titanium diboride (TiB2)
The cermet product is more suitable for use in high temperature, high corrosive conditions.
The properties of titanium diboride both as a structural material and a functional material:
1. Structure materials. Due to its high strength, titanium boride can be used for tools, wire drawing films, sandblasting materials, and other hard tooling materials. It can also be added to composite materials.
2. Functional materials. It is very useful to use titanium boride in functional materials because its resistivity is similar to pure iron. Titanium boride’s electrical properties can be used to create flexible PTC material.
There are many methods to prepare titanium diboride. These include the carbothermal method of reduction, the self-propagating method at high temperature, mechanochemical method, vaporization method, and ball milling.
Reduce carbothermic toxicity using a reduction method
The quality of the titanium diboride powder synthesized depends on the powder purity. This is achieved by using titanium and boron oxids as raw materials. Carbon black is used as a reducing agent. This process is widely used in industrial production. The powder obtained from this process has large particles and is high in impurities.
Self-propagating heat synthesis (SHS).
In general, this method is to compress the raw material mixture that will be reacted and ignite one end of the resulting block. The reaction releases a huge amount of heat, which causes adjacent materials to react. Eventually, a combustion-wave spreading at speed v forms. As the combustion wave moves forward, the raw materials are transformed into a final product. Because of the self purifying effect, the high-temperature synthesis self-propagating process produces a high-purity product. This powder is easily sintered with low energy consumption. With the use of other technical means and special techniques, it is possible to prepare dense titanium diboride directly.
Methode de Reaction Mécanochimique (MR).
The powder reactant is pressed and shaved by the ball to create a powder. The ball milling medium generates chemical energy through the violent friction. Comparing the two first methods of preparing titanium dioxide, the mechanochemical reactions method has advantages such as low synthesis temperatures, a wide range of raw material sources, and low costs.
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