscible alloys is useful as a wear resistance material.