窒化ケイ素セラミックスの粒界ガラス相の定量

概要

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The amount of intergranular glassy phase in sintered silicon nitride (Si_3N_4) was estimated by three methods, (1) calculation, (2) image analysis, and (3) X-ray diffraction (XRD) analysis. Four specimens with up to 15 wt% additives were prepared. The amounts of glassy phase in these specimens were estimated by the three methods and compared with the mechanical properties. The XRD analysis was thought to be most reliable, considering the objectivity of the method. Highly pure and homogeneous β-Si_3N_4 was required as a standard material for increasing the accuracy. The result of cross section image analysis was strongly influenced by the definition of grain boundaries. High temperature strength of sintered specimens decreased depending on the glassy phase content.
社団法人日本セラミックス協会の論文
1993-04-01