高純度マグネシア焼結体の機械的性質に及ぼす粒子径の影響

概要

論文の詳細を見る
High-purity polycrystalline magnesia with different microstructures were prepared, and the effects of grain size on their bending strength and thermal shock damage resistance were investigated. The bending strength (σ_B) increased with decreasing grain size (D : μm) , and expressed by following equation.σ_B = 403 D^<-0.26> (MPa). On the other hand, the thermal shock damage resistance increased linearly with increasing grain size, which was explained by the damage resistance parameter R''' = E/σ_Τ^2r(1-v), where E is Young's modulus, v is Poisson's ratio and (σ_Τis tensile strength. E and v are unchanged and (σ_Τ×0. 6) decreased with increasing grain size, so R''' increased with increasing grain size. Consequently, thermal shock damage resistance increased with increasing grain size. Magnesia, Mechanical properties. Strength, Thermal shock resistance,
社団法人日本セラミックス協会の論文
1990-04-01