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What is titanium carbide?
TiC is a light gray cubic crystal, which is not soluble in water. It has a high chemical stability and can be dissolved by aqua regia or nitric and hydrofluoric acids.
TiC has a metallic luster and is gray with an iron grey color. It belongs to a simple cubic NaCl structure. The lattice is 0.4329 nanometers. The space group Fm3m. TiC has strong covalent bonding between the carbon atoms, and titanium atoms. These bonded atoms are similar in many ways to metals. For example, they have a high melting temperature, high boiling temperatures, high hardness and good electrical conductivity. They also show superconductivity, even at very low temperatures. TiC can be used in the production of heat-resistant metals, cemented carbide, anti-wear material, high temperature radiation materials, and other high-temperature equipment.
Method of synthesis of titanium carbide
As raw materials, titanium dioxide and carbon black are used.
The dry powder mixture of high-purity titania dioxide and carbon black is mixed proportionally and then press-formed under a hydrogen-filled atmosphere in either a horizontal carbon-tube furnace or vertical carbon-tube furnace. At 19002300degC reduction to get block TiC and then pulverization for titanium carbide product. As an alternative, carbon black and sponge titanium can be mixed together and heated at 1500-1750degC using a hydrogen stream of high purity. Titanium carbide.
Direct carbonization of Titanium Metal:
Titanium powder (reduced or decomposed titanium hydride less than 325 mesh), mixed with black carbon and molded, is heated up to 1500-17degC using a high-purity stream of hydrogen in order to penetrate carbon. The reaction temperature, holding time and particle size are dependent on the raw material.
Gas phase reaction method:
Hydrocarbons containing hydrogen (benzene and methane) are mixed into the steam of titanium chloride. After induction heating (or other methods), the steam is sent to deposit titanium carbide on the substrate. The reaction precipitates titania carbide on substrate. The precipitation of titanium carbide differs depending on the conditions of the reaction, including the ratio of reaction gas to gas flow, the temperature of the gas and the rate of gas flow.
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