反应火焰喷涂TiC/Fe复合涂层的动力学  

Dynamics of reactive flame sprayed TiC/Fe composite coatings

作　　者：刘长松[1] 李志文[1] 黄继华[2] 殷声[2] 

机构地区：[1]青岛理工大学机械工程学院,青岛266033 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《中国有色金属学报》2006年第9期1522-1526,共5页The Chinese Journal of Nonferrous Metals

基　　金：青岛市科技发展计划资助项目(05-1-JC-89);河南省杰出人才创新基金资助项目(0421001000)

摘　　要：以钛铁、铁和石墨为主要原料,用反应火焰喷涂技术制备TiC/Fe复合涂层。在喷涂过程中,在氧乙炔火焰条件下引燃Fe-Ti-C体系的自蔓延高温合成(SHS)反应,研究该SHS反应的动力学。结果表明,适当增加铁和石墨,或减小反应组元的粒度,会显著降低体系的点火温度,可促进Fe-Ti-C反应体系在氧乙炔火焰中的点火进程。喷涂粉末粒度、氧乙炔火焰功率、喷涂距离以及喷涂粉末的原料配比均会影响Ti-C间的反应程度,从而影响Fe-Ti-C体系的反应动力学。The TiC/Fe composite coatings were prepared by reactive flame spray using ferrotitanium, iron and graphite as the starting materials, which need ignite the self-propagation high-temperature synthesis （SHS） reaction of Fe-Ti-C system by oxygen-acetylene flame. The dynamics of this SHS reaction were studied. The ignition temperature is reduced by increasing Fe content and graphite content or by decreasing the size of reactive components. The degree of the complete reaction is affected by spray powder size, oxygen-acetylene flame power, spray distance and the composition of spray powder.

关 键 词：自蔓延高温合成 反应动力学 TiC/Fe涂层 氧乙炔火焰 热喷涂 

分 类 号：TB333[一般工业技术—材料科学与工程] TG174.443[金属学及工艺—金属表面处理]