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ElectroComponent Science and Technology
Volume 6 (1980), Issue 3-4, Pages 147-150

Gold-Aluminium Intermetallic Compound Formation

1Istituto di Fisica, Via Campi 213/A, Modena 41100, Italy
2Istituto di Mineralogia E Petrografia, P. Le S. Eufemia, 2, Modena 41100, Italy

Received 11 April 1979

Copyright © 1980 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


During investigations of failure mechanisms and failure avoidance we have studied the kinetics and the mechanisms responsible for the growth of the Au-Al compounds. Au4Al, Au5Al2, Au2Al, AuAl, AuAl2 have been observed and the growth kinetics of the Au2Al, AuAl, AuAl2 follow a (time)1/2 dependence. The activation energy for the growth of Au2Al is 1 eV and 1.2 eV was found for AuAl and AuAl2. The kind of compound formed depends on the samples preparation and the results indicate that the kinetics of the mixing is the main mechanism responsible for the sequence of formation of the various compounds.