无机材料学报2026，Vol.41Issue(7)：923-929,7.DOI:10.15541/jim20250452
Al表面改性Si-HfO2/YbDS/GYYZO热/环境障涂层的抗CMAS腐蚀性能
CMAS Corrosion Resistance of Al-modified Si-HfO2/YbDS/GYYZO Thermal/Environmental Barrier Coating
摘要
Abstract
The rising service temperature of aero-engine hot-section components makes calcium magnesium aluminum silicate(CMAS)corrosion a key failure mechanism for thermal/environmental barrier coatings(T/EBCs).The novel Gd2O3-Yb2O3-Y2O3 co-stabilized ZrO2(GYYZO)ceramic is promising due to its good thermophysical properties.However,its CMAS corrosion resistance at 1500℃needs improvement.In this work,a PS-PVD-fabricated Si-HfO2/Yb2Si2O7/GYYZO coating system was enhanced via Al deposition and vacuum heat treatment.Firstly,the as-sprayed coating was annealed at 1300℃to heal microcracks.Subsequently,a 3-4 μm thick aluminum film was deposited on the GYYZO layer surface via direct current pulsed magnetron sputtering.Finally,vacuum heat treatment(400℃/2.5 h+660℃/2 h+808℃/1.5 h+980℃/1 h)was conducted to promote the formation of a dense Al2O3 barrier layer.A comparative study at 1500℃revealed that CMAS rapidly penetrated the unmodified GYYZO coating along grain boundaries,causing blistering and cracking in the Yb2Si2O7 layer and accelerating failure.Conversely,the Al-modified GYYZO coating formed a dense Al2O3 barrier in situ,effectively suppressing CMAS penetration and slowing corrosion kinetics,thus maintaining structural integrity after 1 h.关键词
热/环境障涂层/CMAS腐蚀/铝改性/GYYZOKey words
thermal/environmental barrier coating/CMAS corrosion/aluminum modification/GYYZO分类
化学化工引用本文复制引用
商森,姜林文,董浩,戴睿,吴健,卓学士,张军贵,张小锋..Al表面改性Si-HfO2/YbDS/GYYZO热/环境障涂层的抗CMAS腐蚀性能[J].无机材料学报,2026,41(7):923-929,7.基金项目
四川省科技计划(2025ZDZX0003)Sichuan Science and Technology Program(2025ZDZX0003) （2025ZDZX0003）
