書誌事項
- タイトル別名
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- Evaluation of Mechanical Properties and Microstructures of Multi-Walled Carbon Nanotube/Alumina Composites Prepared by Pressureless Sintering
抄録
Alumina ceramics reinforced with multi-walled carbon nanotubes (MWCNTs) have been prepared by pressureless sintering. Resultant composites with the MWCNT contents up to 0.9 vol.% have shown relative density as high as 98%. In addition, with increasing the MWCNT contents up to 0.9 vol.%, bending strength and fracture toughness of the composites is found to be increase gradually, and the composite containing 0.9 vol.% MWCNTs have shown 18% and 32% simultaneous increases in bending strength (699.1 ± 46.1 MPa) and fracture toughness (5.33 ± 0.03 MPa·m1/2), respectively, compared with MWCNT-free alumina. Observations on the fracture surface and the tensile-loading experiments of MWCNTs using an in-situ SEM method with a nanomanipulator system demonstrate that the MWCNTs, rather than pulling out from the alumina matrix, tend to fail in so-called “clean break” manner. Theoretical calculations imply that tougher ceramics with MWCNT can be obtained by creating the appropriate interaction between the matrix and MWCNT: not too week but also not too strong to permit an adequate load transfer between the two parts and thus a consequent pulling out without breakage of MWCNT. For the design of tougher ceramics with MWCNTs, appropriate modification of fiber/matrix interface will be one of important factors.
収録刊行物
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- 日本機械学会論文集Ａ編
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日本機械学会論文集Ａ編 79 (802), 764-768, 2013
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204477272320
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- NII論文ID
- 130003374658
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- ISSN
- 18848338
- 03875008
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
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- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可