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Parallelopipedal (60 × 10 × 10-mm) bars obtained by uniaxial compaction of Nb-Al powder mixtures with a stoichiometric NbAl3 composition (75 a/o Al) were submitted to reaction synthesis using the SHS mode (self-propagating high-temperature synthesis). The experimental procedures used were such as to allow for the reaction ignition, propagation, and extinction at a certain plane along the bar length...
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