喷涂距离对感应耦合等离子体喷涂B_4C/W涂层结合强度的影响  

Effect of Spray Distance to the Adhesion Strength of Inductively Coupled Plasma Sprayed B_4C/W Coating

作　　者：周秋娇 赵鹏[1] 郭起家 李琳 孟月东 Zhou Qiujiao;Zhao Peng;Guo Qijia;Li Lin;Meng Yuedong(Institute of Plasma Physics Hefei Institutes of Physical Science Chinese Academy of Sciences,Hefei 230031 China;University of Science and Technology of China,Hefei 230026 China)

机构地区：[1]中国科学院合肥物质科学研究院等离子体所,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《电工技术学报》2019年第6期1345-1350,共6页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(11775271);国家自然科学基金青年基金项目(11405221)资助

摘　　要：B_4C材料可用作原位保护涂层防止托卡马克面向等离子体部件中的钨块受到诸如腐蚀、开裂以及颗粒溅射等损伤。本文采用感应耦合等离子体(ICP)喷涂法在惰性气氛下制备B_4C/W涂层,对不同喷涂距离下的涂层进行结合力研究,并对其表面形貌进行分析,同时还对涂层的物相及组成成分进行了分析。不同喷涂距离下的拉伸测试结果展示了涂层结合强度的变化趋势,结果表明,在喷涂距离比较近时涂层的结合强度反而较弱。优化条件下的涂层结合强度值为5.32MPa。涂层表面形貌的SEM图像分析,进一步验证了结合强度的研究结果。与初始B_4C粉末相比,涂层的主要相成分和化学成分没有发生改变。B4C was proposed as a material of in-situ protecting coating to avoid damages like erosion,cracking and particle emission on tungsten tiles of tokamak plasma facing components.This study involved the fabrication and adhesion testing of inductively coupled plasma(ICP)plasma sprayed B4C coating on tungsten(W)substrate.Coating optimization for B4C on different spray distances was performed.Adhesion test result reveals the tendency of the coating adhesion strength,which increases along with the increasing spray distance.The adhesion strength of the coating on optimized conditions is 5.32MPa.Coatings characterization was presented with scanning electron microscope(SEM)analysis,which further proves the result of adhesion strength.Phase and composition analyses show that the main phase and chemical composition of the boron carbide coating is not changed after ICP torch treatment.

关 键 词：碳化硼 感应耦合等离子体 热喷涂 结合强度 

分 类 号：O539[理学—等离子体物理]