Mechanical Property and Fracture Behavior of BaTiO3-Based Nanocomposites (高次制御材料-1-<特集>)
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概要
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Dense and fine grained BaTiO<SUB>3</SUB>-based composites with the nano-sized SiC particulate were successfully fabricated by hot-pressing method. Mechanical properties and fracture behavior were investigated. High resolution TEM observation revealed that there were no conspicuous reaction phases in the interface between BaTiO<SUB>3</SUB> and SiC. The crystal structure was changed from ferroelectric tetragonal to paraelectric cubic phase with increasing SiC, and finally was pseudo-cubic for BaTiO<SUB>3</SUB> with more than 3vol% SiC. Mechanical properties such as fracture strength, fracture toughness, Youngs modulus and so on were markedly improved by the incorporation of nano-sized SiC particulates. The improvement of mechanical properties, particularly, microhardness and Youngs modulus might be caused by the crystal structural change as well as SiC addition. Fracture behavior and subcritical crack growth (SCG) phenomenon were also investigated using the indentation induced flaw method (IIF).
- 社団法人 粉体粉末冶金協会の論文
著者
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Sekino Tohru
The Inst. Of Multidisciplinary Res. For Advanced Materials Tohoku Univ.
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Niihara Koichi
The Institute Of Scientific And Industrial Research Osaka University
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NAKAHIRA Atsushi
The Institute of Scientific and Industrial Research, Osaka University
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Hae Jin
The Institute of Scientific and Industrial Research, Osaka University
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Hwang Hae
The Institute of Scientific and Industrial Research, Osaka University
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