ファイバー分散ZrO_2の耐熱衝撃性 : マトリックス中のY_2O_3の影響

概要

論文の詳細を見る
Influence of Y_2O_3 content on the thermal shock resistance of ZrO_2 Y_2O_3 ceramics including 12 vol% of ZrO2 Y_2O_3 fiber was investigated by varying the con tent of Y_2O_3 from 1.5 to 8.0 mol%. After specimens were sintered at 1300, 1400 and 1500℃ for 2h, bending strength, fracture toughness, thermal conductivity, and thermal expansion coefficient were Measured. Thermal shock resistance was characterized by strength degradation before/after thermal shock experiment (quenching temperature difference; ΔT= 600 K) , and it was increased as the Y_2O_3 content was decreased. It is considered that this is due to the decrease in thermal expansion coefficient caused by the increase in monoclinic phase in the matrix, and the in creasing of fracture toughness.
社団法人日本セラミックス協会の論文
1994-01-01