Thermophysical properties for hafnium carbide (HfC) versus temperature from 2000 to 5000 K (experiment)

• Published in: Journal of materials science Vol. 55; no. 28; pp. 13559 - 13568
• Main Authors: Savvatimskiy, A. I., Onufriev, S. V., Valyano, G. E., Muboyadzhyan, S. A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-10-2020; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Enthalpy; Flat surfaces; Hafnium carbide; Hydrofluorocarbons; Liquidus; Materials Science; Polymer Sciences; Radiance; Solid Mechanics; Solidus; Thermophysical properties; Thickness
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-020-04959-y

Hafnium carbide HfC (at%: 42%C; 49%Hf; 7%O) was investigated under rapid heating by a current pulse, in a time of 5–8 μs. The temperature was measured by radiance of a flat surface of a carbide plate (thickness 130 microns) at a given emissivity. This carbide plate was clamped between two K-8 plates, to prevent evaporation of the carbide and to prevent surface discharge at high voltage along the sample. Input specific energy (enthalpy), melting heat, solidus and liquidus temperatures (4000–4200 K), electrical resistance and heat capacity for solid and liquid states were measured up to 5000 K.