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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 and nitric and hydrofluoric acids.
TiC has a metallic luster and is gray with an iron grey color. It is of the NaCl simple cubic type. 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, and a hardness that is second only to diamond. They also exhibit good thermal conductivity, electrical conductivity, as well as superconductivity at low temperatures. TiC can be used in many products, including cermets (heat-resistant alloys), cemented carbides (anti-wear materials), high-temperature radiation materials, and high-temperature vacuum devices.
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 pressed in 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. Or, using carbon black and sponge titanium as raw materials. Carbon black (or titanium alloy or titanium waste recovered in carbide solid solution), sponge Titanium and titanium alloy are combined in full proportions and heated at 15001700degC with a high-purity hydrogen stream. Titanium carbide.
Direct carbonization of Titanium Metal:
The carbon is infiltrated by a stream high-purity hydrogen heated to 1500-17degC. 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. Different reaction conditions (such as reaction temperature, gas concentration ratio and gas flow rate) and different precipitation forms of titanium carbide are observed.
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