کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1450328 | 988730 | 2008 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Microstructural evolution during the dissolution of nickel in liquid aluminum under the influence of an electric field Microstructural evolution during the dissolution of nickel in liquid aluminum under the influence of an electric field](/preview/png/1450328.png)
The influence of a DC current on the microstructural evolution of phases resulting from the dissolution of solid Ni in pure and Ni-saturated liquid Al was investigated. Experiments were carried out with the dissolution flux and the electronic flow being co-linear and counter-linear. The change in microstructure in the presence of a current, and its dependence on current density, is consistent with an increased dissolution of the Ni in liquid Al. No dissolution of Ni in Ni-saturated liquid Al was observed in the absence of current, but is significant when a current is imposed. On the surface of the Ni, two intermetallics formed: Al3Ni2 and Al3Ni. The former grew parabolically during dissolution in the absence of a current, but remained constant when a current was imposed. The calculated effective diffusion coefficient decreased with dissolution time, indicating a reduction in dissolution rate with increasing concentration of dissolved Ni.
Journal: Acta Materialia - Volume 56, Issue 8, May 2008, Pages 1840–1848