Glass‐Ceramic Coatings for Titanium Aluminides
- 1 April 1994
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 77 (4) , 1098-1100
- https://doi.org/10.1111/j.1151-2916.1994.tb07278.x
Abstract
Four glass‐ceramic coatings have been successfully developed to function as both hydrogen barriers and oxidation protection on super α‐2 titanium aluminide. The coefficients of thermal expansion (88 × 10–7/°C to 117 × 10–7/°C) of these coatings provide a good match with that of the alloy, and the coatings show excellent adherence in thermal cycling to 982°C. In addition, the four coatings have measured emittances from 0.67 to 0.80 at this temperature. Finally, the coatings display the desired low hydrogen and oxygen permeation characteristics.Keywords
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