Size control of in situ formed reinforcement in metal melts-theoretical treatment and application to in situ (AlN + Mg2Si)/Mg composites

Size control of in situ formed reinforcement in metal melts-theoretical treatment and application to in situ (AlN + Mg2Si)/Mg composites
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金属熔体中原位形成增强体的尺寸控制-理论处理及其在原位(AlN Mg2Si)/Mg复合材料中的应用

DOI:
10.1016/j.compscitech.2009.08.011
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发表时间:
2009-12
影响因子:
9.1
通讯作者:
Cao, Wei
Cao, Wei
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhang, Congfa;Fan, Tongxiang;Ding, Jian;Zhang, Di;Cao, Wei

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提出了一种通过选择合金元素来控制金属熔体中原位生成增强体尺寸的方法。这种方法是基于合金化添加对扩展的Miedema模型和Wilson方程预测的增强体形核和扩散系数模型预测的增强体生长的影响。利用这种方法,合金元素的添加对(AlN+ Mg 2Si)/Mg复合材料中原位生成的Mg 2Si的尺寸的影响进行了评估。结果表明,Ti、V、Mo、Cr、Fe、Mn的添加能延缓Mg 2Si形核,促进Mg 2Si的生长; Ge、Sn、Cu、Zn的添加能促进Mg 2Si形核,阻碍Mg 2Si的生长。在理论预测的基础上,研究了添加Ti后(AlN+ Mg 2Si)/Mg合金的显微组织。
An approach of selecting alloying elements to control the size of in situ formed reinforcement in metal melts is proposed. This approach is based on the effect of alloying addition on nucleation of reinforcement predicted by the extended Miedema model and Wilson equation and on growth of reinforcement predicted by diffusion coefficient model. Using this approach, the effect of alloying element addition on the size of in situ formed Mg2Si in (AlN+Mg2Si)/Mg composites is evaluated. The results show that the addition of Ti, V, Mo, Cr, Fe and Mn can delay the nucleation and promote the growth of Mg2Si, while the addition of Ge, Sn, Cu and Zn can promote the nucleation and hinder the growth of Mg2Si. The microstructure of (AlN+Mg2Si)/Mg with the addition of Ti has been investigated based on the theoretical prediction.
DOI: --
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