Modification of Al-Si Microstructure - The Al-Si-Sr Phase Diagram from 0–20 WT. % Si and 0–5.0 WT. % Sr
Modification of Al-Si Microstructure - The Al-Si-Sr Phase Diagram from 0–20 WT. % Si and 0–5.0 WT. % Sr
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Al-Si 微观结构的修改 - Al-Si-Sr 相图，含量为 0–20 % Si 和 0–5.0 % Sr。
DOI：
10.1557/proc-19-411
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
A. Hellawell
中科院分区：
文献类型：
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作者：
M. D. Hanna;A. Hellawell
众所周知，由凝固产生的初生硅和共晶硅的形态对微量杂质添加物敏感：通过碱金属和碱土金属的“改性”是常见的铸造实践，并且锶的使用是最近和当前感兴趣的，因为其效果在液体金属中保留相对长的时间。改性的机理仍然模糊不清，并且从一种元素添加到下一种元素添加不一定相同，但是如果要更好地理解这种现象，必须将平衡和动力学影响分开。因此，液相线表面和共晶反应已被定位在Al-Si-Sr系统的相关部分，通过仔细的热分析和与显微组织相关的结果。与碱金属添加剂的平行行为进行了比较。
It is well known that the morphology of primary and eutectic silicon resulting from solidification is sensitive to minor impurity additions: “modification” by alkali and alkaline earth metals is common foundry practice and the use of strontium is of recent and current interest because its effect is retained in liquid metal for relatively long times. The mechanism for modification remains obscure and is not necessarily the same from one elemental addition to the next, but it is essential to separate the equilibrium and kinetic influences if the phenomenon is to be better understood. Accordingly, the liquidus surface and eutectic reactions have been located in the relevant part of the Al-Si-Sr system by careful thermal analysis and the results correlated with the microstructure. Comparison is made with the parallel behavior of alkali metal additions.