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Si-Al-Sn合金熔体中块体硅定向生长行为研究

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Indexed by:期刊论文

Date of Publication:2016-08-01

Journal:无机材料学报

Included Journals:SCIE、EI、PKU、ISTIC、CSCD、Scopus

Volume:31

Issue:8

Page Number:791-796

ISSN No.:1000-324X

Key Words:Si-Al-Sn合金;定向凝固;块体硅

Abstract:为从Si-Al-Sn合金中有效分离初晶硅,本研究提出并实现了三元合金定向生长块体硅的技术.通过考察冷却速度、合金成分、温度梯度与晶体生长速度比值(G/R)等参数及其影响机制,确定促进块体硅稳定生长的有利条件;对比Si-Al、Si-Sn二元合金体系,采用成分过冷理论分析金属Sn对三元合金中块体硅生长行为的影响;采用电子探针显微分析仪考察块体硅微观组织形貌与杂质分布.研究结果表明:定向凝固方法能有效分离块体硅,同时抑制块体硅内金属夹杂物生成,并将杂质含量控制在其固溶度范围内,成为一种有效分离、回收高纯初晶硅的新途径.

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