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Sintering of Mullite‐Containing Materials: II, Effect of Agglomeration
Author(s) -
SACKS MICHAEL D.,
PASK JOSEPH A.
Publication year - 1982
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.1151-2916.1982.tb10360.x
Subject(s) - agglomerate , sintering , mullite , materials science , economies of agglomeration , porosity , sphere packing , composite material , grinding , particle (ecology) , chemical engineering , ceramic , engineering , oceanography , geology
The sintering behavior of mullite powder compacts which contained soft and hard agglomerates was studied, The maximum density achieved depended on the size and packing of the agglomerates. Although the initial % total pore volume was kept constant, the presence of larger pores in the green compact, due to larger agglomerates, resulted in lower final densities after sintering. Densification rates were enhanced by the breakdown of agglomerates by grinding. The particle and agglomerate packing arrangements caused densification substages to occur. A schematic model is presented which agrees well with the observed experimental behavior.