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US 12,703,668 B2Granted
Hafnon and zircon environmental barrier coatings for silicon-based components
AssigneeRtx Corporation
InventorsXuan Liu, James T. Beals, Xia Tang, Richard Wesley Jackson, III, William J. Joost
Life of this patent
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Abstract
A method for coating a substrate includes spraying a combination of powders. The combination of powders includes: Hf0.5Si0.5O2; Zr0.5Si0.5O2; and, optionally, at least one of HfO2 and ZrO2. A molar ratio of said Hf0.5Si0.5O2 and HfO2 combined to said Zr0.5Si0.5O2 and ZrO2 combined is from 2:1 to 4:1. A molar ratio of said Hf0.5Si0.5O2 to said HfO2 is at least 1:3.
Claims20
A coated substrate comprising:
- a substrate;
- and
- a coating layer atop the substrate and comprising:
- at least 25.0 volume %, exclusive of porosity, a first phase being a solid solution of Hf1-xZrxSiO4;
- and
- at least 25.0 volume %, exclusive of porosity, a second phase being a solid solution of Hf1-yZryO2.
3 more elements
Dependencies are inferred from the claim text.