铝热合成FeNiCr/NiAl-TiC涂层的时效研究  

Aging treatment of FeNiCr/NiAl-TiC composite coatings produced by thermit process

作　　者：王根龙[1] 席文君[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191

出　　处：《北京航空航天大学学报》2008年第8期916-919,共4页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(50472100)

摘　　要：用铝热反应合成工艺在钢管内表面制备出了FeNiCr/NiAl-TiC复合涂层.用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、能谱仪(EDS)和透射电子显微镜(TEM)等分析手段研究了涂层显微结构以及固溶时效对FeNiCr/NiAl-TiC涂层显微结构的影响.研究表明,FeNiCr/NiAl-TiC复合涂层由TiC,NiAl,α-FeNiCr三相组成,晶粒细小,合金基体由α-FeNi-Cr和NiAl两相组成,其中NiAl相尺寸约为100 nm.经过固溶时效,物相组成不变,TiC形态和尺寸稳定,α-FeNiCr基体中NiAl相的尺寸约为400nm,时效后NiAl和α-FeNiCr仍保持共格关系.The FeNiCr/NiAl-TiC composite coatings were prepared by thermit reaction process in a carbon steel pipe. Using scanning electron microscope （SEM） , transmission electron microscope （TEM） , X-ray diffraction （XRD） , and energy dispersive spectrum （EDS） , the microstructure of the composite coatings and effects of aging treatment on the microstructure were investigated. Results show that the FeNiCr/NiAl-TiC composite coatings are composed of titanium carbide （TIC）, intermetallic compound NiAl and ferrite （α-FeNiCr）. The alloy matrix consists of NiAl and α-FeNiCr in which the grain size of the NiA1 is about 100 nm. After aging treatment, the phase constituent of the coatings doesn＇t change. The shape and size of TiC particle are stable. The grain size of NiAl phase is about 400 nm and it is coherent with the ferrite matrix.

关 键 词：涂层 时效 TIC 铝热反应 

分 类 号：TG139[一般工业技术—材料科学与工程]