What is hafnium carbide


Hafnium carbide (HfC) belongs to so-called "hard metals." In the periodic table, these materials are carbides of transition metals of groups IV–VI. HfC is a promising candidate for extremely high-temperature applications owing to its high melting point (>3900 °C), high hardness and elastic modulus, and good resistance to chemical attack. Given these properties, HfC is an attractive material for applications in the fields such as nuclear rocket propulsion, nuclear reactors, the space aircraft industry, and thermal-field emitters. Since the natural sources of hafnium carbide do not exist, HfC-based ceramic powders have been exclusively obtained from synthetic materials. As sintering powders normally make the majority of carbide ceramics, their properties depend, to a great extent, on the quality of the starting powders. Hafnium Compounds: Many hafnium compounds are mild irritants of the eyes, skin, and mucous membranes. In animal studies, hafnium oxychloride is toxic via the intraperitoneal route. No industrial poisonings involving hafnium have been reported. The metal is completely insoluble in water, saline solutions, or body chemicals. Exposure to hafnium can occur through inhalation, ingestion, and eye or skin contact. Hafnium carbide can be prepared by heating almost any hafnium metal and carbon source at high temperatures. Several different synthesis routes for HfC powder are available. Some of them are solid combustion synthesis by direct combination of the elements at elevated temperatures, carbothermal reduction of metal oxide compounds, vapor phase synthesis, sol–gel route, laser-induced reactions, plasma-chemical synthesis, and pyrolysis of metal-organic compounds. They can also affect the body if they are swallowed. Effects of overexposure Exposure to hafnium salts has irritated the eyes and skin in animals. Hafnium chloride has caused liver damage in animals on prolonged feeding. High-purity forms include Carbide powder, submicron powder, and nanoscale, single crystal, or polycrystalline forms. If you are looking for high quality, high purity and cost-effective Hafnium carbide, or if you require the latest price of Hafnium carbide, please feel free to email contact mis-asia.

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