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Effect of Strong Anisotropy in Grain‐Boundary Energy on Boundary Mobility in Abnormally Grown Grains
Author(s) -
Brosh Eli,
Shneck Roni Z.
Publication year - 2004
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.1551-2916.2004.00640.x
Subject(s) - grain boundary , crystallite , materials science , condensed matter physics , anisotropy , grain growth , crystal (programming language) , grain boundary strengthening , phase (matter) , crystallography , chemical physics , grain size , composite material , chemistry , metallurgy , microstructure , physics , optics , organic chemistry , computer science , programming language
The growth of a large crystal into a fine‐grained polycrystal of the same phase is considered through a two‐dimensional model. The macroscopic driving force for growth depends only on the average energy of the grain boundaries of the polycrystalline matrix. The analysis reveals a dependence of the local driving force and effective mobility on the orientation of the interface between the large crystal and the matrix. The orientations with very low energy relative to the neighboring orientations also have low effective mobility. Applications are found in modeling of abnormal grain growth in ceramics and in experiments designed to measure the mobility of grain boundaries.