Thermal diffusivity of zirconium nitride in the region of homogeneity
The method of plane temperature waves in the interval of temperatures 1000-1800/sup 0/C is used to measure the thermal diffusivity of samples of zirconium nitride, obtained by the method of the through saturation of zirconium iodide, in the region of homogeneity. The result is obtained that, with an increase in the concentration of metalloid vacancies, the sign of the coefficient of the thermal diffusivity changes from negative to positive. This is connected with the electronic contribution to the thermal diffusivity, which can be considerable in materials with a defect structure. A comparison between the values of a for samples of ZrN/sub x/ of identical composition, obtained by the method of through saturation and the method of chemical gas-phase deposition, showed a considerable effect of the characater of the microstructure and the orientation of the crystallites on the thermal diffusivity of zirconium nitride.
- OSTI ID:
- 5003685
- Journal Information:
- High Temp. (USSR) (Engl. Transl.); (United States), Journal Name: High Temp. (USSR) (Engl. Transl.); (United States) Vol. 15:4; ISSN HITEA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
MICROSTRUCTURE
NITRIDES
NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
POINT DEFECTS
TEMPERATURE DEPENDENCE
THERMAL DIFFUSIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VACANCIES
VERY HIGH TEMPERATURE
ZIRCONIUM COMPOUNDS
ZIRCONIUM NITRIDES