Effect of Sintering Schedule on the Microstructure of Carbon Nanotubes Reinforced Alumina Fabricated by SPS Method

Li Wei Huang; Zheng Yi Fu; Jin Yong Zhang; Wei Min Wang; Hao Wang; Yu Cheng Wang; Koichi Niihara; Soo Wohn Lee

doi:10.4028/www.scientific.net/AMR.66.288

Paper Titles

Preparation of ZrC Powder by Self-Propagating High-Temperature Synthesis
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Preparation of Mg-Cu Composite by Tape Casting and Hot-Pressing
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Numerical Simulation of Dominating Control Factors of Thermal Protection FGM’s Effective Thermal Conductivity
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Spark Plasma Sintering Process of Fe-6.5%Si Alloy from Fe and FeSi Powders
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Study on Electrical Properties of Carbon Fiber Reinforced Cement Paste with CCCW
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The Effect of Surface Hydroxyl Groups on the Properties of SR/Al₂O₃ Composites
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Synthesis of Co₂O₄ Microspheres by Hydrothermal-Precipitation for Electrochemical Supercapacitors
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Preparation and Characterization of Novel Functional Gradient Syntactic Foam
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Effect of Sintering Schedule on the Microstructure of Carbon Nanotubes Reinforced Alumina Fabricated by SPS Method
p.288

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Effect of Sintering Schedule on the Microstructure of Carbon Nanotubes Reinforced Alumina Fabricated by SPS Method

Abstract:

Carbon nanotubes reinforced alumina was fabricated by spark plasma sintering method. When adding 0.2wt% nanotubes, the fracture toughness of the composites prepared increases 19% compared with the pure alumina ceramics. The effect of sintering schedule on microstructure and mechanical properties is investigated systematically. Microstructure studies reveal that at high sintering temperature, the nanotubes tend to gather in the gaps surrounded by three or more grains in a flocculent state, which leads to poor mechanical properties. Raman spectrum indicates that long sintering duration may cause serious nanotubes destruction and lower the mechanical properties.