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Energies and Grooving Kinetics of [001] Tilt Boundaries in Nickel Oxide
Author(s) -
READEY D. W.,
JECH R. E.
Publication year - 1968
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.1151-2916.1968.tb11873.x
Subject(s) - grain boundary , tilt (camera) , materials science , nickel , dihedral angle , grain boundary diffusion coefficient , diffusion , oxide , surface energy , kinetics , volume (thermodynamics) , thermodynamics , condensed matter physics , metallurgy , geometry , chemistry , composite material , microstructure , physics , classical mechanics , hydrogen bond , mathematics , organic chemistry , molecule
Relative energies of symmetrical [001] tilt boundaries in nickel oxide bicrystals were determined from the dihedral angle at the groove root with a surface profilometer. At 1535°C in air, the relative grain boundary energy increases with tilt angle up to about 20 degrees and then remains relatively constant with increasing angle. A strong temperature dependence of boundary energy is explained by segregation of point defects to the boundary. Grooving kinetics are controlled by volume diffusion of nickel, and a theoretical discussion of mass transport in nonstoichio‐metric solids is given, predicting this behavior under certain conditions.