Tag: TiC

Titanium carbide Overview Titanium carbide has the chemical formula TiC and a molecular weight of 59.89. Gray metallic lattice solid with a face-centered cubic structure. Melting point: 3140+-90, boiling point: 4820, relative densities 4.93. Hardness is greater that 9. Water insoluble, but soluble with nitric and aqua regia. It is stable with air below 800 and eroded in air above 2000. It can react with O2 pure at 1150C.
Titanium carbide ceramics is a typical transition metal carbide. TiC’s unique properties are due to its bonding, which is composed of ionic covalent and metallic bonds. TiC has many unique properties due to its crystal structure. These include high hardness, high melt point, wear resistance, and electrical conductivity.
Preparation of Titanium Carbide
Method: The mixtures of titanium and carbon are obtained by hydrogen-reduction TiO2 in high temperature or by combining TiO2 with carbon powder in blocks. They are then heated in an electric oven to 2300-2700 and carbonized under H2 atmosphere. The hard, crystalline powder is produced by reacting titanium dioxide with carbon black above 1800degC. Cobalt and nickel are used to compact it for heat-resistant parts and cutting tools. Cutting tools are more brittle, and it’s lighter. Sintered carbide is less likely to produce grooves when combined with the tungsten carbide in tool materials. Property of titanium carbide
Theoretically TiC contains 20.05 percent carbon. It is a metallic light gray. It is stable chemically and nearly inert towards hydrochloric, sulfuric, and nitric acids. TiC dissolves readily in oxidizing chemical solutions, like aqua regia, nitric and hydrofluoric acids, or hydrofluoric acetic acid. It dissolves also in alkaline oxyde melt. When heated, nitrogen is formed above -1500degC in a nitrogenous air. TiC can be attacked by chlorine and will oxidize at high temperatures.
The elastic modulus for TiC is 309 706 MPa. The material sintered from 2600 to 3000 has a fracture modulus between 499.8 and 843.2MPa at room temperatures. The thermal modulus is 107.78 – 116.96mpa for 982 and 54.4-63.92mpa for 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 with TiN and other raw materials to make various multiphase ceramics. They have excellent chemical stability. This makes them the best choice for cutting tool, wear-resistant components. Titanium carbide ceramics can be used for cutting high-speed regulating wheels, carbon steel and wire because they are resistant to oxidation and do not cause crescent wear. The use of multiphase ceramics containing titanium carbide has been widespread.
2. Titan carbide, as a surface coat, is extremely wear resistant. By a chemical or physical method, diamond surfaces are coated with carbides that can form metals. At high temperatures, these metals and alloys react with diamond surfaces carbon atoms to produce stable metal carbides. These carbides are not only able to bond with diamonds, but they can also infiltrate matrix metals, enhancing the adhesion between matrix metal and diamond. Tool life can increase by up to three times with titanium carbide film.
3. The research on nuclear fusion reactors has shown that titanium carbide and composite (TiN+TiC) coating materials, after chemical heat treatments, create a tritium-resistant layer of permeability on the surface titanium carbide. This layer can resist hydrogen and ion irradiation, as well as withstand large temperature gradients and thermal cycles.
4. The ceramics made of titanium carbide are good for optical purposes.
Titanium carbide Supplier
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Titanium Carbide: An Introduction The chemical formula of Titan carbide TiC is a gray, metal-like, solid with a face centered cubic lattice. Its molecular weight (59.89) is also 59.89. The melting temperature of titanium carbide ranges from 3140+90degC to 4820degC. Its relative density is 4,93 and its hardness is higher than 9.
Titanium carbide, while insoluble in water is soluble with nitric acids and aqua regia. It is stable when the temperature is below 800. However, when the temperature is above 2000 it will be corroded.
Carbonized TiO2 and TiO2 powders are heated in electric furnaces to 2300-2700degC.
Titanium carbide, which can be used in the manufacture of hard alloys as well as for arc lamp electrodes and abrasives, can also serve a variety of purposes.
Titan carbide can be prepared in several different ways
Reduce carbothermic toxicity using a reduction method
Use carbon black to reduce the TiO2 – the temperature range for this reaction is between 1700-2100. The chemical reaction formula: Direct Carbonization
Ti powder and carbon dust react to form TiC. The chemical reaction formula: Ti(s),+C(s),=TiC. The application of this method will be limited because it’s difficult to make sub-micron Ti powder. The reaction above takes between 5 and 20 hrs to complete. The reactants agglomerate and require additional grinding processes to achieve fine particles. Granular TiC powder. After ball milling, it is important to chemically purify the fine Powder to get a purer product.
Chemical vapor deposition
The synthesis method uses the reaction between TiCl4, and H2 and C. TiC The monofilament is soaked with crystals. The TiC produced by this method is subject to strict limitations on output, and in some cases even quality. It is important to be cautious when synthesizing TiCl4 because the HCl it contains can be very corrosive.
Microwave method
Use microwave energy to heat nano-TiO2 and carbon as raw materials. The dielectric loss in the material is used to convert microwave energy to heat energy.
Blast impact method
Preparing the precursor requires mixing the titanium dioxide powder with the carbon powder in a specific proportion. The powder density is set at 1.5g/cm3, the outer cylinder is made of metal, and the laboratory placed inside. It is then placed in an airtight container made by yourself for the experiment. The detonation powder will be collected after the explosion. After sieving the black powder, impurities like iron filings and large particles are removed. The black powder is soaked in Aqua Regia for 24hrs, then calcined 400degC at 400minutes to produce a silver-gray color.
High-temperature self-propagating synthesis
(SHS) SHS is derived by an exothermic process. When heated at the right temperature, fine-grained Ti Powder has a high degree of reactivity. The combustion wave produced after ignition will pass through Ti and the C reactants, and the reaction heat generated by Ti and the C will generate TiC. SHS has a reaction time of less than one second. The synthesis requires fine, high-purity Ti powder for the raw material and output is limited.
Reaction ball grinding technique
The reactive ball milling technique is a method that utilizes the chemical reaction of metal or alloy powder with other elements or compounds during the ball milling to prepare required materials. Reactive ball milling is used primarily to prepare nanomaterials using a high energy ball mill. The reaction ball grinding mechanism can be divided in two categories: the first is the mechanically induced high-temperature self-propagating synthesis reaction (SHS), while the second is the reaction ballmilling with no obvious exotherm and a slow reaction process.
Uses of titanium carbide
1. Use as an additive for metal bismuth and zinc melting crucibles and to prepare HDD large capacity memory devices and wear-resistant semiconductor films.
2. This is a component of cemented carburide used as a steelmaking deoxidizer.
3. As cermet it is known for its high hardness, corrosion-resistance, and thermal stability.
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