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。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。
In the Mg-Y based rare earth alloy system,the 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 int ermetallic compoundsε-Mg24Y5 andδ-Mg2Y in the Mg-Y diffusion couples,the composition-and temperature-dependent interdiffusion coefficients of each phase in the Mg-Y alloy system were calculated by numerical inverse method.The results show that the diffusion coefficient ofε-Mg24Y5 is 4 times higher than that ofδ-Mg2Y.Moreover,the annealing induced element diffusion distribution,diffusion flux and growth thickness of IMC layer with time and temperature can be quantitatively simulated.
作者
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
Sun Jiaxing;Cheng Kaiming;Wang Meifang;Li Guanyu;Li Peiliang;Liu Cong;Chu Wei;Song Wenting;Zhou Jixue(Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials,Advanced Materials Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;Shandong Provincial Key Laboratory for Special Silicone-Containing Materials,Advanced Materials Institute,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250014,China;College of Materials Science and Engineering,Shandong Jianzhu University,Jinan 250000,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第12期4172-4176,共5页
Rare Metal Materials and Engineering
基金
国家重点研发计划(2017YFB0103904)
山东省重点研发计划(2017CXGC0404)
国家自然科学基金(51801116)。
