Evaluation of the phase stability, and mechanical and thermal properties of Ba(Sr 1/3 Ta 2/3 )O 3 as a potential ceramic material for thermal barrier coatings

Yupeng Cao, Quansheng Wang, Xianjin Ning*, Yanbo Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Ba(Sr 1/3 Ta 2/3 )O 3 (BST)ceramic was synthesized by a solid-state reaction method. The phase stability, microstructural evolution, and mechanical and thermal properties of the BST ceramic were investigated and characterized to evaluate the potential application of BST as a top coating material for thermal barrier coatings (TBCs). The results show that BST can maintain a stable hexagonal perovskite structure up to 1600 °C. Anisotropic growth of the grains above 1400 °C was observed. Its low elastic modulus and high fracture toughness suggest a high damage tolerance for the BST ceramic. In addition, the moderate coefficient of thermal expansion and superior heat insulation capability of the BST ceramic provide this ceramic the potential to serve as a top coating material of TBCs at higher temperature.

Original languageEnglish
Pages (from-to)12989-12993
Number of pages5
JournalCeramics International
Volume45
Issue number10
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Perovskite
  • Phase stability
  • Thermal barrier coatings
  • Thermal properties

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