Abstract
The features of changes in the morphology, structural-phase state and microhardness of 3Ni-Al powder mixture after different duration of high-energy ball-milling have been studied. Three main stages of the evolution of the structural-phase state were revealed, which, corresponding to different duration of treatment, differ in the morphology of the powder mixture, distribution of components, phase compositions and the nature of changes in microhardness. It was found that under high-energy ball-milling conditions, the synthesis of intermetallic Ni3Al and NiAl phases begins at much lower temperatures compared to the phase diagram. It is shown that an increase in the duration of high-energy ball-milling is accompanied by a transformation of the phase composition, the features of which determine the level of strengthening of the powder mixture studied.
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