无机材料学报2018，Vol.33Issue(3)：325-330,6.DOI:10.15541/jim20170194
等离子喷涂-物理气相沉积Si/莫来石/Yb2SiO5环境障涂层
Preparation of Si/Mullite/Yb2SiO5Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)
摘要
Abstract
Environmental barrier coating (EBC) Si/3Al2O3-2SiO2/Yb2SiO5was prepared by plasma spray-physical vapor deposition (PS-PVD) on SiC/SiC ceramic matrix composites. The surface and interface of tri-layered EBC were characterized by SEM. And the phase transformation of the mullite coating was analyzed by XRD. The inter-action of feedstock powder and high temperature plasma jet was investigated. Furthermore, the deposition mecha-nism of EBC was studied. Experimental results dermonstrated that EBC with low porosity and good bonding can be obtained by PS-PVD. EBC withont micro-crack was observed on the surface of Si coating in contrast to coating mullite and Yb2SiO5coating. The size of crack in mullite surface was larger than that in Yb2SiO5coating. Low po-rous EBC was deposited by liquid droplet accompanied by gas and solid state through PS-PVD. Yb2SiO5coating was dense and formed laminar structure, mainly resulting from liquid droplet deposition. Additionally, nano-grains were observed in Yb2SiO5coating which resulted from both homogeneous and heterogeneous nucleation of vapor phase. And sub-micron/micron grains were obtained from semi-molten and splashed particles.关键词
等离子喷涂-物理气相沉积/环境障涂层/硅酸镱Key words
plasma spray-physical vapor deposition/environmental barrier coating/Yb2SiO5分类
化学化工引用本文复制引用
张小锋,周克崧,刘敏,邓春明,牛少鹏,许世鸣..等离子喷涂-物理气相沉积Si/莫来石/Yb2SiO5环境障涂层[J].无机材料学报,2018,33(3):325-330,6.基金项目
广东省科学院项目(2017GDASCX-0843) （2017GDASCX-0843）
广东省科技计划(201313050800031,201413050502008,2014B070706026,2013B061800053) （201313050800031,201413050502008,2014B070706026,2013B061800053）
广东省自然科学基金团队项目(2016A030312015)Guangdong Academy of Sciences(2017GDASCX-0843),Guangdong Technical Research Program(201313050800031,201413050502008,2014B070706026,2013B061800053) （2016A030312015）
Guangdong Natural Science Foundation(2016A030312015) （2016A030312015）
