Towards multifunctional thermal environmental barrier coatings (TEBCs) based on rare-earth pyrosilicate solid-solution ceramics

By Laura R. Turcer, N. Padture. Scripta Materialia, 2018

180 citations recorded by the source corpus.

Abstract The concept of thermal environmental barrier coatings (TEBCs) for SiC-based ceramic matrix composite (CMCs) hot-section components in gas-turbine engines is elucidated. Here, a single dense TEBC layer made of low thermal-conductivity rare-earth (RE) pyrosilicate solid-solutions is expected to perform multiple functions. Several binary solid-solutions are investigated, with some satisfying the following critical requirements for dense TEBCs: (i) good thermal-expansion match with CMCs, (ii) high-temperature phase stability up to 1700 °C, (iii) low thermal conductivity, and (iv) resistance to high-temperature attack by calcia-magnesia-aluminosilicate (CMAS) melts. Other considerations and future outlook pertaining to the TEBCs concept are discussed.

Subfields: Aerospace Engineering, Ceramics and Composites, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/fcb90b81c54eaac37ec1aec46756268e4c35bf1b

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In Aerospace Engineering

1. Daniel Tejero-Martin
2. C. Bennett
3. T. Hussain

In Ceramics and Composites

1. Daniel Tejero-Martin
2. C. Bennett
3. T. Hussain

In Materials Chemistry

1. Daniel Tejero-Martin
2. C. Bennett
3. T. Hussain

Citations in the corpus

• A review on environmental barrier coatings: History, current state of the art and future developments (2020, background): “(B) Diagram of the different polymorphs present within rare earth disilicates according to temperature [36].”