钛基石墨烯复合材料的分散性、界面结构及力学性能  

Dispersion, Interface Structure and Mechanical Properties of Titanium Based Graphene Composites

作　　者：佘欢 时磊 董安平[2,3] SHE Huan;SHI Lei;DONG Anping(School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming,Shanghai 200240,China)

机构地区：[1]上海应用技术大学机械工程学院,上海201418 [2]上海交通大学材料科学与工程学院,上海200240 [3]上海市先进高温材料及其精密成形重点实验室,上海200240

出　　处：《材料导报》2024年第5期234-241,共8页Materials Reports

基　　金：国家自然科学基金青年基金(51901131);上海应用技术大学引进人才科研启动项目(YJ2020-19)。

摘　　要：石墨烯由于独特的结构和优异的力学、导电、润滑等性能,被认为是理想的金属基复合材料的增强体。将石墨烯作为增强体增强钛基复合材料有着巨大的应用潜力。然而,石墨烯的分散性及其与钛基体的反应是制约获得高性能石墨烯增强钛基复合材料的难点。本文综述了钛基石墨烯复合材料的分散性、界面及力学性能的研究进展。钛基石墨烯复合材料通常采用粉末冶金法制备,石墨烯能较均匀地分散于复合材料组织中,但当石墨烯添加量过多时仍会出现团聚现象。石墨烯与钛基体易发生反应生成TiC,通过固化烧结工艺的改进、基体复合化、石墨烯表面改性以及原位自生等方法可以有效地抑制界面反应并提高界面结合力。随着石墨烯含量的增加,钛基石墨烯复合材料的压缩、拉伸强度与硬度一般呈现先增大后减小的趋势。石墨烯增强钛基复合材料的强化机制通常以载荷传递强化为主,但有些情况下由石墨烯引起的位错强化、细晶强化及奥罗万(Orowan)强化效果也较为显著。Graphene is considered to be an ideal reinforcement for metal matrix composites due to its unique structure and excellent mechanical,electrical and lubricating properties.However,the dispersion of graphene and its reaction with titanium matrix are the difficulties in obtaining high-performance graphene reinforced titanium matrix composites.This paper reviews the research progress of dispersion,interface and mechanical properties of titanium-based graphene composites.Titanium-based graphene composites are usually prepared by powder metallurgy.Graphene can be uniformly dispersed in the composite structure,but agglomeration still occurs when too much graphene is added.Graphene and titanium matrix are prone to react to form TiC.The interface reaction can be effectively inhibited and the interface bonding force can be improved by improving the curing sintering process,matrix compounding,graphene surface modification and in-situ self-generation.With the increase of graphene content,the compressive,tensile strength and hardness of titanium-based graphene composites generally increase first and then decrease.The strengthening mechanism of graphene reinforced titanium matrix composites is usually dominated by load transfer strengthening,but in some cases,dislocation strengthening,fine grain strengthening and Orowan strengthening caused by graphene are also significant.

关 键 词：石墨烯 钛基复合材料 分散性 界面 强度 强化机制 

分 类 号：TG146.2[一般工业技术—材料科学与工程]