Titanium carbide: an overview
Titanium carbide. Chemical formula TiC. Molecular weight: 59.89. Gray metal lattice solids with a face-centered cubic structure. Melting point 31140+90, boiling temperature 4820, relative densities 4.93. Hardness is greater that 9. Water insoluble, but soluble with nitric and aqua regia. It is stable at 800 ppm and erodes at 2000 ppm. It reacts with pure O2 when heated to 1150C.
Titanium carbide, a metallic luster consisting of an iron-gray crystal with many similar metal characteristics, such as a high melting point, boiling temperature, hardness and thermal conductivity. Electrical conductivity and thermal conductivity are also excellent, while superconductivity can be seen at very low temperatures. This substance can be used to make cermets and heat-resistant metal alloys. It is also used for anti-wear, high-temperature materials, radiation material, and high-temperature vacuum equipment.
Ceramic material based on titanium carbide
The titanium carbide ceramics, as a typical transitional metal carbide and brittle in nature, can’t be used as engineering components. Composite materials are therefore used more as a layer on the materials that have already been used.
Titanium carbide is a ceramic that belongs to metal or alloy.
Ceramics made from titanium carbide are typical of transition metal carbides. TiC’s unique properties are due to its bonding, which is a combination of ionic covalent and metal bonds in the exact same crystal structure. TiC has many unique properties that are determined by its crystal structure, including high hardness, melting point, wear resistant and electrical conductivity.
Property of titanium carbide
Theoretically TiC contains 20.05 percent carbon, and it is a metallic gray. It is chemically resistant and inert towards hydrochloric, sulfuric, and nitric acids. TiC is easily soluble in oxidizing chemicals such as hydrofluoric or nitric acids. It is also readily soluble in melts of alkaline oxydes. In a nitrogenous environment, nitrogen is formed above -1500degC. TiC corrodes by chlorine at high temperature and oxidizes in air.
The elastic modulus for TiC is 309 706 MPa. The material sintered from 2600 to 3000 has a fracture modulus between 499.8 and 843.2 MPa. The thermal modulus of fracture ranges from 107.78mph to 116.96mpa in 982, to 54.4mpa to 63.9mpa in 2200. The melting point of TiC is 3160 degrees C. At room temperature, the resistivity is 180 to 250 It is a good conductor for high temperatures. The thermal coefficient of expansion between 593degC and room temperature is 4.12×10-6/degF. Thermal conductivity is 0.04 CAL/cmS/degC.
Titan carbide ceramics
1. Multiphase materials
Titanium carbide is a super hard material. It can be produced from raw materials such as TiN and WC. Al2O3 or other materials are also used to make TiC. This material has a high melting temperature, high hardness with excellent chemical stability. It’s the best choice for wear-resistant tools. Due to its high oxidation resistant and lack of crescent wear, titanium carbide is commonly used for cutting carbon steel and high-speed conductor wheel. The use of multiphase ceramic cutting tool containing titanium carbide is widespread.
2. Coating material
As a surface coat, titanium carbide has a high wear resistance. The surface of diamonds can be coated with some strong carbides by using chemical or physical methods. These metals and alloys react at high temperatures with the carbon on diamond surfaces to form stable metals carbides. These carbides are not only able to bond with diamonds but can also permeate matrix metals. The tool’s life can be extended by up to three times with titanium carbide film.
3. Research on the nuclear fusion power reactor.
After chemical heat treatments, titanium carbide coating and (TiN+TiC), composite coating material produce tritium-resistant layer on the surface.
The ceramics made from titanium carbide are good for optical purposes.
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