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Growth kinetics of ?2 crystals on mercury-plated Ag3Sn

✍ Scribed by Okabe, T. ;Hines, A. L. ;Hochman, R. F. ;Sims, L. O.

Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
399 KB
Volume
9
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

Previous work has shown that needles of Ξ³~2~ crystals form when mercury is plated on the surface of an Ag~3~Sn specimen. In the present study, the growth kinetics of Ξ³~2~ needles were investigated from room temperature to 50Β°C for varying amounts of plated mercury. Straight‐line relationships between crystal length and the square root of the time of growth showed that the growth rate is diffusion controlled. The growth rate increased with temperature up to 40Β°C but decreased at higher temperatures. Further, as the temperature was increased, fewer Ξ³~2~ crystals formed and their growth length decreased. This demonstrates that a number of competing factors are involved in the growth process at high temperatures.

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