正方晶ジルコニアの破壊挙動について

概要

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In of ceramics like zirconia, in which nonlinear type fracture is brought about by stress induced transformation, the mechanical properties are affected by the process zone around the stress field in front of crack. Recently, some reports on this point studied by XRD analysis and Raman technique have been published. This paper discusses the relationships between some mechanical properties and fracture behavior in Y-TZP. Test specimens of Y-TZP were prepared by sintering powder produced by the solution technique, and their mechanical properties were measured, and stress induced transformation on the fracture surface was analyzed by Raman spectroscopy. The monoclinic phase ratio on the fracture surface was correlated with bending strength but not with critical stress intensity factor. A distinct difference was observed in the morphology of fracture surface between specimens with strengths higher and lower than 80 kg/ mm^2.
社団法人日本セラミックス協会の論文
1988-03-01