无机材料学报2024，Vol.39Issue(6)：671-680,中插1-中插2,12.DOI:10.15541/jim20240001
大气等离子喷涂Y3Al5O12/Al2O3陶瓷涂层的CMAS腐蚀抗力
CMAS Corrosion Resistance of Y3Al5O12/Al2O3 Ceramic Coating Deposited by Atmospheric Plasma Spraying
摘要
Abstract
The investigation of novel materials exhibiting exceptional resistance to calcium-magnesium-aluminum-silicate(CMAS)corrosion at temperatures of 1300 ℃ and above has emerged as a pivotal objective in the advancement of environmental barrier coatings for aircraft engines in recent years.In this study,atmospheric plasma spraying(APS)technology was employed to fabricate YAG(Y3Al5O12)/Al2O3 coatings with eutectic composition,which was acknowledged as a promising material possessing outstanding CMAS corrosion resistance,thereby rendering it suitable for application in environmental barrier coatings.The as-deposited coatings were annealed at 1100,1300,and 1500 ℃ to obtain different microstructures,and the corrosion resistance as well as mechanism of YAG/Al2O3 coatings against CMAS were investigated by comparing the corrosion results after exposure to CMAS at 1300 ℃.The reaction products between YAG/Al2O3 coatings and CMAS were found to be garnet-structure solid solution,CaAl2Si2O8,and Ca2MgSi2O7.The nearly continuous distribution of the garnet-structure solid solution layer at the reaction interface between YAG/Al2O3 coating annealed at 1100 ℃ and CMAS effectively impedes the diffusion of CMAS corrosion elements.For YAG/Al2O3 coating annealed at 1500 ℃,the increase in grain size and decrease in grain boundaries reduce the dissolution rate of the coating.Both of the above can affect the competitive precipitation of various products by influencing the ion transport rate in the corrosion process,and then improve the CMAS corrosion resistance of the coating.Moreover,heat-treatment temperature can tailor grain size,which influences both dissolution-precipitation rate and competitive precipitation of reaction products during CMAS corrosion.These findings provide guidance for selecting appropriate heat-treatment temperature and offer a novel approach to optimize CMAS corrosion resistance of YAG/Al2O3 coatings through microstructure optimization.关键词
YAG(Y3Al5O12)/Al2O3/大气等离子喷涂/环境障涂层/CMAS腐蚀抗力/晶界腐蚀/热处理温度Key words
YAG(Y3Al5O12)/Al2O3/atmospheric plasma spraying/environmental barrier coating/CMAS corrosion resistance/grain boundary corrosion/heat-treatment temperature分类
化学化工引用本文复制引用
李捷,罗志新,崔阳,张广珩,孙鲁超,王京阳..大气等离子喷涂Y3Al5O12/Al2O3陶瓷涂层的CMAS腐蚀抗力[J].无机材料学报,2024,39(6):671-680,中插1-中插2,12.基金项目
国家自然科学基金(52130204,U21A2063) （52130204,U21A2063）
国家重点研发计划(2021YFB3702300) （2021YFB3702300）
辽宁省'兴辽英才计划'项目(XLYC2002018,XLYC2203090) （XLYC2002018,XLYC2203090）
中国科学院国际伙伴计划(172GJHZ2022094FN)National Natural Science Foundation of China(52130204,U21A2063) （172GJHZ2022094FN）
National Key R&D Program of China(2021YFB3702300) （2021YFB3702300）
Liaoning Revitalization Talents Program(XLYC2002018,XLYC2203090) （XLYC2002018,XLYC2203090）
International Partnership Program of the Chinese Academy of Sciences(172GJHZ2022094FN) （172GJHZ2022094FN）
