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What is titanium boreide?
The compound TiB2 is the most stable of all boron-titanium compounds. 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. The crystal structure is a network of covalently-bonded boron and titanium atoms. An extra electron creates a large 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 material’s corrosion resistance and thermal shock stabilization, as well as reduce structural spalling. 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 trough casters was studied for this reason.
ASC iron-ditch castings were prepared to increase the oxidation resistance using brown corundum powder fused with SiC particles or fine powder. Other raw materials used included a-Al2O3 and Secar71 powders, silicon, sphere pitch, and silicon powder. The white powder of corundum was substituted with titanium boride, in different mass fractions, of 0, 0.5%, 1%, 1.5%, and 2.0%, and its influence on the properties of castable was investigated. The results show with an increase in the amount of TiB2, the linear change after 3 hours at 1000 or 1500 first decreases then increases. Bulk density increases then decreases. Appearance porosity increases then decreases. 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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