What is Tantalum-Carbide?
Tantalum Carbide (TaC) is an binary compound that consists of Tantalum or carbon. Its empirical formula is TaCX. X can vary in a range from 0.4 to 1 usually. They are extremely tough, hardy, and fragile refractory ceramic materials that can be metal-conductive. They come as a brownish-gray powder, and they are often sintered.
Tantalum Carbide can be used as a cermet and commercially for cutting tools. Sometimes, it is added to the tungsten Carbide alloys.
Tantalum-Carbide ceramic is made from a ceramic with a seven crystal phase of Tantalum Cabide. TaC stands for face-centered cubular lattice. Based on purity and measurements, the theoretical density was 1.44. This number is among the most high-ranking binary compounds. This value is the highest among binary compounds. Hafnium Carbide has an approximately 3942 degree C melting point. While hafnium Carbaide’s melting point is similar to TaC, it has an slightly lower melting temperature.
TaCX Powders are made from the components by heating mixture of graphite and tantalum in vacuum or an inert atmosphere (argon) to prepare them. An arc melting or furnace heats the mixture to around 2000°C. You can also reduce tantalum Pentoxide by adding carbon to it in either a vacuum or hydrogen atmosphere, at temperatures between 1500-1500C. Tantalum Carbide was prepared using this method in 1876. Due to its lack of stoichiometric monitoring, the production of TaC directly from the elements via self-spreading and high-temperature syntheses is possible.
A complex combination of ions and metals makes it possible to bond tantalum with the carbon atoms within carbides. Due to their covalent structure, carbides are extremely hard and brittle. TaCX, for example, has a microhardness range of 160 to 2000 kg/mm2  (9mohs), and an elastic modulus that is 285 GPa. Tantalum, on the other hand, has a value of 110 kg/mm2 but 186 GPa.
Tantalum Carbide is electrically conductive to metals, both size and temperature-dependent.TaC is a kind of superconductor with high transition temperature Tc = 10.35 K.
Is tantalum carbide as strong?
Tests of Vickers hardness, fracture toughness and relative density were done on a variety of samples. It was found that TaC has excellent mechanical properties, with a melting point of 5.5 GPa. TaC has a relative density of 7.4 MPa m1/2 as well as Vickers hardness at 97.7%.
For what purpose is tantalum-carbide used?
Tantalum Carbide is chemically stable, and it was not soluble in acids. The antioxidant properties of Tantalum Carbide are strong. They were usually prepared from tantalum pentoxide in an inert atmosphere or reductive atmosphere. By hot pressing, sintering is possible to produce high-density products and metallic luster. They are used in aerospace and cement carbide additives. Tantalum Carbide, a metallic white cubic crystal powder of the sodium-chloride type cubic crystals system is light brown. It is insoluble and insoluble with water. However, it can be dissolved in hydrofluoric and nitric acids. It can be easily melted to decompose by potassiumpyrosulfate and has a strong resistance against oxidation. It has high electrical conductivity and a large resistance at room temperatures of 30O.
For what purpose is tantalum-carbide used?
Due to its outstanding physical properties (e.g. melting point and hardness), thermal shock resistance, thermal conductivity and chemical stability, tantalum carbide has been widely used in sintering in ultra high temperature ceramics (UHTCs), or as ceramic reinforcement in high entropy alloys.
Tantalum carbide is an additive in powder metallurgy. Titanium Carbide can be worn as an ornament on watches because of its sintered body. Tantalum Carbide is also an inhibitor for grain growth in sintered cemented Carbide. It has a density 14.1g/cm3.
Is tantalum carbide toxic?
Tantalum Compounds – The systemic toxicity of tantalum dioxide and metallic tantalum are low. Its solubility is likely to be a factor. Carbides – Pure carbon can be safely handled, and even consumed in the form graphite or charcoal.
Poseidon is a deep, unmanned submersible
2016: A London team discovered Tantalum Carbide or TaC and hafnium Carbide (HfC) can be withstand temperatures up to 4,000°C.
Tantrum Carbide as well as hafnium Carbide have a higher resistance to heat than other known materials. They shield a spacecraft against the heat from exit or reentry.
Omar Sediroth Baraza (researcher) stated that spacecraft’s nose caps and scientific equipment need high-temperature resistance materials. Tantalum Carbide and hafnium Carbide may be useful for supersonic future missions. You could use it to create shells for supersonic airplanes that can fly in under 50 minutes from London to Sydney, creating new opportunities worldwide.
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