Investigation on the Reinforcement of Multi-Walled Carbon Nanotubes on Alumina Matrix

Jing Sun; Lian Gao

doi:10.4028/www.scientific.net/AST.51.64

Paper Titles

Self-Assembled Low-Resistivity NiSi Nanowire Arrays on Epitaxial Si_0.7Ge_0.3 on (001)Si
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Preparation and Cathodoluminescence Properties of Ga-Doped ZnS Nanowalls
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Nanoparticles of La_(1-x)Sr_xMnO₃ (x = 0.33, 0.20) Assembled into Hollow Nanostructures for Solid Oxide Fuel Cells
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Preparation of SiC Nanofibers by Using the Polymer Blend Technique
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Investigation on the Reinforcement of Multi-Walled Carbon Nanotubes on Alumina Matrix
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Template Synthesis of Nanostructured Carbons
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Characterization of Fullerene / TriA-PI Composites
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Carbon-Based and Other Nanostructures Obtained via Cluster-Assembling: A View Combining Electron Spectroscopies and Nanospectroscopies
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Probing the Role of Nanoroughness in Contact Mechanics by Atomic Force Microscopy
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Investigation on the Reinforcement of Multi-Walled Carbon Nanotubes on Alumina Matrix

Abstract:

In this paper, a colloidal processing route was adopted to disperse multi-walled carbon nanotubes (MWNTs) into alumina powders homogenously. Alumina matrix composites containing 0.1 to 2 weight percent of MWNTs were successfully fabricated by pressureless sintering. Also, 1wt% MWNTs-alumina composites were prepared by hot pressing for comparison. It was found that when the sample was sintered at 1450oC, the addition of 1wt% carbon nanotubes led to 10% increase in bending strength compared with monolithic alumina. The reinforcement mechanism was discussed based on the microstructure investigation. The broken nanotubes and pullout of MWNTs at interfaces are efficient in transferring the load from the alumina matrix to the nanotubes, leading to the improvement of the mechanical properties.