Structure and phase composition of alumina powders obtained by chemical dispergating of aluminium alloys with various magnesium content

The results of X-ray phase petrographic analysis and scanning electron microscopy of aluminum hydroxide powders obtained by chemical dispersion of aluminum-magnesium alloys (with a mass fraction in Mg alloys of 0.6, 6 and 12%), as well as powders obtained by calcining these hydroxides. A mechanism for the formation of the structure of powders at various stages of the technological process of its manufacture is proposed: the product of chemical dispersion of the alloy is a powder after heat treatment in air (1400 ° C, 1 h).