| 引用本文： |
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欧阳义芳,刘珂,曹宇,陈红梅,陶小马.Al-Cu二元系在540℃时的扩散行为研究[J].广西科学,2018,25(6):654-657,662. [点击复制]
- OUYANG Yifang,LIU Ke,CAO Yu,CHEN Hongmei,TAO Xiaoma.Study on Diffusion Behavior of Al-Cu Binary System at 540℃[J].Guangxi Sciences,2018,25(6):654-657,662. [点击复制]
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| 摘要: |
| [目的] 研究Al-Cu二元系在540℃的扩散行为，为Al-Cu双金属复合结构实用化提供参考依据。[方法] 利用电子探针显微分析仪（EPMA）对不同退火温度下二元扩散偶的形貌和成分进行分析研究。[结果] 将Al-Cu二元扩散偶在540℃的真空退火炉中分别退火36 h、48 h和60 h后，在扩散区可以观察到4种金属间化合物（IMCs）θ（Al2Cu）、η2（Al0.939Cu0.987）、ζ2（Al9Cu11.5）和γ1（Al4Cu9）。中间化合物扩散层的厚度与时间的平方根呈现线性关系，符合抛物线生长规律。同时，为了进一步研究Al-Cu之间的扩散行为，对互扩散系数进行计算，并对该方法做详细的介绍。[结论] 随着温度的升高，金属间化合物的生长常数和互扩散系数也随之增加，其中Al4Cu9的生长常数和扩散系数在4个IMCs最大。金属间化合物的生长主要受到体扩散的控制。 |
| 关键词: 扩散偶 生长常数 互扩散系数 中间化合物 |
| DOI：10.13656/j.cnki.gxkx.20181225.006 |
| 投稿时间：2018-08-29 |
| 基金项目:国家自然科学基金项目（11464001，51531009，51661003）和广西自然科学基金项目（2014GXNSFAA118308，2016GXNSFBA380166）资助。 |
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| Study on Diffusion Behavior of Al-Cu Binary System at 540℃ |
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OUYANG Yifang, LIU Ke, CAO Yu, CHEN Hongmei, TAO Xiaoma
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| (College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China) |
| Abstract: |
| [Objective] The diffusion behavior of Al-Cu binary system at 540℃ was studied to provide a reference for the practical application of Al-Cu bimetallic composite structure.[Methods] The morphology and composition of binary diffusion couples at different annealing temperatures were analyzed and studied by electron probe micro-analyzer (EPMA).[Results] After the Al-Cu binary diffusion couple was annealed in a vacuum annealing furnace at 540℃ for 36 h,48 h and 60 h,respectively,four inter-metallic compounds(IMCs)θ(Al2Cu)、η2(Al0.939Cu0.987)、ζ2(Al9Cu11.5) and γ1(Al4Cu9) had been observed in the diffusion region. The thickness of the IMCs diffusion layer had a linear relationship with the square root of time, which was consistent with the parabolic growth law. At the same time, in order to further study the diffusion behavior between Al-Cu,we calculated the inter-diffusion coefficient and introduced the method in detail.[Conclusion] With the increase of temperature, the growth constant and inter-diffusion coefficient of inter-metallic compounds also increased. The growth constant and diffusion coefficient of Al4Cu9 were the largest among the four IMCs.The growth of IMCs was primarily controlled by bulk diffusion. |
| Key words: diffusion couple growth constant inter-diffusion coefficient intermediate compounds |
