铝液还原熔盐中ZrO<sub>2</sub>制备纯铝锆母合金

铝液还原熔盐中ZrO₂制备纯铝锆母合金

摘要: 研究了铝液还原熔盐中ZrO₂制备铝锆母合金的新方法，考察了还原时间对合金中锆浓度的影响.结果表明，铝液还原熔盐中ZrO₂法制备出的铝锆母合金不含有氧化锆和氧化铝夹杂，可制备出更纯净的铝锆母合金.扫描电镜和电子能谱分析结果表明，合金中的Zr主要以Al₃Zr晶须形式存在.铝锆母合金中锆浓度随还原时间的延长而明显增加，当还原4 h后合金中锆质量百分含量为1.5 %，基本达到上限值.

Abstract: Al-Zr master alloy is prepared by the new method of Al reducing ZrO₂ dissolved in molten salt and the effect of reduction time on Zr content in the Al-Zr master alloys is studied. The results showed that purer alloy can be gained because the Al-Zr master alloy prepared by the new method of Al reducing ZrO₂ dissolved in molten salt does not contain zirconia and alumina inclusion. The alloy samples analyzed by SEM and EEP show that the Zr of Al-Zr master alloy exists mainly in form of Al₃Zr crystal whisker. The Zr content of Al-Zr master alloy increases obviously with the increasing of reduction time and