CMAS-Resistant Plasma Sprayed Thermal Barrier Coatings Based on Y 2 O 3 -Stabilized ZrO 2 with Al 3+ and Ti 4+ Solute Additions
作者： Bilge S. Senturk , Hector F. Garces , Angel L. Ortiz , Gopal Dwivedi , Sanjay Sampath
DOI: 10.1007/S11666-014-0077-2
关键词:
摘要: The higher operating temperatures in gas-turbine engines made possible by thermal barrier coatings (TBCs) are engendering a new problem: environmentally ingested airborne silicate particles (sand, ash) melt on the hot TBC surfaces and form calcium-magnesium-alumino-silicate (CMAS) glass deposits. molten CMAS degrades TBCs, leading to their premature failure. Here, we demonstrate use of commercially manufactured feedstock powder, conjunction with air plasma spray process, deposit CMAS-resistant yttria-stabilized zirconia-based TBCs containing Al3+ Ti4+ solid solution. Results from characterization these CMAS/TBCs interaction experiments presented. mitigation mechanisms involve crystallization anorthite phase. Raman microscopy is used generate large area maps phase CMAS-interacted demonstrating potential usefulness this method for studying interactions. ubiquity sand/ash ever-increasing demand future high efficiency will necessitate resistance all hot-section components those engines. In context, versatility, ease processing, low cost offered process demonstrated here could benefit development TBCs.
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