Abstract
An experimental study on the influence of a finite volume fraction of solid on Ostwald ripening of Pb-Sn dispersions is presented. Dispersions of lead particles in a near-eutectic Pb-Sn liquid were stabilized against gravitationally induced sedimentation by the use of Lorentz forces. The Lorentz forces were induced by an electrical current within the samples and a magnetic field perpendicular to it. Dispersions from 0.3 to 0.71 vol fraction solid Pb could thus be kept free of any large-scale sedimentation for times of minutes to 15 hours. The results show that there is a definitive effect of the volume fraction on the rate of coarsening and that the experimentally measured kinetics are in close agreement with theoretical predictions. However, it is also clear that Lorentz forces accelerate the coarsening process whenever a solid skeleton of the dispersoids is present. It is unclear if this acceleration is also present in the experiments with a low volume fraction of solid.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2470-2478 |
| Number of pages | 9 |
| Journal | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science |
| Volume | 27 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1996 |
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys