On the basis of a critical review of the literature data on the AI-Cr-Fe system projections are given for the liquidus and solidus for Fe-rich alloys and the Al corner. Similarly, isotherms from 1150° to 600°C give an outline of the solid phases and their interactions. The accuracy of the information on solid-phase reactions is not high, owing partly to the sluggishness of all reactions involving the Cr-Fe-based σphase. No ternary compounds are known. Detailed studies of lattice spacings and order-disorder reactions are briefly reviewed.
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