Robust High Temperature Environmental Barrier Coating System for Ceramic Matrix Composite Gas Turbine Components using Affordable Processing Approach

Period of Performance: 05/19/2015 - 05/18/2017

$749K

Phase 2 SBIR

Recipient Firm

Directed Vapor Technologies Internationa
2 Boars Head Ln Array
Charlottesville, VA 22903
Firm POC
Principal Investigator

Abstract

Research is proposed to demonstrate the use of advanced manufacturing techniques to enable the affordable application of multi-functional thermal/environmental barrier coatings (T/EBCs) having enhanced resistance to high temperature combustion environments. T/EBCs are envisioned to protect the surface of Si-based ceramics against moisture-assisted, oxidation-induced ceramic recession. Current T/EBC systems have been demonstrated in long time exposures at ~2400 F substrate temperatures. However, their use at elevated temperatures (i.e., 2700 F substrate temperatures) is limited by the low temperature stability and high diffusion activity of current T/EBC materials. One approach to increase the temperature capability of these systems is the incorporation of multilayered T/EBC designs. In this effort, enhanced processing techniques will be employed to demonstrate the manufacture of robust T/EBC systems using a physical vapor deposition based processing approach which enables improved coating adhesion and advanced coating architectural, compositional, and microstructural control, as well as non-line-of-sight (NLOS) deposition. During this proposed Phase II effort, processing/property/performance relationships for the manufacture of the novel coating architectures will be determined. Optimized processing approaches will then be used to demonstrate the deposition of high temperature capable T/EBC systems coating onto components of interest to gas turbine engine manufacturers.