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Predicting the Grain‐Size Distributions in High‐Density, High‐Purity Alumina Ceramics
Author(s) -
Venkataraman Kollengode S.,
DiMilia Robert A.
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.tb05949.x
Subject(s) - materials science , sintering , grain size , ceramic , grain growth , alumina ceramic , composite material , metallurgy , mineralogy , chemistry
This paper discusses the image‐analyzer‐based grain‐size distributions (GSDs) of fully densified ceramics obtained from pressure casting a high‐purity alumina powder, develops an algorithm for predicting the GSDs as a function of sintering time and temperature, and compares of the GSDs thus predicted with those experimentally observed. The GSD data for all sintered specimens, when nondimensionalized in terms of the median grain size, reduced to a single self‐preserving GSD curve. The median grain was predicted as a function of sintering time and temperature using the classical kinetics equation. The GSDs predicted using the algorithm developed tallied well with those that were experimentally obtained.