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
- Johns Hopkins Univ, Laurel, MD (United States)
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
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Related Subjects
36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
CORROSION RESISTANCE
DIFFRACTION
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
OXIDATION
PROTECTIVE COATINGS
REFRACTORY METAL COMPOUNDS
SCATTERING
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
BORIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
CORROSION RESISTANCE
DIFFRACTION
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
OXIDATION
PROTECTIVE COATINGS
REFRACTORY METAL COMPOUNDS
SCATTERING
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION