Well-Dispersed Carbon Nanotubes for Greatly Enhanced Mechanical Properties of Alumina-Based Composites


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Multi-wall carbon nanotubes (MWCNTs) reinforced Al2O3 composites (MWCNTs/Al2O3) 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 Al2O3 matrix, the composites have much higher flexure strength (403.6 MPa) and fracture toughness (4.21 MPa·m1/2), which shows a simultaneous increase of 38% in flexure strength and 35% in fracture toughness. The microstructural observations of MWCNTs/Al2O3 composites show that MWCNTs are homogeneously dispersed and embedded strongly in the alumina matrix due to the electrostatic interaction between MWCNTs and Al2O3, 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.

作者简介

Yangming Chen

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Yi Feng

School of Materials Science and Engineering, Hefei University of Technology

编辑信件的主要联系方式.
Email: fyhfut@163.com
中国, Hefei, Anhui

Yuqing Wang

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Fei Mo

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Gang Qian

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Dongbo Yu

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Wenhong Liu

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

Xuebin Zhang

School of Materials Science and Engineering, Hefei University of Technology

Email: fyhfut@163.com
中国, Hefei, Anhui

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