反应火焰喷涂TiC/Fe金属陶瓷复合涂层的组织结构  

Microstructure of TiC/Fe composite coatings prepared by reactive flame spraying

作　　者：李志文[1] 刘长松[1] 黄继华[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：《北京科技大学学报》2007年第6期599-602,共4页Journal of University of Science and Technology Beijing

基　　金：山东省教育厅重大项目(No.J05D08);河南省杰出人才创新基金资助项目(No.0421001000);青岛市科技发展计划项目(No.05-1-Jc-89)

摘　　要：采用钛铁矿粉、石墨粉和铁粉为主要原料,利用反应火焰喷涂技术成功制备了TiC/Fe金属陶瓷复合涂层.采用X射线衍射仪、扫描电镜、透射电镜等手段,研究了涂层的显微组织结构.结果表明,反应火焰喷涂TiC/Fe复合涂层主要由TiC和Fe两相组成.涂层具有多层多相的结构,即由TiC含量不同的片层交替叠加而成;在富TiC片层中,大量的、比较细小的(粒度小于0.5μm)、大致呈球形的TiC颗粒弥散分布在Fe基体上.这种显微组织结构有利于改善金属陶瓷涂层的耐磨性能.TiC/Fe composite coatings were successfully obtained by reactive flame spraying （RFS） with ilmenite, graphite and ferrous powder as rough materials. The microstructure of the composite coatings and the relations among their wear properties, phases and microstructure were investigated by X-ray diffraction, scanning electron microscopy and transaction electron microscopy. The results show that the composite coatings mainly consist of TiC and Fe phases and were composed of alternate soft and hard layers with different TiC contents. In the TiC-rich layers, lots of submicron （ 〈 0.5 μm） and approximately round TiC particles are dis- persed in the iron matrix. This multiphase and multilayer coatings will be helpful to improve the wear resistance of cermet composite coatings.

关 键 词：金属陶瓷 涂层 TIC/FE 显微结构 自蔓延高温合成(SHS) 

分 类 号：TG174[金属学及工艺—金属表面处理]