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Influence of Carbon Nanotubes on Oxidation Resistance of Bulk Composites of Mesocarbon Microbeads and Carbon Nanotubes |
Zhi WANG( ),Hengbing FAN,Wenbin MA,Yanying XU,Xu ZHANG,Jian CHEN,Xu WANG |
Shenyang Aerospace University, Shenyang 110136 |
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Cite this article:
Zhi WANG,Hengbing FAN,Wenbin MA,Yanying XU,Xu ZHANG,Jian CHEN,Xu WANG. Influence of Carbon Nanotubes on Oxidation Resistance of Bulk Composites of Mesocarbon Microbeads and Carbon Nanotubes. Chinese Journal of Materials Research, 2014, 28(11): 849-852.
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Abstract Bulk composite of mesocarbon microbeads and carbon nanotubes (MCMB/CNTs) was prepared by in-situ thermal polymerization, compression molding and high-temperature sintering. The oxidation resistance of MCMB/CNTs was studied using TG, and isothermal oxidation method. It was found that the oxidation resistance of the composites was enhanced by adding proper amount of CNTs in the matrix. With the increasing amount of CNTs, the interplanar spacing of microcrystall on the carbonized composites decreased and the oxidation resistance became better. An addition of 5% CNTs can induce about 40℃ increase in the initial mass loss temperature of the composite, and the mass loss of the composite was only 8.55% after isothermal oxidation in air for 10 h. But with addition of excessive CNTs, the particle size distribution of the microbeads was broadened and the degree of sphericity of the composite became poor, which led the composite with higher porosity and lower oxidation resistance.
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Received: 25 April 2014
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Fund: *Supported by Shenyang Science and Technology Program No. F12-277-1-33 and Program for Liaoning Excellent Talents in University No.LJQ2012014 |
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