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Fe—Ti—C熔体中TiC颗粒的原位合成及长大过程研究
引用本文:严有为,魏伯康.Fe—Ti—C熔体中TiC颗粒的原位合成及长大过程研究[J].金属学报,1999,35(9):909-912.
作者姓名:严有为  魏伯康
作者单位:[1]武汉工业大学材料复合新技术国家重点实验室 [2]华中理工大学材料科学与工程学院
基金项目:材料复合新技术国家重点实验室开放基金,华中理工大学科技基金
摘    要:本文研究了Fe-Ti-C合金溶体中原位TiC颗粒的形成过程。结果表明:在合金熔体的等温过程中,Ti和C原子首先不断反应合成TiC颗粒,址对生成的TiC与熔体达到不平衡;然后,TiC颗粒按照小颗粒不断溶解。大颗粒相应在粗化的模式而长大。其中,TiC颗粒的合成过程又可进一步分为TiC晶核的形成和长大两个阶段越长,本中TiC颗粒的数目越多,尺寸越小,而当TiC的合成反应平衡后,如继续延长等温时间,则熔体

关 键 词:Fe-Ti-C熔体  原位反应  复合材料  碳化钛

STUDY ON THE IN SITU SYNTHESISING AND GROWING PROCESS OF TiC PARTICULATES IN MOLTEN Fe-Ti-C ALLOY
YAN Youwei, WEI Bokang, FU Zhengyi, LIN Hantong, YUAN Runzhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan Institute of Materials Science and Engineering,Huazhong Uni.STUDY ON THE IN SITU SYNTHESISING AND GROWING PROCESS OF TiC PARTICULATES IN MOLTEN Fe-Ti-C ALLOY[J].Acta Metallurgica Sinica,1999,35(9):909-912.
Authors:YAN Youwei  WEI Bokang  FU Zhengyi  LIN Hantong  YUAN Runzhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing  Wuhan University of Technology  Wuhan Institute of Materials Science and Engineering  Huazhong Uni
Affiliation:YAN Youwei, WEI Bokang, FU Zhengyi, LIN Hantong, YUAN Runzhang1) State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 4300702) Institute of Materials Science and Engineering,Huazhong Uni
Abstract:The forming process of TiC particulates in molten Fe-Ti-C alloy has been studied. Theresults show that during the temperature-holding for the melt, TiC particulates are synthesised firstlythrough the reaction between Ti and C atoms until the equilibrium between formed TiC and the melt isreached, and then the synthesised TiC particulates continue to grow according to the model in which thesmaller particulates tend to dissolve and larger ones to grow by the diffusion of solute through the solventfrom the smaller particulate to the larger one. In the above mentioned process, the synthesising process ofTiC particulates can be further divided into two periods of TiC crystal nucleuses formation and growth.The longer is nucleus-forming period,the more and finer are the synthesised TiC particulates in the melt.When the equilibrium of TiC synthesising reaction is reached, the average size of TiC particulates willincrease and total number of the particulates will decrease if the temperature-holding time continue toprolong.
Keywords:Fe-Ti-C alloy melt  TiC particulate  in situ reaction  TiC_p/Fe composite
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