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|Section2= |Section3= |Section7= }} Titanium diboride (TiB2) is an extremely hard ceramic which has excellent heat conductivity, oxidation stability and resistance to mechanical erosion. TiB2 is also a reasonable electrical conductor,〔J. Schmidt et al. "Preparation of titanium diboride TiB2 by spark plasma sintering at slow heating rate" Sci. Technol. Adv. Mater. 8 (2007) 376 (free download )〕 so it can be used as a cathode material in aluminium smelting and can be shaped by electrical discharge machining. ==Physical properties== TiB2 is very similar to titanium carbide, an important base material for cermets, and many of its properties (e.g. hardness, thermal conductivity, electrical conductivity and oxidation resistance) are superior to those of TiC:〔B. Basu et al. "Processing and properties of monolithic TiB2 based materials" (International Materials Reviews 51 (2006) 352 )〕 *Exceptional hardness (25–35 GPa Vickers at room temperature, more than three times harder than fully hardened structural steel), which is retained up to high temperature. *High melting point (3225 °C), *High thermal conductivity (60-120 W/(m K)), *High electrical conductivity (~105 S/cm) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「titanium diboride」の詳細全文を読む スポンサード リンク
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