Fabrication of TiB_2 composite powders coated with BN by high speed airflow impact  

作　　者：冯彩梅 王为民 傅正义 

机构地区：[1]State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

出　　处：《中国有色金属学会会刊：英文版》2005年第2期238-242,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project(50372047) supported by the National Natural Science Foundation of China

摘　　要：TiB2 powders coated with BN were prepared by Hybridization System making use of dry impact blending method to achieve powder surface modification. Parameters of coating were analyzed and the most appropriate condition was summarized. Scan electron microscope of JSM-5610LV and transmission electron microscope of H-600STEM/EDS were used to observe the microstructure of coated powders. Results show that treatment time, rotation speed, granularity ratio of TiB2 to BN, pretreatment of materials etc influence the coating results evidently. Mixing raw materials and coating with BN under the appropriate condition can get round TiB2/BN composite powder with smooth surface and compact coating layer.TiB_2 powders coated with BN were prepared by Hybridization System making use of dry impact blending method to achieve powder surface modification. Parameters of coating were analyzed and the most appropriate condition was summarized. Scan electron microscope of JSM-5610LV and transmission electron microscope of H-600STEM/EDS were used to observe the microstructure of coated powders. Results show that treatment time, rotation speed, granularity ratio of TiB_2 to BN, pretreatment of materials etc influence the coating results evidently. Mixing raw materials and coating with BN under the appropriate condition can get round TiB_2/BN composite powder with smooth surface and compact coating layer.

关 键 词：高速气流撞击 混合系统 电镀工艺 二硼化钛陶瓷 氮化硼 复合粉末 

分 类 号：TQ174[化学工程—陶瓷工业]