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金属学报  2002 

Ni3Al中B和Mg的非平衡晶界共偏聚

, PP. 829-834

Keywords: 非平衡偏聚,,,金属间化合物,Ni3Al

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Abstract:

在1023-1373K的初始温度和0.05-268.91K/s的冷速范围内,用Auger剖层分析确定含B和Mg的Ni3Al合金中B和Mg的非平衡晶界共偏聚行为.按照溶质-空位复合体迁移机制所导出的描述非平衡晶界偏聚的扩散速率方程解析表达式,很好地模拟了本实验结果;并确定了Ni3Al-B-Mg合金中B及B-空位复合体、Mg及Mg-空位复合体的扩散系数及复合体激活能.

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