基于YSZ液料的液流/雾化等离子熔射射流形态及微观组织研究  

Jet Morphology and Microstructure of Liquid Stream/Atomization Plasma Spraying Based on YSZ Suspension

作　　者：符友恒[1] 张海鸥[2] 芮道满[2] 王桂兰[1] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074 [2]华中科技大学数字制造装备与技术国家重点实验室,武汉430074

出　　处：《材料工程》2015年第3期12-17,共6页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51175203)

摘　　要：采用8%(摩尔分数)YSZ粉末(d50=700nm)配置熔射悬浮液料,比较了送料气压、熔射功率对液流和雾化等离子射流形态特征的影响。利用SEM对制备涂层的微观组织进行表征,结果表明:雾化较液流液料输送方式制备涂层组织结构更致密,两种液料输送方式下熔射距离的增加均导致部分熔融粒子增多,其有助于形成孔隙结构。基于雾化送料制备了厚度为30μm,孔隙率为1.5%的精细结构YSZ涂层,可用于固体氧化物燃料电池的电解质层。8% （mole fraction）YSZ powder （d50 = 700nm） was used for suspension. A comparative study was conducted on the influence of different injection pressure and plasma power on the plasma jet morphologic characteristic with liquid stream/atomization injection. The microstructures of pre- pared coating was characterized by SEM method. The results show that more compact layers are ob- tained with atomization injection compared with liquid stream injection. As the spraying distance in- creases, more semi-melted particles are observed for both injection methods, which are beneficial for forming pore structure. Finely structured YSZ layers with 30μm thickness and 1.5 % porosity are fab- ricated by atomization injection,which can be used as electrolyte layer of solid oxide fuel cell.

关 键 词：液流 雾化 液料等离子熔射 精细结构 

分 类 号：TG174.44[金属学及工艺—金属表面处理]