Toughening Mechanism for Ceramics by a Ductile Metallic Phase
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概要
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The basic objective of this study is to establish the material design concepts for the coexistence of good high-temperature mechanical properties and super heat resistance in the systems of ceramic/metal and ceramic/ceramic functionally gradient materials (FGMs). Flexural and fracture toughness tests were conducted on gas-pressure combustion-sintered Cr_3C_2 ceramic and its composites with Ni and TiC (Cr_3C_2/Ni, Cr_3C_2/TiC) in a vacuum environment up to 1200℃ using a newly developed materials testing system. Fracture characteristics were investigated on the basis of fracture mechanics and fractography. The toughness of Cr_3C_2 can be improved by the addition of metallic particles. It is found that the principal mechanism of toughness improvement in these composites (ductile-phase reinforced ceramic matrix composites) is attributable to crack-tip plastic blunting by a ductile metallic phase.
- 一般社団法人日本機械学会の論文
- 1995-04-15
著者
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Maruyama Syuji
University Of Tsukuba Graduate Student
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Hirano K
Aist Miti Ibaraki Jpn
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Hirano Kazumi
Mechanical Engineering Laboratory
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WATANABE Osamu
Institute of Engineering Mechanics, University of Tsukuba
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Watanabe Osamu
Institute Of Engineering Mechanics And Systems University Of Tsukuba
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Watanabe Osamu
Institute Of Engineering Mechanics University Of Tsukuba
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