ホウ化チタンの高温酸化挙動

概要

論文の詳細を見る
Oxidation behavior of titanium boride (TiB_2) powder was investigated by thermal analyses (DTA and TG) and X-ray diffraction. From the DTA and TG analyses, a broad exothermic peak with a continuous weight gain was observed between 450 and 750℃. The exothermic peak was bimodal with a minimum around 550℃. High-temperature X-ray diffraction spectra taken around this temperature were featureless. These observations suggest that a high viscosity liquid-phase of B_2O_3 forms as a thick surface coating which then prevents further oxidation of the underlying material. The X-ray diffraction analyses revealed that the reaction products were TiO_2 (anatase) at lower temperatures and TiO_2 (rutile) at higher temperatures. TiBO_3 was also identified in the material after heating to 1000℃.
社団法人日本セラミックス協会の論文
1996-08-01