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Effect of Rigid Inclusions on the Densification and Constitutive Parameters of Liquid‐Phase‐Sintered YBa 2 Cu 3 O 6+ x Powder Compacts
Author(s) -
Salamone Samuel M.,
Stearns Laura C.,
Bordia Rajendra K.,
Harmer Martin P.
Publication year - 2003
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.1151-2916.2003.tb03392.x
Subject(s) - materials science , sintering , viscosity , phase (matter) , composite material , homogeneous , porosity , liquid phase , constitutive equation , composite number , thermodynamics , finite element method , chemistry , physics , organic chemistry
The presence of rigid inclusions in a powder compact leads to a reduction in the densification rate of the compact and may also lead to processing defects. In this paper, the densification rate and the constitutive parameters of both homogeneous YBa 2 Cu 3 O 6+ x and composite powder compacts (YBa 2 Cu 3 O 6+ x powder with 10 vol% dense inclusions of YBa 2 Cu 3 O 6+ x ) are reported. A small amount of liquid phase, which formed during sintering, was present in the samples. However, even with the presence of a liquid phase, the addition of inclusions still reduces the densification rate of the composite and increases its viscosity. The results have been compared with a published analysis of the problem using measured values of the constitutive parameters. Both the viscosity and viscous Poisson's ratio of the porous body have been measured.