Tantalum Carbide ceramic is a ceramic that contains a seven-crystal phase of Tantalum Carbide


Aug 1, 2023

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What is Tantalum carbide? Tantalum carbide (TaC), a binary material consisting of Tantalum & carbon, has an empirical formula of TaCX. The range for X is typically between 0.4 – 1. Metal-conductive ceramics that are extremely hard and brittle. The brownish gray powder is usually sintered.
Tantalum Carbide can be found in cutting and grinding tools, as well as being added to alloys containing tungsten Carbide.
Tantalum carbide ceramics contain seven crystal phases of Tantalum carbide. The chemical formula of TaC, a face-centered cube lattice. The theoretical density of Tantalum Carbide is 1.44. Its melting point is between 3730 and 3830 degrees Celsius. This is the most significant value of all binary compounds. Hafnium carburide is the only binary compound with a higher melting temperature, around 3942 deg C.

TaCX Powders of the required component are prepared by heating a tantalum powder and graphite in a vacuum (argon) or in an atmosphere of inert gases. The heating at 2000degC can be done using an arc melter or furnace. In a vacuum or hydrogen-filled atmosphere, tantalum is reduced with carbon by reducing it in 1500-1700degC. Tantalum Carbide, a product of this method, was first produced in 1876. But the lack stoichiometric measurement of the final product caused the production to be reported as a direct TaC by high-temperature self-spreading.
Tantalum’s bonding with carbon atoms is complex, involving ions, covalent contributions, and metals. The strong covalent structure of these carbides makes them very hard and fragile. TaC for example has a hardness of 160-2 000 kg/mm2[16]( 9 mohs) with an elastic modulus at 285 GPa. The corresponding values are 110 kg/mm2[16] for tantalum and 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.
What is the strength level of tantalum carbide?
Tests of Vickers Hardness, Fracture Toughness, and Relative Density of a sample series confirm that TaC possesses best mechanical properties when tested under 5.5 GPa at 1300 degC. TaC has a relative density of 97.7%. It also has a fracture toughness of 7.4 MPa m1/2, as well as a Vickers Hardness 21.0 GPa.

What are the uses of tantalum carburide?
Tantalum carbide is chemically insoluble and stable. TaC’s antioxidant properties are strong. TaC is synthesized in an inert, reductive or inert atmosphere from tantalum hexoxide and black carbon as a brass-like powder. Hot pressing and sintering produces products with a high density, metallic luster. Additives for aerospace materials. Tantalum carbide is an metallic powder with cubic crystals of sodium chloride. It’s a brownish-light powder. It is insoluble with water and inorganic acids. However, it is soluble when mixed with hydrofluoric, and nitric, acid. It is easily decomposed and melted with potassium pyrosulfate. The electrical conductivity is high, and the resistance is 30O at room temperature, indicating superconductivity.
What are the uses of tantalum carburide? Tantalum carbide has excellent physical properties. It is widely used in the sintering of ultra-high temperature (UHTC) ceramics or as a ceramic in high-entropy (HEA) alloys.
Tantalum carbide can be added to powder metals, fine ceramics (for cutting tools), chemical vapor deposition and hard-wear alloy tools. It also improves the toughness of structural alloys. Titanium Carbide is available in golden yellow sintered form and can also be used for watch ornaments. Tantalum Carbide is also used to prevent grain growth when sintered cemented Carbide of a density of 14,3g/cm3 is produced.

Is tantalum carbide toxic?
Tantalum Compounds. The systemic toxicities of tantalum oxide and metallic tantalum are low. This is due to their poor solubility. Carbides : Pure carbon is very low in toxicity for humans. It can be safely handled, and even ingested as graphite or charcoal.
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According to the journal Scientific Reports, a team of researchers at Imperial College London determined that the melting points of Tantalum Carbide at 8:2 are 3768 deg C (for the ceramic) and hafnium Carbide at 3958 deg C (for the metal).
Tantrum Carbide (also known as hafnium Carbide) and hafnium Carbide resist high temperatures better than all other materials. They protect the spacecraft against the extreme heat during exit or reentry.
Omar Sediroth Baraza, a researcher, said that future supersonic flights could use Tantalum Carbide (or hafnium Carbide) for the nose cap, scientific equipment, and other components of the spacecraft. It could also make supersonic aircraft shells, which could fly from London and Sydney in only 50 minutes.

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