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What is titanium boreide?
Titanium boride is the most stable of all the compounds containing boron or titanium. It has a C32-structure and is combined as valence bonds. It is a hexagonal metalloid. The crystal structure is composed of a and C. a is 0.3028nm. In the crystal, the boron and titanium atoms alternately form a network structure in which the B and 3 other B are covalently-bonded and an extra electron forms a strong p bond. The layered graphite structure between boron and Ti outer layers determines TiB2’s good conductivity, metallic luster, and hardness.
Castables and the influence of titanium boride addition
The carbon in the injectable material can improve the corrosion resistance of the materials, reduce structural spalling, and increase thermal shock stability. Castables will suffer from carbon oxidation. TiB2 is widely used in ceramics and corundum materials with good results. However, it has not been studied as much in castables. The effect of TiB2 additive on the properties iron troughs castables was studied for this reason.
ASC iron-ditch castings were prepared to increase the oxidation resistance using brown corundum particles fused with SiC powder and particles, white corundum dust, Secar71, silicon, spherical powder + silicon, as main raw materials. The white powder of corundum was substituted with titanium boride, in different mass fractions, of 0.5%, 1%, 1.5%, and 2.0%, and its influence on the castable properties was investigated. The results show with an increase in the amount of TiB2, the linear change after 3 h at 1000 and 150 first decreases then increases. Bulk density first increases then decreases. Appearance porosity decreases then increases. The flexural and oxidation resistance increase and decrease in order. Addition of TiB2 at 1% (w) can give the highest high-temperature flexural resistance. Addition of 1% (w), TiB2, can give a sample a more comprehensive index.
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