Effects of Sintering Additive on Mechanical Properties of Alumina Matrix Composites Reinforced with Carbon Nanotubes
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- YAMAMOTO Go
- Institute of Fluid Science, Tohoku University Fracture and Reliability Research Institute, Tohoku University
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- OMORI Mamoru
- Fracture and Reliability Research Institute, Tohoku University
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- HASHIDA Toshiyuki
- Fracture and Reliability Research Institute, Tohoku University
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- KIMURA Hisamichi
- Institute for Materials Research, Tohoku University
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- TAKAGI Toshiyuki
- Institute of Fluid Science, Tohoku University
Abstract
Carbon nanotube is nature's smallest fiber and predicted to have a range of unusual mechanical and electrical properties. One possible route to harnessing these properties for applications would be to incorporate nanotubes in a composite material. Here, we report the mechanical properties of multi-walled carbon nanotube (MWCNT) reinforced alumina composites made with a pristine MWCNT and an acid-treated version that have nanoscale defects on their surfaces from an acid treatment. It was demonstrated that surface modification of the MWCNT is effective in improvement of bending strength and fracture toughness of the MWCNT-reinforced alumina composites. On the basis of the results, we also prepared three sets of the acid-treated MWCNT-reinforced alumina composites having different sintering additives, in order to investigate the effects of sintering additives on their microstructures and mechanical properties. Mechanical properties of the composites were dependent mostly on the type of sintering additives and amount of MWCNT. The 0.9 vol.% acid-treated MWCNT-reinforced alumina composites with MgO sintering additive gave the highest bending strength (689.6 ± 29.1 MPa) and fracture toughness (5.90 ± 0.27 MPa·m1/2), respectively.
Journal
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- Journal of Solid Mechanics and Materials Engineering
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Journal of Solid Mechanics and Materials Engineering 4 (3), 460-469, 2010
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390282680240478336
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- NII Article ID
- 130000255520
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- ISSN
- 18809871
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed