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Effect of Green‐State Processing on the Sintering Stress and Viscosity of Alumina Compacts
Author(s) -
Guillon Olivier,
Rödel Jürgen,
Bordia Rajendra K.
Publication year - 2007
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.1551-2916.2007.01572.x
Subject(s) - sintering , materials science , pressing , viscosity , microstructure , composite material , stress (linguistics) , homogeneous , mineralogy , thermodynamics , geology , philosophy , linguistics , physics
Uniaxial viscosity and sintering stress of pressure filtrated alumina compacts were evaluated from sinter‐forging measurements. At a particular density, significantly higher values of sintering stresses are observed compared with specimens made by uniaxial dry pressing followed by cold isostatic pressing. In addition, the uniaxial viscosity at a given density is lower for the pressure‐filtrated samples. These differences may be explained by a more homogeneous microstructure and finer pore size and emphasize the importance of green density and packing on the evolution of the constitutive parameters for crystalline materials.