Gravity-induced sedimentation during melting and liquid phase sintering of Pb-Sn alloys
Document Type
Article
Publication Date
1-22-2003
Abstract
Gravity-induced phase separation during melting of Pb-Sn alloys results in a macroscopic concentration gradient that must be eliminated before phase equilibrium is established. When Pb-Sn alloys are heat treated in solid-plus-liquid regions (akin to liquid phase sintering), recession of the mushy (solid-plus-liquid) region accompanies elimination of the concentration gradient. Sedimentation apparently ceases as phase equilibrium is approached. Some solid-plus-liquid alloys do not sediment. These have a solid volume fraction sufficient to sterically hinder the gravity-induced phase separation. This critical volume fraction is about 0.50 for hypoeutectic (Pb-rich) alloys and about 0.75 for hypereutectic (Sn-rich) alloys. © 2002 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
Publication Title
Acta Materialia
Recommended Citation
Du, Y.,
Courtney, T.,
&
Lu, S.
(2003).
Gravity-induced sedimentation during melting and liquid phase sintering of Pb-Sn alloys.
Acta Materialia,
51(2), 445-456.
http://doi.org/10.1016/S1359-6454(02)00428-7
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7676