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Proceedings Paper

Microstructure and properties of MoSi2 intermetallic reinforced and toughened by carbon nanotube
Author(s): Yingjie Qiao; Xiaohong Zhang; Changqing Hong; Shaungquan Fang
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Paper Abstract

In this work, dense MoSi2 reinforced by single-wall carbon nanotubes (SWNTs) was firstly prepared by hot pressure sintering. The effect of SWNTs contents and sintered temperature on the mechanical properties of MoSi2-CNTs composite was studied. The microstructure, phase constitution and interfacial bonding were investigated Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and X-ray diffraction (XRD) pattern. The experimental results show that the fracture toughness of SWNTs/MoSi2 composite reaches 4.0±0.5 MPa.m1/2, which is about twice as high as that of unreinforced MoSi2. The flexure strength of the composite also increases by 75%. The reinforcement mechanism was discussed based on the microstructure investigation. The broken nanotubes and pullout of SWNTs at interfaces are efficient in transferring the load from the MoSi2 matrix to the nanotubes, leading to the improvement of the mechanical properties.

Paper Details

Date Published: 1 November 2007
PDF: 6 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 642367 (1 November 2007); doi: 10.1117/12.780374
Show Author Affiliations
Yingjie Qiao, Harbin Engineering Univ. (China)
Xiaohong Zhang, Harbin Engineering Univ. (China)
Changqing Hong, Harbin Institute of Technology (China)
Shaungquan Fang, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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