Gd3+和Yb3+对CMAS腐蚀产物结晶行为的影响及协同作用机理
Synergistic Mechanism of Gd3+and Yb3+on Crystallization Behavior of CMAS Corrosion Products
摘要
Abstract
As the operating temperature of aero-engine rises,degradation of thermal barrier coatings(TBCs)and environmental barrier coatings(EBCs)on hot-section components affected mainly by infiltration of calcium-magnesium-alumina-silicate(CaO-MgO-AlO1.5-SiO2,CMAS)has garnered increasing attention.Rare earth constituents play an essential role in forming corrosion products and subsequent melt penetration when conventional TBCs and EBCs are attacked by CMAS deposits.This study focused on preparation of a series of gadolinium-ytterbium oxides((GdxYb1–x)2O3,x=0,0.05,0.10,0.20,0.30,0.50 and 1.00),with particular emphasis on the roles of ytterbium and gadolinium.Their reaction with CMAS deposits was systematically investigated at 1300℃to explore the synergistic mechanism associated with these two rare earth elements.The results indicate that gadolinium cations can efficiently induce the crystallization of products with apatite structure which have a low melt consumption.Conversely,ytterbium cations can induce the formation of products with garnet and silicocarnotite structure which have sluggish kinetics.Furthermore,partitioning of gadolinium and ytterbium ions within corrosion products,along with variation of residual CMAS melt composition,was further analyzed.It is proposed that these two rare earth ions exhibit a synergistic effect within a certain composition range(5%–20%(in mole)of gadolinium content).The optimized ratio of gadolinium and ytterbium within coatings is anticipated to promote apatite crystallization,prevent melt penetration,and modify the sluggish crystallization kinetics of garnet and silicocarnotite,thereby significantly improving the melt consumption.This investigation on synergistic effect of gadolinium and ytterbium cations provides a theoretical support for the anti-CMAS-corrosion composition modification of TBCs/EBCs.关键词
钆-镱氧化物/CMAS腐蚀/反应结晶产物/协同作用Key words
gadolinium-ytterbium oxide/CMAS corrosion/reactive crystallization product/synergistic effect分类
化学化工引用本文复制引用
张广珩,石金瑜,沈泓宇,张洁,王京阳..Gd3+和Yb3+对CMAS腐蚀产物结晶行为的影响及协同作用机理[J].无机材料学报,2026,41(1):27-36,中插1-中插3,13.基金项目
国家自然科学基金(U21A2063,52372071,52302076,92360304) （U21A2063,52372071,52302076,92360304）
国家重点研发计划(2021YFB3702300) （2021YFB3702300）
中国航发集团产学研合作项目(HFZL2023CXY022) （HFZL2023CXY022）
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项目(172GJHZ2022094FN) （172GJHZ2022094FN）
沈阳市中青年科技创新人才支持计划(RC2204062)National Natural Science Foundation of China(U21A2063,52372071,52302076,92360304) （RC2204062）
National Key Research and Development Program of China(2021YFB3702300) （2021YFB3702300）
Aero Engine Corporation of China Industry-university-research Cooperation Project(HFZL2023CXY022) （HFZL2023CXY022）
"Revitalize Liaoning Talent Plan"Project of Liaoning Province(XLYC2002018,XLYC2203090) （XLYC2002018,XLYC2203090）
Chinese Academy of Sciences International Partnership Program(172GJHZ2022094FN) （172GJHZ2022094FN）
Shenyang Young and Middle-aged Scientific and Technological Innovation Talent Support Program(RC2204062) （RC2204062）
