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Effect of Grain Boundary Structure on Diffusion‐Induced Grain Boundary Migration in BaTiO 3
Author(s) -
Wang SeongMin,
Kang SukJoong L.
Publication year - 2005
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.1551-2916.2005.00586.x
Subject(s) - grain boundary , materials science , boundary (topology) , diffusion , grain boundary diffusion coefficient , grain boundary strengthening , effective diffusion coefficient , mineralogy , crystallography , condensed matter physics , composite material , microstructure , thermodynamics , chemistry , mathematics , physics , radiology , magnetic resonance imaging , medicine , mathematical analysis
The effect of grain boundary structure, either rough or faceted, on diffusion‐induced grain boundary migration (DIGM) has been investigated in BaTiO 3 . SrTiO 3 particles were scattered on the polished surfaces of two kinds of BaTiO 3 samples with faceted and rough boundaries and annealed in air for the samples with faceted boundaries and in H 2 for those with rough boundaries. In the BaTiO 3 samples with rough boundaries, an appreciable grain boundary migration occurred. In contrast, grain‐boundary migration hardly occurred in the BaTiO 3 samples with faceted boundaries. The migration suppression observed in the sample with faceted boundaries was attributed to a low boundary mobility. The present experimental results show that DIGM is strongly affected by the boundary structure and can be suppressed by structural transition of boundaries from rough to faceted.