非平衡等离子合成CNT/TiC强化多孔材料的结构研究

项目名称： 非平衡等离子合成CNT/TiC强化多孔材料的结构研究

项目编号： No.51272141

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 崔洪芝

作者单位： 山东科技大学

项目金额： 80万元

中文摘要： TiC基多孔复合材料具有耐磨、耐蚀、耐热和一定催化性能，在环保、石化、医药、食品等领域有巨大应用前景，然而TiC等陶瓷材料韧性低、脆性大，在制成高孔隙率的多孔材料时因为孔洞壁薄，这种局限性更加突出。本研究提出利用等离子非平衡加热，在多壁碳纳米管（MWCNT）表面合成纳米TiC，利用MWCNT/TiC对TiC基多孔复合材料的骨架- - "墙壁"补强、增韧，合成的纳米TiC层有效改善CNT与基体的界面结合；同时依靠等离子束引发反应，合成TiC基多孔复合材料，材料中的孔洞伴随反应过程产生。着重研究等离子束对MWCNT表面改性及其对MWCNT/TiC界面结构的影响，分析在多孔TiC复合材料的孔洞小空间内，非平衡等离子加热以及大量MWCNT对反应合成多孔复合材料组织结构、孔结构及表面结构的影响，探索碳纳米管强化陶瓷复合材料的有效界面结构及方法，为获得高性能、多功能的结构功能一体化多孔复合材料。

中文关键词： 等离子；原位合成；多孔复合材料；碳化钛；碳纳米管

英文摘要： Porous TiC matrix composites have great prospects of applications in environmental protection, petrochemical industry, medicine and food industries due to their excellent properties of wear resistance, corrosion resistance, heat resistance and catalytic Properties. However, the low toughness and high brittleness limits the application of TiC ceramics, especialy in porous TiC with high porosity and thin walls. In this proposal, nano-TiC particles could be formed in the surfaces of multi-wall carbon nanotubes(MWCNT) at unequilibrium conditions by plasma heating. Thus, the MWCNT/TiC can strengthen and toughen the pore walls, i.e. skeletons of porous TiC matrix composites. The nano TiC layer by in-situ synthesising can effectively improve the interface bonding characters between CNT and TiC matrix. And porous TiC matrix composites are prepared by powder reactions initiated by plasma. Pores are formed during the reaction process simultaneiously. The research focuses the influences of plasma on the MWCNT surface modification and its impact on the interface structure of MWCNT/TiC, and the effects of MWCNT on microstructures,pore structures and surface morphology in small space during the porous TiC matrix composites synthesized at unequilibrium plasma heating conditions. The intention of this project is to explore appr

英文关键词： Plasma；In-situ synthesis；Porous；TiC；CNTs