単斜晶ZrO_2繊維/PZTコンポジットの機械的及び電気機械的性質

概要

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Mechanical and electromechanical properties of Monoclinic ZrO_2 fiber/PZT composites fabricated by slip casting and ordinary sintering were examined. Bending strength of the composites decreased by in creasing the fiber content from O to 20 vol%. However, the composite containing 5 vol% ZrO_2 fibers yielded a fracture toughness K_<IC> of 1.4 MP_・ma_<1/2>, 75% higher than that of PZT matrix. The measurement of thermal expansion and observation of Microstructure suggest that microcracking, crack bowing and crack deflection contribute to the increase in K_<IC>. Addition of ZrO_2 fibers reduced both permittivity and coupling factor K_<31> of the composites. At 5 vol% ZrO_2, the K_<31> value of the composite was 25% lower than that of PZT Matrix.
社団法人日本セラミックス協会の論文
1994-01-01