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难混溶合金及其制备技术研究进展
引用本文:郭景杰,崔红保,苏彦庆,毕维生,贾均,傅恒志.难混溶合金及其制备技术研究进展[J].特种铸造及有色合金,2004(1):1-8.
作者姓名:郭景杰  崔红保  苏彦庆  毕维生  贾均  傅恒志
作者单位:哈尔滨工业大学
摘    要:综述了难混溶合金在微重力和地面条件下制取具有均匀弥散相结构的研究成果。指出了形核、生长-扩散-对流/扩散、重力造成的沉积或上浮、相间界面能、Ostwald熟化、Marangoni运动、Brownian凝并、第二相含量和冷却速度等影响难混溶合金凝固的各种因素,分析了难混溶合金在定向凝固过程中从纤维型规则复合组织到规则排列的串状组织再到弥散分布粒子的组织演变现象。根据难混溶合金的凝固特点,介绍了粉末冶金法、定向凝固法、模拟微重力熔融铸造法、搅拌铸造法、快速凝固法等几种不同特点的制备技术。总结了密度动态法、分离粒子法、相场法等计算机组织模拟方法在难混溶合金方面的应用,同时指出了难混溶合金研究存在的问题和今后的研究方向。

关 键 词:难混溶合金  制备技术  组织模拟
文章编号:1001-2249(2004)01-0001-08
修稿时间:2003年10月16

The Research Progress of Immiscible Alloy and Its Preparation Technology
Guo Jingjie,Cui Hongbao,Su Yanqing,Bi Weisheng,Jia Jun,Fu Hengzhi.The Research Progress of Immiscible Alloy and Its Preparation Technology[J].Special Casting & Nonferrous Alloys,2004(1):1-8.
Authors:Guo Jingjie  Cui Hongbao  Su Yanqing  Bi Weisheng  Jia Jun  Fu Hengzhi
Abstract:Some research achievements of immiscible alloy preparation with dispersed and homongeneous phase structure under micro-gravity and gravity environment have been summarized. The various effective factors on solidification of the immiscible alloy including nucleation, growth-diffusion-convection/diffusion, deposition and floatation due to gravity interfacial energy, Ostwald ripping, Marangoni motion, Brownian coagulation, the content of second phase and cooling rate are pointed. The unidirectionally solidified microstructures of the alloy are evolved from regular fibrous compound structure to regular array of in-droplets and then to random dispersion of in-droplets in the matrix. The varieties of preparation technology, including powder metallurgy, uni-directional solidification, simulated casting method under microgravity condition, stirring casting, rapid solidification, have been introduced based on the solidification characteristics. Meanwhile, the application of computer simulation for immiscible alloys including the dynamic density method, discrete particle method and phase field method has been shown. The problems and the future orientation in immiscible alloys have been also pointed out.
Keywords:Immiscible Alloys  Preparation Technology  Microstructural Simulation
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