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- Title
Well-Dispersed Carbon Nanotubes for Greatly Enhanced Mechanical Properties of Alumina-Based Composites.
- Authors
Chen, Yangming; Feng, Yi; Wang, Yuqing; Mo, Fei; Qian, Gang; Yu, Dongbo; Liu, Wenhong; Zhang, Xuebin
- Abstract
Multi-wall carbon nanotubes (MWCNTs) reinforced AlO composites (MWCNTs/AlO) have been prepared by a hot-pressing method, and the mechanical properties of the composites are investigated. Compared with the pure alumina, when adding 1.5 wt.% MWCNTs into the AlO matrix, the composites have much higher flexure strength (403.6 MPa) and fracture toughness (4.21 MPa·m), which shows a simultaneous increase of 38% in flexure strength and 35% in fracture toughness. The microstructural observations of MWCNTs/AlO composites show that MWCNTs are homogeneously dispersed and embedded strongly in the alumina matrix due to the electrostatic interaction between MWCNTs and AlO, resulting in great improvement of flexure strength and fracture toughness. The reinforcement mechanism of the composites is mainly the pullout of MWCNTs from the matrix, MWCNTs bridging and crack deflection.
- Subjects
CARBON nanotubes; CERAMIC-matrix composites; FLEXURAL strength; MECHANICAL behavior of materials; MICROSTRUCTURE
- Publication
Refractories & Industrial Ceramics, 2017, Vol 58, Issue 2, p188
- ISSN
1083-4877
- Publication type
Article
- DOI
10.1007/s11148-017-0079-y