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材料导报  2026, Vol. 40 Issue (2): 24110139-11    https://doi.org/10.11896/cldb.24110139
  金属与金属基复合材料 |
导热稀土镁合金研究进展
李坤1,2, 李瑞红1,*, 任慧平1,*, 胡文鑫2, 王海燕1, 杨正华2
1 内蒙古科技大学材料科学与工程学院,内蒙古 包头 014010
2 包头稀土研究院,内蒙古 包头 014010
Research Progress on Thermal Conductivity Rare Earth Magnesium Alloys
LI Kun1,2, LI Ruihong1,*, REN Huiping1,*, HU Wenxin2, WANG Haiyan1, YANG Zhenghua2
1 School of Materials Science and Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China
2 Baotou Research Institute of Rare Earths, Baotou 014010, Inner Mongolia, China
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摘要 本文系统综述了导热稀土镁合金领域的最新研究进展,重点聚焦含La、Ce稀土元素合金体系的开发动态。通过分析稀土元素对镁合金热传导性能的作用机理,深入剖析了导热与力学性能协同强化的内在关联机制,并对现有镁合金热导率预测模型进行系统归纳。创新性提出高导热稀土镁合金多尺度设计策略:(1)通过优选固溶度较低的稀土元素(如La、Ce)作为主要合金元素,同时严格控制其他高固溶元素含量,实现晶格畸变最小化与力学性能协同提升;(2)结合热处理工艺优化第二相形貌、尺寸及分布特征,构建高效导热网络。研究表明,La、Ce稀土元素通过净化基体、调控析出相分布等机制,可显著提升镁合金热导率至20%以上。基于此提出的成分-工艺协同优化设计框架,为开发热导率超过120 W/(m·K)且抗拉强度突破250 MPa的新型高性价比稀土镁合金材料提供了理论指导。该研究对推动镁合金在电子封装、航空航天等热管理领域的工程应用具有重要参考价值。
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李坤
李瑞红
任慧平
胡文鑫
王海燕
杨正华
关键词:  稀土  镁合金  热导率  固溶原子  热处理    
Abstract: This paper provides a comprehensive review of the latest research progress in the field of thermally conductive rare earth magnesium alloys, with a particular focus on the development trends of alloy systems containing La and Ce rare earth elements. By analyzing the mechanism of action of rare earth elements on the thermal conductivity of magnesium alloys, the intrinsic correlation between thermal conductivity and mechanical properties enhancement is deeply analyzed, and the existing magnesium alloy thermal conductivity prediction models are systematically summarized. An innovative multi-scale design strategy for high thermal conductivity rare earth magnesium alloys is proposed: (1) By selecting rare earth elements with lower solubility (such as La, Ce) as the main alloying elements, while strictly controlling the content of other high solubility elements, the minimization of lattice distortion and the synergistic improvement of mechanical properties are achieved; (2) Combining the optimization of heat treatment processes to tailor the morphology, size, and distribution characteristics of the second phase, an efficient thermal conduction network is constructed. The findings show that La and Ce rare earth elements can significantly enhance the thermal conductivity of magnesium alloys by more than 20% through mechanisms such as purifying the matrix and regulating the distribution of precipitated phases. The composition-process synergistic optimization design framework proposed based on this provides theoretical guidance for the development of new high-performance rare earth magnesium alloy materials with thermal conductivity exceeding 120 W/(m·K) and tensile strength exceeding 250 MPa. This research has significant reference value for promoting the engineering application of magnesium alloys in thermal management fields such as electronic packaging and aerospace.
Key words:  rare earth    magnesium alloy    thermal conductivity    solid solution atoms    heat treatment
出版日期:  2026-01-25      发布日期:  2026-01-27
ZTFLH:  TG146.22  
基金资助: 内蒙古自治区自然科学基金(2024LHMS05054);内蒙古自治区直属高校基本科研业务费(2022-153)
通讯作者:  *李瑞红,副教授,研究方向为高性能稀土镁合金的开发与应用。liruihong@imust.edu.cn;
任慧平,教授,博士研究生导师。研究方向为优势资源高性能金属材料相关机理研究与开发应用。renhuiping@sina.com   
作者简介:  李坤,高级工程师,内蒙古科技大学材料与冶金学院博士研究生,在任慧平教授、李瑞红副教授的指导下进行研究。研究方向为高性能稀土镁合金的开发与应用。
引用本文:    
李坤, 李瑞红, 任慧平, 胡文鑫, 王海燕, 杨正华. 导热稀土镁合金研究进展[J]. 材料导报, 2026, 40(2): 24110139-11.
LI Kun, LI Ruihong, REN Huiping, HU Wenxin, WANG Haiyan, YANG Zhenghua. Research Progress on Thermal Conductivity Rare Earth Magnesium Alloys. Materials Reports, 2026, 40(2): 24110139-11.
链接本文:  
https://www.mater-rep.com/CN/10.11896/cldb.24110139  或          https://www.mater-rep.com/CN/Y2026/V40/I2/24110139
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