材料期刊网

碳纳米管作为一维纳米材料，不仅重量轻，还具有强度高、韧性高等优异的力学性能，与工程结构陶瓷材料复合能够强韧化陶瓷材料的力学性能，被认为是现代结构陶瓷复合材料的理想增强体。在综合了近年碳纳米管增强陶瓷基复合材料的理论及实验方面研究结果的基础上，侧重介绍了碳纳米管增强陶瓷基复合材料的强韧化机理，如细化晶粒增韧、短纤维增韧、碳纳米管独特的坍塌增韧、多壁碳纳米管抽出增韧机制，并讨论了采用剪切滞后理论模型对碳纳米管与陶瓷基体的微观界面结合力学性能模拟的研究结果。分析了国内外碳纳米管在陶瓷基体中强韧化机理的实验及模拟研究结果，总结了当前碳纳米管增强陶瓷复合材料的研究困境与存在的问题，并指出了今后理论和实验研究的方向。

Carbon nanotube, as a one-dimension nanomaterial with lightweight, has excellent mechanical properties like high toughness and strength. It can toughen ceramics by composing with engineering ceramics, and is considered as an ideal reinforcement phase in ceramic materials. In this paper, the toughening mechanism of carbon nanotubes ( including grain re-finement, toughness of short fiber and toughening mechanism of multi-wall carbon nanotubes’ collapse) , as well as simula-tion results of micro mechanical behavior of interface between carbon nanotubes and ceramic matrix by using the Shear-Lag-Model-Based stress analysis were discussed based on experimental and theoretical researches of the carbon nanotubes-ce-ramic composite. And then the comprehensive analysis of strengthening and toughening mechanism of carbon nanotubes in ceramic matrix is given, the current research problems are summarized and future research directions are considered.