Microstructure of the Ce-modified in situ Mg2Si/Al–Si–Cu composite
Microstructure of the Ce-modified in situ Mg2Si/Al–Si–Cu composite
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DOI：
10.1016/j.jallcom.2004.08.003
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发表时间：
2005-03
影响因子：
6.2
通讯作者：
Y. Zhao;Q. Qin;W. Zhou;Y. Liang
中科院分区：
文献类型：
--
作者：
Y. Zhao;Q. Qin;W. Zhou;Y. Liang
研究了Ce对自生Mg 2Si/Al-Si-Cu复合材料中初生相和共晶相Mg 2Si的影响。结果表明，随着Ce含量的增加，初生Mg 2Si颗粒的形貌由枝晶状或不规则状向多边形转变，其尺寸由100 μm减小到15μm，再增大到30μm。共晶Mg 2Si相由片状转变为柱状，共晶Si相转变为珊瑚状。此外，少量的富Ce化合物的形式的Al 7Si 3.5Cu 3.5Ce 1形成作为结果的添加。
The effect of Ce on primary and eutectic Mg2Si phases in in situ Mg2Si/Al–Si–Cu composite is investigated. The results show that, with the increasing of Ce content, the morphology of primary Mg2Si particulate changed from dendritic or irregular to polygonal shape, and its size decreases from ∼100 to ∼15μm and then increases to ∼30μm. The eutectic Mg2Si phase changed from flake-like to chrysanthemum-like, and eutectic Si changed to coral-like morphology. Furthermore, a small amount of Ce-rich compounds in the form of Al7Si3.5Cu3.5Ce1are formed as a result of Ce additions.