Abstract
Properties of the rapidly solidified AlFeCrSi powder alloys for elevated temperatures applications were studied in presented work. Three alloys with varying iron and chromium contents were prepared by the melt atomization by pressure nitrogen. After sieving the separated powder fractions were annealed at 350 °C. Microstructures, phase composition and hardness of powders were evaluated as a function of annealing time. The results showed that increasing chromium content led to the deviation of crystallization mechanism from eutectic to the peritectic type. This causes the formation of intermetallic phase particles of a favourable nearly equiaxed morphology. The examination showed the positive influence of chromium on the properties and thermal stability of powders.

Key words
Al alloys for elevated temperatures, powder metallurgy, rapid solidification, X-ray diffraction

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