Mechanical and electromechanical properties of monoclinic ZrO2 fiber/PZT composites

被引：0
|
作者：
Takahashi, Minoru [1 ]
Baba, Kazuyoshi [1 ]
Nishizato, Osamu [1 ]
Takamura, Akinobu [1 ]
Katsube, Masayoshi [1 ]
机构：
[1] Nagoya Inst of Technology, Tajimi-shi, Japan
来源：
Journal of the Ceramic Society of Japan. International ed. | 1994年 / 102卷 / 01期
关键词：
Bending strength - Casting - Crack propagation - Electric properties - Fibers - Fracture toughness - Mechanical properties - Microstructure - Permittivity - Sintering - Thermal expansion - Zirconia;
D O I：
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中图分类号：
学科分类号：
摘要：
Mechanical and electromechanical properties of mono-clinic ZrO2 fiber/PZT composites fabricated by slip casting and ordinary sintering were examined. Bending strength of the composites decreased by increasing the fiber content from 0 to 20vol%. However, the composite containing 5vol%ZrO2 fibers yielded a fracture toughness K1C of 1.4MPa &middot m 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 K1C&middot Addition of ZrO2 fibers reduced both permittivity and coupling factor K31 of the composites. At 5vol%ZrO2, the K31 value of the composite was 25% lower than that of PZT matrix.
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页码：65 / 70
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