Lateral Diffusion Spreading of Two Competitive Intermetallic Phases over Free Surface |
| Journal |
Defect and Diffusion Forum (Volume 277) |
| Volume |
Diffusion and Diffusional Phase Transformations in Alloys |
| Edited by |
D.Beke, A.Gusak, G.Murch, J.Philibert |
| Pages |
9-20 |
| DOI |
10.4028/www.scientific.net/DDF.277.9 |
| Online since |
April, 2008 |
| Authors |
Yu. Kaganovskii,
L.N. Paritskaya,
V.V. Bogdanov
|
| Keywords |
Cu-Sn Interdiffusion, Parabolic Kinetics, Surface Diffusion, Surface Diffusion Coefficient, Surface Phase Spreading |
| Abstract |
The kinetics of growth and lateral spreading of intermetallic layers during surface
interdiffusion in Cu – Sn system has been studied in a temperature range 160 – 200oC by the
methods of optical microscopy, SEM provided with X-ray microprobe, and AFM. Lateral phase
spreading over the surface is characterized by competition between two phases: Cu6Sn5 and Cu3Sn.
A steady state solution for concentration distribution on the surface of growing intermetallic
phases, as well as kinetic equations of lateral spreading of growing phase layers have been
obtained. By comparison of experimental data on intermetallic growth kinetics with the proposed
theory, the dynamic surface diffusion coefficients have been calculated. |
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