粉末电爆喷涂方法制备Ti_(3)SiC_(2)涂层  

Preparation of Ti_(3)SiC_(2) coating by electrical explosion powder spraying method

作　　者：刘宗瀚 朱亮[1,2] 林巧力[1,2] 张爱华[3] 李楚 Liu Zonghan;Zhu Liang;Lin Qiaoli;Zhang Aihua;Li Chu(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal,Lanzhou University of Technology,Lanzhou Gansu 730050,China;College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050 [3]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《金属热处理》2021年第1期138-142,共5页Heat Treatment of Metals

摘　　要：在自制的连续送粉电爆喷涂设备上,以Ti_(3)SiC_(2)粉末为电爆喷涂材料制备了Ti_(3)SiC_(2)涂层。根据所制备涂层的表面形貌和截面特征,分析了充电电压、粉末粒径、石墨掺入量对电爆喷涂过程的影响。结果表明,粉末粒径为28μm,充电电压高于15 kV、掺入的石墨粉为10%时,涂层沉积率较高,均匀性较好。XRD分析表明,涂层由TiC与Ti_(3)SiC_(2)组成。采用胶结对偶试样拉伸试验法测定的涂层结合强度大于37 MPa。分析认为,掺和石墨粉可提高电爆时粉末的导电性,减少粉末粒子外边缘的沿面放电,使粉末获得更加充分的加热,有利于涂层的形成。Ti_(3)SiC_(2) coating was prepared with Ti_(3)SiC_(2) powder as electrical spraying material by using self-made continuous powder-feeding electrical explosion spraying equipment.According to the surface morphologies and cross-sectional characteristics of the prepared coating,the effects of charging voltage,powder particle size,and graphite blending amount on the electrical explosion spraying process were analyzed.The results show that when the particle size of the powder is 28μm,the charging voltage is higher than 15 k V,and the appropriate amount of graphite powder is 10%,the coating deposition rate is higher and the uniformity is better.The XRD analysis results show that the coating is composed of Ti C and Ti_(3)SiC_(2).The bonding strength of the coating determined by using the cemented dual sample tensile test method is greater than 37 MPa.Therefore,graphite powder blending can improve the conductivity of the powder during electrical explosion,reduce the surface discharge of the outer edge of the powder particles,make the powder to be heated more thoroughly,and help the coating formation.

关 键 词：电爆喷涂 Ti_(3)SiC_(2)涂层 涂层形貌 

分 类 号：TG174.44[金属学及工艺—金属表面处理]