Phase composition and the micro- and macrostructures of quasi-crystalline powders obtained by plasma-chemical synthesis

Resumo

Quasi-crystalline Al₆₅Cu₂₃Fe₁₂ powders have been obtained by the method of plasma-chemical synthesis. Coarse particles have a spherical form and an inhomogeneous structure because of the laminar growth of crystallites toward the surface of the particles. The influence of heat treatment on phase formation and structuring in Al–Cu–Fe alloys has been studied. It has been found that the heat treatment of as-prepared powders changes the phase relationship in the quasi-crystalline alloy.