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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 3    September 1999

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Reaction thermodynamics and kinetics on in-situ Al2O3/Cu composites
Li Guobin(李国彬)1  Wu Jianjun(武建军)1   Guo Quanmei(郭全梅)2  Jiang Yanfei(姜延飞)1   Shen Yutian(申玉田)1 

1. Department of Materials Science and Engineering,Hebei University of Technology, Tianjin 300130, P.R.China;
2. Materials School, Harbin Institute of Technology, Harbin 150006, P.R.China

Abstract:The preferred internal oxidation of aluminum in Cu-Al alloy was used to obtain in-situ Al2O3/Cu composites. The reinforcement particles were mainly γ-Al2O3, some θ-Al2O3 and a little α-Al2O3. Thermodynamics analyses show that the chemical reactions are 3Cu2O+2Al=6Cu+Al2O3 or 3CuO+2Al=3Cu+Al2O3. A related equilibrium diagram was drawn. The experiments and investigation show that the formation rate of Al2O3 was controlled by the diffusion of oxygen in matrix.

 

Key words: Al2O3/Cu composites; internal oxidation; thermodynamics; kinetics

ISSN 1672-7029
CN 43-1423/U

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