Skip to content

Atlas / Learn / Papers / 20190029593

NASA NTRS · Poster

Molten Silicate Reactivity with Environmental Barrier Coating Materials for Gas Turbine Engine Applications

Published 2019-08-27 From Glenn Research Center 4 authors
Read paper (PDF) ↗ View on NASA NTRS ↗

Attribution

This is the abstract and citation. Full text lives at NASA NTRS — we link out rather than host. All credit to the authors and Glenn Research Center.

Abstract

Verbatim from NASA NTRS. Not paraphrased, not summarized.

Rare earth (RE) disilicates are utilized in environmental barrier coatings (EBCs) to protect SiC-based ceramic matrix composites (CMCs) from destructive reactions with water vapor and other combustion species. These coating materials, however, degrade when exposed to molten silicate deposits primarily composed of calcium-magnesium aluminosilicates (CMAS). Coating materials are exposed to CMAS by engine ingestion of dust particulates from terrestrial sources during operation. Due to continual increases in engine operating temperature, it is important to understand the high temperature thermochemical mechanisms that drive corrosion of these materials. This work focuses on characterizing reaction products between disilicates and CMAS and optimizing coating chemistries to mitigate damage.

Authors

  • Stokes, Jamesa L. Pennsylvania State Univ.
  • Harder, Bryan J. NASA Glenn Research Center
  • Wiesner, Valerie L. NASA Glenn Research Center
  • Wolfe, Douglas E. Pennsylvania State Univ.

Citation: Stokes, Jamesa L., Harder, Bryan J., Wiesner, Valerie L. , et al. (2019). Molten Silicate Reactivity with Environmental Barrier Coating Materials for Gas Turbine Engine Applications. Glenn Research Center. NASA NTRS ID 20190029593. https://ntrs.nasa.gov/citations/20190029593 ↗