SYNTHESIS AND PYROLYSIS OF METAL ALKOXIDES AS POTENTIAL REFRACTORY OXIDE COATINGS FOR GRAPHITE
Technical Report
·
OSTI ID:4704094
The vapor-phase deposition of hafnia and zirconia on graphite substrates by decomposition of the isopropyl and tertiary butyl alkoxides was investigated. The infrared spectra of the isopropoxides of zirconium and hafnium were obtained. Thorium isopropoxide infrared data were also obtained and the spectra compared with titanium and aluminum isopropoxides. The tertiary butoxides show more promise for coating applications because of their higher vapor pressures. The vapor pressures and decomposition temperatures of the zirconium and hafnium butoxides were studied. Preliminary data on the oxidation resistance to 1000 deg C of various grades of graphite coated by this method are reported. The results indicate a potential route to more protective refractory coatings than currently available. (auth)
- Research Organization:
- Aeronautical Systems Div., Wright-Patterson AFB, Ohio
- NSA Number:
- NSA-17-027727
- OSTI ID:
- 4704094
- Report Number(s):
- ASD-TDR-63-322
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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