纳米SiC对重力分离SHS陶瓷内衬复合管组织及性能的影响  

Influence of Nano SiC on Phase Composition and Properties of Inside Ceramic Lining Coating Prepared on Composite Pipes by Gravitational Separation Self-Propagation High-Temperature Synthesis

作　　者：俞建荣[1] 张卫明[1,2] 吴波[1] 凌星中[1] 肖云峰[1] 王保山[1] 郭云卿[1] 付冉[1] 

机构地区：[1]北京石油化工学院,北京102617 [2]北京化工大学,北京100029

出　　处：《材料保护》2009年第4期64-66,共3页Materials Protection

基　　金：北京市教委科技发展计划重点项目(KZ2006100-17010);北京市高校人才强教深化计划资助项目(PHR200907221);北京市URT专项基金;北京石油工化学院URT专项基金资助

摘　　要：为提高输送管道陶瓷内衬层的致密性及硬度等性能,拓展其应用,采用重力分离自蔓延高温合成(SHS)法,用(Al-Fe2O3-CuO)+SiO2复合铝热体系,制备了陶瓷内衬复合管。分析了添加剂纳米SiC对陶瓷层组织的影响。XRD分析表明,陶瓷层的主要成分为a-Al2O3,还有少量铁铝尖晶石FeAl2O4和硅线石Al2SiO5及SiC存在,SiC不改变陶瓷层的组织结构。纳米SiC的引入有效地抑制了基质晶粒生长和减轻了晶粒的异常长大,使得陶瓷层的硬度和致密性提高。Ceramic lining coating was prepared on the inside sur-faces of composite pipes by gravitational separation self-propaga-ting high - temperature synthesis ( SHS) with (Al-Fe2 O3 - CuO) plus SiO2 as the aluminothermic reactants, aiming at increasing the compactness and hardness of the lining and broaden its appli-cation scope. The effect of nano SiC additive on the phase compo-sition of the ceramic coating was investigated by means of X - ray diffraction. It was found that the ceramic coating was mainly com-posed of a - A12O3 and contained a small amount of hercynite FeAl2O4, sillimanite Al2SiO5, and SiC. SiC added in the react-ant system retained its phase structure after high-temperature syn-thesis, and it was able to effectively prevent matrix grains from growth and abnormal growing up, hence increasing the hardness and compactness of the ceramic lining coating.

关 键 词：重力分离SHS 纳米SIC 复合管 陶瓷层 组织 性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]