Thermal Gradient Migration of Brine Inclusions in Synthetic Alkali Halide Single Crystals

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An apparatus consisting of an optical microscope with a hot stage attachment capable of simultaneously non-uniformly heating and mechanically loading small single crystals of salt was used to measure the velocities of all-liquid inclusions in NaCl and KCl specimens under various conditions of temperature, temperature gradient, and uniaxial stress. The rate-controlling elementary step in the migration of the inclusions was found to be associated with interfacial processes, probably dissolution of the hot face. Dislocations are required for this step to take place. The small number of dislocation intersections with small inclusions in nearly perfect crystals causes substantial variations in the ... continued below

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46 p.

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Olander, D.R.; Machiels, A.J.; Balooch, M. & Yagnik, S. January 1, 1981.

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Description

An apparatus consisting of an optical microscope with a hot stage attachment capable of simultaneously non-uniformly heating and mechanically loading small single crystals of salt was used to measure the velocities of all-liquid inclusions in NaCl and KCl specimens under various conditions of temperature, temperature gradient, and uniaxial stress. The rate-controlling elementary step in the migration of the inclusions was found to be associated with interfacial processes, probably dissolution of the hot face. Dislocations are required for this step to take place. The small number of dislocation intersections with small inclusions in nearly perfect crystals causes substantial variations in the velocity, a sensitivity of the velocity to mechanical loading of the crystal, and a velocity which varies approximately as the square of the temperature gradient.

Physical Description

46 p.

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  • Journal Name: Journal of Applied Physics

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  • Report No.: LBL-12163
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 1057560
  • Archival Resource Key: ark:/67531/metadc844481

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1981

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  • May 19, 2016, 9:45 a.m.

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  • Oct. 2, 2017, 4:27 p.m.

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Olander, D.R.; Machiels, A.J.; Balooch, M. & Yagnik, S. Thermal Gradient Migration of Brine Inclusions in Synthetic Alkali Halide Single Crystals, article, January 1, 1981; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc844481/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.