MEASUREMENT OF ATOMIC KINETICS OF SOLIDIFICATION USING PELTIER HEATING AND COOLING

Abstract

Periodic Peltier heating and cooling may be generated at a solid/ liquid interface by the passage of an alternating electric current. Melting and freezing will then occur at rates which will be influenced by the kinetic law of molecular attachment relating solidification velocity to interface temperature. The equation describing the interface attachment kinetics may be determined by measuring the response of a solid/liquid interface to square-wave Peltier heating and cooling. The mathematical methods required for extracting the kinetic equation by analysis of the waveform of interface motion show that this technique should give distinguishably different waveforms for linear, parabolic, and exponential kinetics. There are advantages of the method, but precautions must be taken to eliminate possible confusing effects.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 05, 1967
Accession Number
AD0664206

Entities

People

  • M. E. Glicksman
  • R. J. Schaefer

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Coefficients
  • Crystal Growth
  • Crystals
  • Electric Current
  • Energy Transfer
  • Freezing
  • Heat Energy
  • Heat Of Fusion
  • Heat Transfer
  • Heat Transmission
  • Integral Equations
  • Latent Heat
  • Materials
  • Square Waves
  • Temperature Gradients
  • Thermal Conductivity
  • Waveforms

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Materials Science and Engineering.
  • Thermal Physics or Thermal Science.