论文部分内容阅读
采用SHS技术和传统氧 乙炔火焰喷涂技术 ,利用Al与CuO间的高能铝热反应 ,在钢的表面制备了Al2 O3 Al2 Cu3复相涂层。研究了粉体聚集状态对SHS火焰喷涂涂层物相组成、组织结构和反应机理的影响 ,结果表明 :非团聚CuO Al粉体分散在气流中缺乏发生SHS反应的条件 ,而团聚CuO Al体 ,经历反应孕育、飞行燃烧、碰撞、结构转变与凝固 4个阶段 ,形成层状结构
SHS technique and traditional oxyacetylene flame spraying technique were used to prepare the Al 2 O 3 Al 2 Cu 3 complex coating on the surface of steel by utilizing the high-energy aluminum heat reaction between Al and CuO. The effects of powder agglomeration on the phase composition, microstructure and reaction mechanism of SHS flame sprayed coatings were investigated. The results show that the non-agglomerated CuO Al powder dispersed in the gas flow lacks the conditions for SHS reaction, Experience reaction inception, flight combustion, collision, structural transformation and solidification of four stages, the formation of layered structure