Obtainment of the Fe0.70−xCrxAl0.3/Al2O3 nanocomposite by the method of SHS of mechanoactivated Cr2O3 + Fe + Al mixtures

Applying Mössbauer spectroscopy methods, we have studied the structure of nanocomposites obtained by a technique combining the preliminary mechanical activation of an 8.1 wt % Cr 2 O 3 + 65.9 wt % Fe + 25 wt % Al mixture and self-propagating high-temperature synthesis (SHS). It has been found that, at the stage of mechanical activation, an Fe/Al/Cr 2 O 3 composite with a low impurity of the Fe 2 Al 5 intermetallide is formed. At the stage of SHS, the interaction between activated components of the mixture leads to the formation of the Fe 0.7 − x Cr x Al 0.3 ( x = 0 − 0.2)/Al 2 O 3 composite.