Precipitation induced by diffusivity anisotropy in Sn grains under electron current stressing
Journal
Journal of Alloys and Compounds
Journal Volume
555
Pages
237-240
Date Issued
2013
Author(s)
Abstract
Nickel diffuses five orders of magnitude faster along the c-axis of white Sn than along the a-axis. Experimental evidence is presented to show that, when Ni atoms diffuse from a Sn grain with its c-axis aligned with the Ni flux direction, across the grain boundary, and then into a neighboring Sn grain with its a-axis aligned with the Ni flux direction, Ni3Sn4 will preferentially precipitates at the Sn grain boundary. This is a direct proof that precipitation can be caused by the diffusivity anisotropy of a diffusion medium. © 2012 Elsevier B.V. All rights reserved.
Type
journal article