基于箔材反应退火合成的TiAl基复合材料板材研究进展
作者简介 耿 林,男,1964年生,教授
收稿日期: 2018-07-03
网络出版日期: 2018-07-23
基金资助
国家重点研发计划项目No.2017YFB0703100及国家自然科学基金项目Nos.51701081、51571070和51571071
Recent Progress on the Fabrication of TiAl-Based Composites Sheet by Reaction Annealingof Elemental Foils
Received date: 2018-07-03
Online published: 2018-07-23
Supported by
Supported by National Key Research and Development Program of China (No.2017YFB0703100) and National Natural Science Foundation of China (Nos.51701081, 51571070 and 51571071)
本文综述了利用纯Ti箔和铝基复合材料(Al-MMC)箔反应退火合成TiAl基复合材料板材的研究进展。该方法包括对多层Ti/Al-MMC复合板的变形和反应退火热处理,在避免对脆性TiAl金属间化合物直接变形的同时,制备出具有较高强度和延伸率的TiAl基复合材料板材。对合成过程中TiAl基复合材料板材的组织演化和形成机理进行了总结,重点阐明了铝基复合材料与Ti的两步热处理的反应机理,提出了消除Kirkendall孔洞的工艺方法,为大尺寸TiAl基复合材料板材的制备提供了可行的工艺方案。
关键词： TiAl金属间化合物; 复合材料; 板材; 反应退火; 扩散动力学
耿林 , 吴昊 , 崔喜平 , 范国华 . 基于箔材反应退火合成的TiAl基复合材料板材研究进展[J]. 金属学报, 2018 , 54(11) : 1625 -1636 . DOI: 10.11900/0412.1961.2018.00308
This paper reviews the current progresses on the fabrication of TiAl-based composites produced by reaction annealing of elemental Ti and Al matrix composite foils. This technique includes deformation and reaction annealing of the multilayer Ti/Al metal matrix composite (MMC) sheet, which prevents traditionally direct deformation of brittle TiAl intermetallic, and TiAl-based composites sheets with good strength-ductility synergy have been produced. The research on microstructure evolution and forming mechanism of the TiAl-based composites sheet during reaction annealing has been summarized, with the focus on the reaction mechanism between Al-MMCs and Ti during reaction annealing, and the method to eliminate Kirkendall voids is proposed. A feasible proposal is provided to fabricate large scale TiAl-based composite sheets.
Key words： TiAl intermetallics; composite; sheet; reaction annealing; diffusion kinetics
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