Abstract
We consolidated commercial MgB2 powders by two different shock consolidation methods: the single-stage propellant gunmethod and the underwater shock consolidation method. The samples prepared hadanisotropic resistance–temperature features; the narrowest resistive transition width wasobserved along the directions of shock loading. In contrast, onset temperatures wereindependent of the directions and methods. No grain orientation previously observed wouldhave resulted from the consolidation processes with a very short duration of . The samples showed higher diamagnetism than a cold isostatic pressed (CIPed) sampleat a low field of 1 Oe. However, their diamagnetism relatively degraded with increasingfields and eventually became much less than even that of the CIPed sample. This is duepossibly to thick, much distorted grain boundaries that would have behaved as weak linksat high fields.
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