摘要
钛基复合材料中增强相的形貌和分布是决定材料性能的关键,常规粉体机械混合后烧结引入增强相的方式存在形貌难调控、分布单一且均匀性差等问题,导致其强化效果不佳。针对该问题,本团队开发了一系列碳包覆钛复合粉体,通过设计包覆碳源的结构与组成调控粉体烧结过程中增强相的形成路径,不仅实现了增强相形貌调控和不同形貌的组合搭配,而且得到了晶内和晶界双增强相组织,大幅提升了钛基复合材料的力学性能。在此基础上,将碳包覆钛复合粉体拓展应用至钛基复合材料的3D打印领域,解决了高品质复合粉体缺乏并制约其发展的瓶颈问题。总结并评述了碳包覆钛复合粉体在制备钛基复合材料中取得的研究结果与工作进展,为增强相设计与调控提供新的研究思路及技术路线。
The morphology and distribution of reinforcements in the titanium matrix composites(TMCs)are crucial in determining the material performances.Due to the uncontrollable morphology and inhomogeneous distribution of the reinforcements in the current TMCs,a series of C-coated Ti composite powders were developed by fluidization technology.By designing the structure and composition of C-coatings,the different morphology combinations and the intragranular/interface reinforcements were both achieved,which significantly improved the mechanical properties of TMCs.Furthermore,the composite powders were also extended to the 3D printing of TMCs,which solved the bottleneck issue of lacking the high-quality composite powders.The research results and work progress of the C-coated Ti composite powders in the preparation of high-performance TMCs were summarized and reviewed,providing the new insight and technical route for the design and control of reinforcements in TMCs.
作者
李少夫
杨亚锋
LI Shao-fu;YANG Ya-feng(State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Science and Technology on Particle Materials,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China)
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2022年第5期421-430,450,共11页
Powder Metallurgy Technology
基金
国家自然科学基金资助项目(52174349,52074254,51874271)
山东省重点研发计划资助项目(2019JZZY010363)
中国科学院粉体重点实验室课题(CXJJ-22S043)
河南省“揭榜挂帅”科技项目(211110230200)。
关键词
钛基复合材料
粉末冶金
增强相
强化机制
titanium matrix composites
powder metallurgy
reinforcement
strengthening mechanism
