Two multi-component sol-gel compositions were developed and compared to several commercially available high-temperature glasses. All were then used and characterized as protective coatings for intermetallic titanium aluminide.
The sol-gels were studied as thin film coatings and the commercial glasses were studied as enameled coatings. Attention was given to (1) the effect of the application temperature on the original microstructure of the metal, and (2) the role of interfacial conditions between the glass and metal in cyclic and isothermal thermal cycles between ambient temperature and 760°C (1400°F).
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C. A. Barrett, Oxidation of Metals, Vol. 30, 1988.
Carol S. Ashley, Scott T. Reed, “Sol-Gel-Derived AR Coatings for Solar Receivers,” Sandia National Laboratories, 1984.
Helmut Dislich, “Thin Films from the Sol-Gel Process,” Sol-Gel Technology for Thin Films. Fibers. Preforms. Electronics and Specialty Shapes, Ed., Lisa C. Klein, Noyes Publications, 1988.
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Devore, L.J., Osborne, N.R. Glasses and Multi-Component Sol-Gels for Use as High-Temperature Protective Coatings. MRS Online Proceedings Library 180, 473 (1990). https://doi.org/10.1557/PROC-180-473