日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 82, No. 08 (2018),
pp. 297-306

Analyzing of Reaction Mechanisms of Cu-Al Intermetallic Compounds in Dipping Experiment of Cu Wire and Cu Plate into Al Melt by Cylindrical Reaction Model and Flat Plate Model —In Order to Analyze the Combustion Synthesis of Cu-Al Intermetallic Compounds—

Kaichi Hashi 1 and Atsushi Hibino 2

1 Department of Mechanical System Engineering, Graduate School of Engineering, Toyama Prefectural University
2 Department of Mechanical System Engineering, Inst. of Technology, Toyama Prefectural University

Abstract:

In our previous paper, dipping experiments of Cu wires and Cu plates into molten Al were investigated to analyze the combustion synthesis of Cu-Al intermetallic compounds. From the dipping experiments, it was found that Cu3Al compound layers were formed between the Cu base metal and the molten Al. The compound formation reactions were able to be almost simulated by calculating the cylindrical model and the flat plate reaction model. However, there are a few differences between Cu wire dipping experiment and Cu plate dipping experiment. Al concentration of Cu3Al compound phase formed in the Cu wire are higher than that of Cu plate. For the reaction parameters, diffusion coefficient of Al in Cu plate dipping experiment is also higher than that of Cu wire dipping experiment.

For the dipping experiment of Cu wire, the reaction parameters are,

logD'Al.w / [m2·s-1] = -3.90 × 103/T - 7.50
logkf.w / [mol·m-2·s-1] / = -6.98 × 103/T + 4.70

For the dipping experiment of Cu plate, the reaction parameters are,

logD'Al.p / [m2·s-1] = -2.59 × 103/T - 8.45
logkf.p / [mol·m-2·s-1] = -8.50 × 103/T + 6.00

From analyzing the cylindrical model and the flat plate reaction model, it is guessed the differences were caused by the contact area of Cu/Cu3Al/Al interface and Al concentration of Cu3Al phase formed in Cu wires and Cu plates.

[doi:10.2320/jinstmet.J2017056]


(Received 2017/11/29)

Keywords:

Cu-Al, intermetallic compound, reaction mechanism, combustion synthesis, dipping experiment, cylindrical reaction model, flat plate reaction model


PDF(Free)PDF (Free)     Table of ContentsTable of Contents

Please do not copy without permission.