Eur. Phys. J. D 4, 365-372 (1998)
https://doi.org/10.1007/s100530050220

Classical dynamical simulation of spontaneous alloying

¹ Department of Physics, Faculty of Science and Engineering, Ritsumeikan University, Noji-higashi 1-1-1, Kusatsu 525-8577, Japan
² Department of Electrical and Electronics Engineering, Faculty of Engineering, Kagoshima University, Kohrimoto 1-21-40, Kagoshima 890, Japan
³ Department of Physics, Faculty of Science and Engineering, Ritsumeikan University, Noji-higashi 1-1-1, Kusatsu 525-8577, Japan Department of Electrical and Electronics Engineering, Faculty of Engineering, Kagoshima University, Kohrimoto 1-21-40, Kagoshima 890, Japan Department of Physics, Faculty of Science and Engineering, Ritsumeikan University, Noji-higashi 1-1-1, Kusatsu 525-8577, Japan

Received: 2 March 1998
Revised: 21 May 1998
Accepted: 28 May 1998
Published online: 15 December 1998

Abstract

"Spontaneous alloying" observed by Yasuda, Mori et al. for metallic small clusters is simulated using classical Hamiltonian dynamics. Very rapid alloying occurs homogeneously and cooperatively starting from the solid phase of the cluster if the heat of solution is negative and the size of cluster is less than a critical size. Analysis of 2D models reveals that the alloying rate obeys an Arrhenius-type law, which predicts the alloying time much less than second at room temperature. Evidences manifesting that the spontaneous alloying proceeds in the solid phase without melting are also presented. The simulation reproduces the essential features of the experiments.