Toughening and reinforcing alumina matrix composite with single-wall carbon nanotubes

The authors report an efficient way of incorporating single-wall carbon nanotubes (SWNTs) into alumina matrix with strong interfaces by heterocoagulation. The fracture toughness of SWNTs/ Al 2 O 3 composite reaches 6.40 ± 0.3 MPa m 1 ∕ 2 , which is twice as high as that of unreinforced alumina. The...

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Bibliographic Details
Published in:Applied physics letters 2006-09, Vol.89 (12), p.121910-121910-3
Main Authors: Fan, Jin-Peng, Zhuang, Da-Ming, Zhao, Da-Qing, Zhang, Gong, Wu, Min-Sheng, Wei, Fei, Fan, Zhuang-Jun
Format: Article
Language:English
Subjects:
ALUMINIUM OXIDES
CARBON
CARBON FIBERS
CERAMICS
COMPOSITE MATERIALS
CRACKS
FRACTURE MECHANICS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
INTERFACES
MATERIALS SCIENCE
NANOTUBES
PRESSURE RANGE MEGA PA 01-10
REINFORCED MATERIALS
WALLS
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Summary:The authors report an efficient way of incorporating single-wall carbon nanotubes (SWNTs) into alumina matrix with strong interfaces by heterocoagulation. The fracture toughness of SWNTs/ Al 2 O 3 composite reaches 6.40 ± 0.3 MPa m 1 ∕ 2 , which is twice as high as that of unreinforced alumina. The flexure strength of the composite also increases by 20%. The main toughening mechanism is crack bridging of SWNTs, and SWNT pullout takes effect also.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2336623