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Behavior of Pores in the Sintering of Acicular Fe 2 O 3 Powder
Author(s) -
YAMAGUCHI TAKASHI,
KOSHA HIDEAKI
Publication year - 1983
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.1151-2916.1983.tb10019.x
Subject(s) - acicular , sintering , materials science , equiaxed crystals , isothermal process , shrinkage , hysteresis , metallurgy , particle (ecology) , porosimetry , composite material , chemical engineering , porosity , microstructure , porous medium , thermodynamics , condensed matter physics , geology , engineering , physics , oceanography
The sintering of acicular Fe 2 O 3 powder was studied by isothermal dilatometry, hysteresis Hg porosimetry, and SEM of powder compacts using a resin‐impregnating technique, and compared with an ordinary equiaxed powder. It is shown that the pores in the acicular powder compacts remain connected until a later stage of sintering than those in the spherical powder, and that the observed rapid initial densification, along with preferential shrinkage in the parallel‐to‐pressing direction, can be interpreted in terms of particle rearrangement.