Abstract
The alignment of grains in sintered pellets of Bi1.6Pb0.4Sr2Ca2Cu3Ox with platelet microstructure, has been achieved by compressive deformation in air in the temperature range 830-860 degrees C. Due to rapid cooling after deformation at elevated temperatures, glassy and non-superconducting phases were formed from the partial melt, as indicated by the change in intensities of the X-ray diffraction pattern. As a result, Tc of the deformed pellet was sometimes lower than that of the undeformed pellet by a few kelvin and transport Jc at 77 K did not increase appreciably, even though there was considerable alignment of grains. The density of the pellets, deformed at 860 degrees C to 33.5% engineering strain, reached about 96% of the theoretical density. The Vicker's microhardness also increased due to the hot deformation.
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