Corrosion of tri-layer LaMgAl11O19/Yb2SiO5/Si environmental barrier coatings with molten calcium-magnesium-alumina-silicate (CMAS)
Source abstract
Abstract
Corrosion behavior of calcium-magnesium-alumina-silicate (CMAS) coated on LaMgAl 11O 19/Yb 2SiO 5 /Si environmental barrier coatings are studied. The results show that a dense layer of anorthite is formed under short-term corrosion at 1300 °C (>5 h). After 25 h, CMAS melt penetrates and dissolves the LaMgAl 11O 19 layer along the pores, crystallizing with the Yb 2SiO 5 front. At 1400 °C for 5 h, the CMAS melt reacts vigorously with the coating and penetrates the LaMgAl 11O 19 layer, forming large pores and the production of garnet solid solution and Ca 2(Yb, La) 8(SiO 4) 6O 2. After 50 h, the Yb 2SiO 5 layer completely dissolves, leaving residual CMAS on top of the thermally grown oxide layer.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Temperature Coating Behaviors · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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