| 孙佳星,程开明,王美芳,李冠宇,李培亮,刘聪,楚伟,宋文婷,周吉学.Mg-Y体系金属间化合物扩散生长行为的计算模拟[J].稀有金属材料与工程,2020,49(12):4172~4176.[Jiaxing Sun,Kingming Cheng,Meifang Wang,Guanyu Li,Peiliang Li,Cong Liu,Wei Chu,Wenting Song,Jixue Zhou.Computational simulation of diffusion growth behavior of intermetallic compounds in the Mg-Y system[J].Rare Metal Materials and Engineering,2020,49(12):4172~4176.] |
| Mg-Y体系金属间化合物扩散生长行为的计算模拟 |
| 投稿时间：2019-12-20 修订日期：2020-03-06 |
| 中文关键词: Mg-Y基稀土合金体系 扩散 金属间化合物 数值反演算法 |
| 基金项目:国家重点研发计划(No. 2017YFB0103904),山东省重点研发计划(No. 2017CXGC0404),国家自然科学基金(No. 51801116) |
| 中文摘要: |
| Mg-Y基稀土合金体系中,金属间化合物在基体中的析出和生长动力学与合金性能密切相关,研究金属间化合物的扩散生长行为具有重要意义。本工作针对已有ε-Mg24Y5和δ-Mg2Y金属间化合物形成和生长的扩散偶实验数据,采用数值反演方法计算得到了Mg-Y基稀土合金体系中,固溶体相和金属间化合物相的互扩散系数随成分和温度的变化关系。结果表明,ε-Mg24Y5的扩散系数约为δ-Mg2Y的扩散系数的4倍。同时,采用计算的扩散系数可以定量模拟出实验所测量的元素扩散分布、扩散通量以及金属间化合物层的生长厚度随时间和温度的变化关系。 |
| Computational simulation of diffusion growth behavior of intermetallic compounds in the Mg-Y system |
| 英文关键词:The Mg-Y base rare earth alloy system Diffusion Intermetallic compounds Numerical inverse methods |
| 英文摘要: |
| In the Mg-Y base rare earth alloy system, study on the diffusion growth of intermetallic compounds is important due to its close interrelation with property. Based on the experimental data of the formation and growth of intermetallic compounds ε-Mg24Y5 and δ-Mg2Y in the Mg-Y diffuison couples, the interdiffusion coefficients of each phase in the Mg-Y binary alloy system depending on components and temperatures was calculated by numerical inverse method. The results show that the diffusion coefficient of ε-Mg24Y5 is 4 times higher that of δ-Mg2Y. Moreover, the annealing induced element diffusion distribution, diffusion flux and growth thickness of IMC layer with time and temperature can be quantitatively simulated. |
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