激光-感应复合加热法制备碳包覆纳米铝粉  

Preparation of carbon-coated Al nanopowders by laser-induction complex heating method

作　　者：张小塔[1] 宋武林[1] 郭连贵[1] 胡木林[1] 谢长生[1] 

机构地区：[1]华中科技大学材料学院模具技术国家重点实验室,湖北武汉430074

出　　处：《推进技术》2007年第3期333-336,共4页Journal of Propulsion Technology

基　　金：国家自然科学基金资助项目(50471061)

摘　　要：为了探索固体火箭推进剂的新型燃烧剂,采用激光-感应复合加热法在CH4气和Ar气的气氛下制备了碳包覆铝纳米粒子。对这种纳米粒子进行了X射线衍射(XRD)、透射电子显微镜(TEM)和高分辨透射电镜(HRTEM)的物相、形貌和结构分析,结果表明,该纳米粒子具有明显的核壳结构。差热分析(DTA)表明了碳包覆纳米铝粉在氧气氛中540℃左右剧烈氧化。简要讨论了碳包覆铝纳米颗粒的形成过程,即碳原子没有溶解在纳米铝颗粒内部,而是在铝颗粒的表面成核长大。　To explore new combustion agents of solid rocket propellants,carbon-coated Al nanoparticles have been obtained by laser-induction complex heating method in a mixture of methane gas and Ar gas atmosphere.The as-prepared nanoparticles with clear core-shell structure were found by analysis of phases,morphologies and strutural features with X-ray diffraction,transmission electron microscopy and high-resolution transmission electron microscopy Differential thermal analysis showed carbon-coated Al nanopowders were oxidated acutely about at 540℃ in oxygen atmosphere.The pathway for the carbon-coated Al nanoparticles formation that C atoms are not dissolved into Al nanoparticles but directly transformed into the graphitic coating on the surface of Al was discussed briefly.

关 键 词：固体推进剂 燃烧剂 碳包覆 纳米铝粉 激光-感应复合加热法 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]