Calorimetric study on mechanically milled aluminum and multiwall carbon nanotube composites
Calorimetric study on mechanically milled aluminum and multiwall carbon nanotube composites
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DOI：
10.1016/j.matchar.2011.07.017
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发表时间：
2011-11
影响因子：
4.7
通讯作者：
N. Nayan;S. Murty;S. Sharma;K. S. Kumar;P. Sinha
中科院分区：
文献类型：
--
作者：
N. Nayan;S. Murty;S. Sharma;K. S. Kumar;P. Sinha
Pure aluminum reinforced with carbon nanotube (CNT) composites have been prepared by high energy attritor milling up to 48hrs. Differential Scanning Calorimetry (DSC) has been carried out to investigate apparent activation energy and order of the reaction between carbon nanotubes and aluminum by Kissinger equation and Crane equation under non-isothermal conditions. The DSC results clearly reveal that an exothermic reaction occurs before the melting of aluminum. The effect of milling time on the initiation of this exothermic reaction has been studied. The peak temperature of the reaction of carbon nanotubes and aluminum is found to depend on the heating rate during the continuous heating. Apparent activation energy was found to get doubled after milling for 36hrs compared to 24hrs milled samples. The mechanism of the reaction kinetics which depends on reaction order is instantaneous nucleation and one dimensional growth for both samples. Formation of Al4C3was confirmed by X-ray diffraction (XRD) of as-milled powders and after performing DSC of the milled powders.
