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Title: Dynamic evolution of liquid–liquid phase separation during continuous cooling

Solidification from a multiphase fluid involves many unknown quantities due to the difficulty of predicting the impact of fluid flow on chemical partitioning. Real-time x-ray radiography was used to observe liquid-liquid phase separation in Al90In10 prior to solidification. Quantitative image analysis was used to measure the motion and population characteristics of the dispersed indium-rich liquid phase during cooling. Here we determine that the droplet growth characteristics resemble well known steady-state coarsening laws with likely enhancement by concurrent growth due to supersaturation. Simplistic views of droplet motion are found to be insufficient until late in the reaction due to a hydrodynamic instability caused by the large density difference between the dispersed and matrix liquid phases.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
OSTI Identifier:
1238610
Report Number(s):
LA-UR--13-28612
Journal ID: ISSN 0254-0584; PII: S0254058414008499
Grant/Contract Number:
AC02-06CH11357; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Materials Chemistry and Physics
Additional Journal Information:
Journal Volume: 153; Journal ID: ISSN 0254-0584
Publisher:
Elsevier
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22), Division of Materials Sciences and Engineering
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE