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Mg-Y体系金属间化合物扩散生长行为的计算模拟
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1.齐鲁工业大学山东省科学院;2.山东建筑大学材料科学与工程学院

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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)


Computational simulation of diffusion growth behavior of intermetallic compounds in the Mg-Y system
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Affiliation:

1.Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology Shandong Academy of Sciences,Jinan;2.Shandong Provincial Key Laboratory for Special Silicone-Containing Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences);3.College of Materials Science and Engineering,Shandong Jianzhu University,Jinan

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    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。

    Abstract:

    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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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.]
DOI:10.12442/j. issn.1002-185X.20191076

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  • 收稿日期:2019-12-20
  • 最后修改日期:2020-03-06
  • 录用日期:2020-03-19
  • 在线发布日期: 2021-01-13
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