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Oxidation mechanisms of hafnium carbide and hafnium diboride in the temperature range 1400 to 2100 C

Journal Article · · Johns Hopkins APL Technical Digest; (United States)
OSTI ID:6254328
Two ultra-high-temperature materials, hafnium carbide and hafnium diboride, were oxidized in the temperature range 1400 to 2100 C. The two materials oxidized in distinctly different ways. The carbide formed a three-layer system consisting of a layer of residual carbide, a layer of reduced (partially oxidized) hafnium oxide containing carbon, and a layer of fully oxidized hafnium dioxide. The diboride oxidized into only two layers. For the diboride system, the outer layer, mainly hafnium dioxide, contained several intriguing physical structures. 14 refs.
OSTI ID:
6254328
Journal Information:
Johns Hopkins APL Technical Digest; (United States), Journal Name: Johns Hopkins APL Technical Digest; (United States) Vol. 14:1; ISSN 0270-5214; ISSN JHADDQ
Country of Publication:
United States
Language:
English