超音速等离子喷涂WC/Co纳米结构涂层性能研究  

Study on Properties of WC/Co Nanostructured Coatings Prepared by Supersonic Plasma Spraying

作　　者：叶雄林[1] 马世宁[1] 李长青[1] 邓智昌[1] 

机构地区：[1]装备再制造技术国防科技重点实验室,北京100072

出　　处：《中国表面工程》2004年第1期31-34,38,共5页China Surface Engineering

基　　金：装备维修科研项目([2000]装计字第761号)

摘　　要：采用超音速等离子喷涂设备分别制备了含纳米结构和普通结构的WC/Co涂层。研究了2种涂层的结合强度、显微硬度和摩擦磨损性能,并用扫描电镜(SEM)和透射电镜(TEM)对涂层喂料(纳米WC/Co粉体)、涂层表面形貌和晶粒结构进行了分析。结果表明:含纳米结构涂层的性能优于普通的WC/Co喷涂涂层,纳米晶粒细晶强化是涂层性能提高的主要原因。Nanostructured and conventional WC/Co coatings were prepared by supersonic plasma spraying. The properties of adhesion, hardness and wear resistance of two coatings were investigated. The characterizations of the feeds and coatings were carried out by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) through examining the particle size, shape, morphology and microstructure. The results indicated that the nanostructured coating showed better properties than the conventional. The main reason of increased coating properties was the nanogranular structure.

关 键 词：WC/CO 纳米结构 超音速等离子喷涂 性能 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TB383[金属学及工艺—金属学]