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Homogenization of Biporous Agglomerated Powder Structures During High‐Temperature Consolidation
Author(s) -
Maximenko Andrey L.,
Olevsky Eugene A.,
Grigoryev Evgeny G.
Publication year - 2015
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/jace.13760
Subject(s) - agglomerate , materials science , homogenization (climate) , spark plasma sintering , sintering , composite material , homogeneity (statistics) , consolidation (business) , hot pressing , pressing , metallurgy , biodiversity , ecology , statistics , mathematics , accounting , business , biology
Specifics of agglomerate densification—important for hot pressing, conventional, and spark plasma sintering of powders—are analyzed based on the biporous material modeling framework. Numerical simulations are utilized to determine what technological parameters can be used to improve the postprocessing homogeneity of agglomerated powder‐based materials. The modeling results indicate that the homogenization during sintering and hot pressing of agglomerated nano‐ and micrometer‐size powders is significantly impacted by the viscosity of grain‐boundary sliding and by the possible existence of high‐intensity diffusion paths along the agglomerate boundaries.