Removal and Separation of Particles by Crystallization

Abstract

Pushing and incorporation of foreign particles during solidification were studied. Trapping was favored by rapid freezing, a small amount of stirring, and the presence of gas bubbles at the interface, and by formation of an acute angle between the interface and the container. With faceted growth, trapping differed from grain to grain and was sometimes favored at a grain boundary. The temperature gradient had no effect on particle trapping. Particle mixtures were separated by slowly increasing the freezing rate. This is called particle chromatography. A theory was developed for nucleation of gas bubbles during crystallization.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1973
Accession Number
AD0753056

Entities

People

  • Vincent H. Kuo

Organizations

  • University of Southern California

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Chemical Synthesis
  • Chemistry
  • Crystallization
  • Diagrams
  • Grain Boundaries
  • Heat Energy
  • Heat Of Fusion
  • Heat Transfer
  • Latent Heat
  • Mixtures
  • Organic Compounds
  • Particles
  • Phase Diagrams
  • Temperature Gradients
  • Thermal Conductivity
  • Transition Temperature

Readers

  • Aerosol Science/Aerosol Physics
  • Powder metallurgy of Titanium alloys.