PREPARATION AND PROPERTIES OF HfC (in Russian)
Journal Article
·
· Zhur. Priklad. Khim.
OSTI ID:4838661
An analysis is made of the preparation of HfC in vacuum according to the reaction HfO/sub 2/ + 3C = HfC + 2CO, using 99.37% HfO in stoichiometric composition with anthracite black with 0.07% ash and heated at 1000 to 2000 deg C. Dense specimens are prepared by hot pressing hafnium carbide powder at 3000 deg C. The specific conductivity of the HfC is 51.5 mu OMEGA - cm; electromotive force in vapor with lead is 18 mu v/C deg , elasticity modulus 359000 kg/mm/sup 2/, coefficient of thermal expansion 6.06 x 10/sup -6//C deg , emission coefficient as 800 to 1600 deg (with lambda = 0.655 m mu ) is 0.77. The data are compared with physical properties of TiC and ZrC crystals. (R.V.J.)
- Research Organization:
- Inst. of Metal Ceramics and Special Alloys, Academy of Sciences, Ukranian SSR
- NSA Number:
- NSA-15-028082
- OSTI ID:
- 4838661
- Journal Information:
- Zhur. Priklad. Khim., Journal Name: Zhur. Priklad. Khim. Vol. Vol: 34
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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Related Subjects
CARBON
CARBON MONOXIDE
CHEMICAL REACTIONS
COAL
CRYSTALS
ELASTICITY
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
EMISSION
EXPANSION
HAFNIUM CARBIDES
HAFNIUM OXIDES
HIGH TEMPERATURE
HOT WORKING
LEAD
METALS, CERAMICS, AND OTHER MATERIALS
POWDERS
PREPARATION
PRESSURE
STANDARDS
TITANIUM CARBIDES
VACUUM
VAPORS
ZIRCONIUM CARBIDES
CARBON MONOXIDE
CHEMICAL REACTIONS
COAL
CRYSTALS
ELASTICITY
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
EMISSION
EXPANSION
HAFNIUM CARBIDES
HAFNIUM OXIDES
HIGH TEMPERATURE
HOT WORKING
LEAD
METALS, CERAMICS, AND OTHER MATERIALS
POWDERS
PREPARATION
PRESSURE
STANDARDS
TITANIUM CARBIDES
VACUUM
VAPORS
ZIRCONIUM CARBIDES