バルブ用セラミックスの機械的性質と微細組織(<小特集>セラミック材料小特集)

概要

論文の詳細を見る
In order to use ceramics as a material for slurry valves, which are exposed to a flow of slurry containing hard particles of coal or ash, the bending strength of alumina (Al_2O_3), silicon nitride(Si_3N_4), silicon carbide (SiC), and partially stabilized zirconia (PSZ) was examined under the practical condition (400℃, slurry dipped condition). Also high resolution transmission electron microscopy (HR-TEM) was employed to characterize these materials. From the direct observation of the microstructure of cracked surfaces, it was shown that fracture took place from the structual weakpoints, that is, pores, large crystal grains and the impurity phases. In the case of ceramics with uniformly small crystalline particles and very little pores, fracture seems to occur through the impurity phases.
社団法人日本材料学会の論文
1986-01-15