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Citation: WANG Yi, JIANG Wei, CHENG Zhi-Peng, ZHANG Xian-Feng, AN Chong-Wei, SONG Xiao-Lan, LI Feng-Sheng. Thermal Performance Investigation of Core-Shell Cu/Al Micron-Nano Composites with WO₃[J]. Acta Physico-Chimica Sinica, ;2007, 23(11): 1753-1759. doi: 10.3866/PKU.WHXB20071119 shu

Thermal Performance Investigation of Core-Shell Cu/Al Micron-Nano Composites with WO₃

1.
National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing 210094, P. R. China; College of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, P. R. China

Received Date: 18 March 2007
Available Online: 28 August 2007

A kind of core-shell Cu/Al powder has been prepared via a facile displacement method, in which the micron-sized Al cores were coated in Cu shells. SEM, EDS and XRD were employed to characterize the samples. The thermal performance of micron-sized Al particles and Cu/Al micron-nano composites with WO3 were investigated by differential scanning calorimetry (DSC) as a function of the equivalence ratio. Mechanisms of thermite reactions have been proposed. Results indicated that the reactivity of Cu/Al micron-nano composites with WO3 was significantly higher than that of micron-sized Al particles, but depending strongly on equivalence ratio. The optimum equivalence was reached when the composites were fuel slightly rich. The activation energy of Cu/Al-WO3 was decreased by 68.185 kJ·mol-1 compared with that of Al-WO3.
- Nano Cu; Al powders; WO3; Micron-nano composites; Thermite reaction; Kinetics
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Thermal Performance Investigation of Core-Shell Cu/Al Micron-Nano Composites with WO3

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通讯作者: 陈斌, bchen63@163.com

Thermal Performance Investigation of Core-Shell Cu/Al Micron-Nano Composites with WO₃