TiO_2を添加したアルミナセラミックスの微構造と機械的性質に及ぼす生成物Al_2TiO_5の分解の影響

概要

論文の詳細を見る
Al_2TiO_5 decomposes into Al_2O_3 and Ti0_2 at 900 to 1300℃. The effect of Al_2TiO_5 decomposition on the microstructure and mechanical properties of Al_2O_3 TiO_2 ceramics was studied by X ray powder diffraction, scanlring electron microscopy, bending and tough ness tests. The alumina powder compacts containing O to 16 wt% TiO_2 were sintered at 1500℃ for 2h, and then annealed at 900 1350℃ in air. Thermal stress existed in sintered body due to the difference in thermal expansion coefficient between Al_2O_3 and Al_2TiO_5. The stress enhanced the decomposition rate of Al_2TiO_5, while it decreased with the decomposition of AI_2TiO_5. The bending strength of sintered alumina ceramics was increased by the decomposition of Al_2TiO_5, but the toughness almost unchanged.
社団法人日本セラミックス協会の論文
1994-03-01