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Criteria for Diffusion by a Site‐Interchange Mechanism
Author(s) -
Birnie Dunbar P.
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb09727.x
Subject(s) - diffusion , mechanism (biology) , silicon carbide , vacancy defect , chemical physics , materials science , lithium (medication) , silicon , semiconductor , lithium niobate , chemistry , thermodynamics , crystallography , optoelectronics , metallurgy , physics , medicine , quantum mechanics , endocrinology
Criteria are established for evaluating whether self‐diffusion in a material may be occurring by a site‐interchange diffusion mechanism. The criteria include comparisons between defect formation and migration energies for the site‐interchange model and a normal vacancy diffsion model. These criteria are applied to some material systems to illustrate their utility. A site‐interchange diffusion mechanism is probably occurring in lithium niobate, but this mechanism is not operative in silicon carbide or in some III‐V compound semiconductors.