High-temperature corrosion of the Gd4Al2O9 ceramics exposed to calcium–magnesium–aluminum-silicate melts
Source abstract
Abstract
Conventional thermal barrier coatings (TBCs) are susceptible to degradation by molten calcium–magnesium–aluminum-silicates (CMAS) at high temperature. In this work, Gd 4Al 2O 9 ceramics is proposed as a CMAS-resistant material for TBCs and hot corrosion behavior under CMAS attacks have been investigated. Spark plasma sintering Gd 4Al 2O 9 ceramic bulk specimens show high CMAS-resistance at high temperature range 1260–1500 °C. The hot corrosion products are Ca 2Gd 8(SiO 4) 6O 2 apatite, CaAl 2Si 2O 8 anorthite and MgAl 2O 4 spinel. The formation of hot corrosion products can consume a portion of CMAS, and block the voids in the ceramic bulk, preventing the melt form penetrating the interior of the ceramic bulk.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Advanced ceramic materials synthesis · Nuclear materials and radiation effects
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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