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材料工程  2007 

稳恒强磁场对Al-Cu扩散偶界面中间相形成和生长的影响

Keywords: 稳恒强磁场,Al-Cu扩散偶,中间相,扩散

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Abstract:

研究了稳恒强磁场作用下Al-Cu扩散偶界面中间相组成和扩散行为.结果表明强磁场作用下扩散偶中间相厚度显著增加,并且随磁场强度增大,界面中间相组成发生变化.按照抛物线规律计算了强磁场作用下扩散偶中间相的扩散系数,发现在平行和垂直于磁场的两个方向上扩散系数有显著差异,垂直于磁场方向的扩散系数比平行于磁场方向更大.强磁场促进了Al-Cu扩散偶中Al和Cu原子的扩散,加速了界面中间相的形成和生长过程.磁场作用差异导致了扩散的各向异性.利用原子扩散理论初步分析了产生上述现象的原因.

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