Structure, Growth, and Properties of Twist and Tilt Grain Boundaries in Bicrystals of NaCl

Autor:	N. Fuschillo, A. D. McMaster, M. L. Gimpl
Rok vydání:	1966
Předmět:	Materials science Misorientation General Physics and Astronomy Polishing Crystal growth Condensed Matter::Materials Science Crystallography Tilt (optics) Condensed Matter::Superconductivity Substructure Grain boundary Composite material Diffusion (business) Grain boundary strengthening
Zdroj:	Journal of Applied Physics. 37:2044-2051
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1708668
Popis:	Grain boundaries having from 2° to 45° mismatch across the interface were grown for pure tilt and pure twist misorientation in NaCl by the Czochralski technique. The method of crystal growth and the techniques required for good control of the misorientation and the planarity of the grain boundary are described. The substructure of twist and tilt NaCl bicrystals was examined using both optical and electron‐microscopic techniques. The tilt grain boundaries were found to be strong mechanically and not easily cleaved apart. The twist grain boundaries were very weak mechanically, especially at mismatch angles greater than 20°, and exhibited anomalously rapid diffusion or capillary flow effects along the grain boundary.Grain boundaries in the bicrystals were examined by: (1) pulling the crystals apart at the grain boundary and (2) by polishing away one side of the bicrystal to within 0.5 mm of the grain boundary. (The grain boundary surface could then be examined by focusing through the layer of NaCl.) Both of ...
Databáze:	OpenAIRE
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