TiB2纳微米结构喂料的制备研究  

Study on preparing TiB_2 nano-microstructured feedstock for thermal spraying

作　　者：程汉池[1] 栗卓新[1] 魏琪[1] 李其连[2] 李淑青[2] 史耀武[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022 [2]北京航空制造工程研究所,北京100024

出　　处：《材料热处理学报》2008年第2期140-144,共5页Transactions of Materials and Heat Treatment

基　　金：北京市自然科学基金项目(2062005);武器装备预研基金(51461070304QT0101);北京市教委项目(KM200610005026)

摘　　要：采用喷雾干燥造粒技术和真空热处理工艺制备了TiB2纳微米结构喂料,用激光粒度仪、扫描电镜、X射线衍射等分析纳微米结构喂料的物理性能和物相组成。结果表明,团聚粉的颗粒形状、粒径分布、流动性等物理性能均满足热喷涂粉末的要求,真空热处理提高团聚粉的致密度;三阴极轴向送粉等离子喷涂TiB2纳微米结构喂料可制备较致密的TiB2复合涂层。TiB2-containing nano-microstructured feedstock was prepared by spray-drying and vacuum heat-treatment.X-ray diffraction,scanning electron microcopy,laser diffraction were applied to characterize the agglomerated particles.The experimental results show that the shape,the distribution of particles size,and the flowability of the agglomerated particles are suitable for thermal spraying.The composition of the original powder has not changed after vacuum heat treatment,the densified TiB2 composite coating can be fabricated by axial plasma spraying（Mettech Axial-Ⅲ） using nano-microstructured feedstock prepared by spray-drying followed by vacuum heat-treatment.

关 键 词：TiB2粉 喷雾干燥 真空热处理 纳微米结构喂料 轴向送粉等离子喷涂 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TB383[金属学及工艺—金属学]