Abstract: The preparation process of eutectic structure refers to the process of precipitating two or more different solid phases closely adjacent to each other during cooling in the alloy melt with a certain concentration of solute. If the two closely adjacent two or many different solid phase processes are formed, at the same time, the precipitated solid can be distributed regularly in the matrix, a variety of eutectic material with special properties can be prepared. And eutectic structure materials are widely used in aerospace and nuclear industry. On the basis of eutectic theory, some scientists have proposed a new process of preparing regular porous metal structure by directional solidification method, and the unique mechanical and thermal properties of porous metal indicate that it has a broad application prospect. The essential problem in the preparation of eutectic microstructure is that how to effectively control the solidification process of eutectic under given preparation conditions. Dynamics of eutectic solidification process, formation and evolution of eutectic solid-liquid interface and solid-solid in-terface are two basic problems in eutectic solidification, they constitutes an indivisible nonlinear dynamical system. Meanwhile, they determine the quality and properties of final product materials,so they are needed to be studied deeply. The key factor of eutectic growth theory is to explore the coupling behavior of the two in eutectic growth. Therefore, the theoretical results of eutectic growth will enable people to understand the formation of microstructures and the evolution of interfaces. So, we can better control the solidification process and obtain better mechanical properties of the product. It has been known for a long time that, the directional solidification of eutectic alloys at near eutectic compositions, the theoretical orientation of lamellar eutectic growth is consistent with that of temperature gradient. But there are certain growth conditions, the eutectic solid-liquid interface will move along in the vertical direction of the pulling speed, so it will result in a certain angle of inclination between the solid-solid interface and the traction velocity, Thus, another mode of eutectic growth is produced: inclined eutectic growth. The theory of eutectic solidification can be further improved, the properties of eutectic materials can be improved and the problem of preparing eutectic materials in industrial production can be solved, if we study the tilt growth of eutectic. A large number of theoretical and experimental studies have been carried out on the influence factors and morphology of the layered eutectic tilt growth. In this paper, the research progress and methods of stratified eutectic slant growth from the development of oblique eutectic growth and orientation solidification technology are described. The influence of various parameters and anisotropic on the morphology of tilt eutectic growth is summarized. We point out some questions in current researches, and propose the new perspectives for future research.
作者简介: 魏岑,2016年6月毕业于重庆文理学院,获得工学学士学位。现为昆明理工大学材料科学与工程学院硕士研究生,在李向明副教授的指导下进行研究。目前主要研究领域为倾斜共晶生长的机制。
李向明,昆明理工大学材料科学与工程学院副教授、硕士研究生导师。2004年7月本科毕业于唐山师范学院应用数学专业,2011年6月在北京科技大学材料加工工程专业取得博士学位。2011年七月进入昆明理工大学材料科学与工程学院,2013年8月被评选为副教授。主要从事有色金属熔炼与成型技术、热加工过程中的模拟仿真、多孔金属材料制备的研究工作。近年来发表论文20余篇,包括Journal of Crystal Growth和Journal of Applied Physics等期刊。
引用本文:
魏岑,李向明. 一种不稳定的共晶生长方式:倾斜共晶生长的研究进展[J]. 材料导报, 2019, 33(15): 2532-2537.
WEI Cen, LI Xiangming. An Unstable Eutectic Growth Mode: Research Progress of Tilt Eutectic Growth. Materials Reports, 2019, 33(15): 2532-2537.
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2019, Vol. 33 
