采用电弧熔炼的方法制备了Nb-16Si-24Ti-6Cr-6Al-2Hf(原子分数/%)合金.在1250℃下对其进行不同时间的热处理.使用SEM,EDS,XRD等方法进行组织分析.结果表明:多元合金化能消除Nb-Si合金中亚稳相Nb3Si;热处理能够有效改善Nb-Si多元合金中硅化物的分布、尺寸、形态和数量;热处理使得β-Nb5Si3转变为α-Nb5Si3.
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