Effect of Rigid Inclusions on the Densification and Constitutive Parameters of Liquid-Phase-Sintered YBa2Cu3O6+x Powder Compacts |
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Authors: | Samuel M Salamone Laura C Stearns Rajendra K Bordia Martin P Harmer |
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Affiliation: | Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98105;Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015 |
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Abstract: | 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 YBa2Cu3O6+ x and composite powder compacts (YBa2Cu3O6+ x powder with 10 vol% dense inclusions of YBa2Cu3O6+ 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. |
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Keywords: | densification sinter/sintering yttrium barium copper oxide |
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