HfC theoretical density 12.7 g / cm 3, a melting point of 3890 deg.] C, are known to the highest single compound mp. Volume resistivity of 1.95 × 10-4Ω · cm (2900 ℃), the thermal expansion coefficient of 6.73 × 10-6 / ℃. Usually hafnium oxide (HfO2) and carbon composite powder in an inert or reducing atmosphere, the reaction temperature is 1900 ~ 2300 ℃, sintering by hot pressing or hot isostatic pressing legal high density ceramic dessert.

Many of the compounds with hafnium carbide (e.g., ZrC, TaC, etc.) forming a solid solution. As component HfC-4TaC composite carbide, which was a two-phase microstructure: a phase of hafnium carbide – tantalum carbide eutectic; another phase shape ratio is 50: 1 needle-free graphite phase. This “near-eutectic” hafnium carbide (HfC) products have good thermal stability and a high melting point, can be used for rocket nozzle throat material.

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