Patent ID: 6284191
Filing Date: 2001-09-04
Classification: B22F,C22C

Abstract:
A method of manufacturing an iron aluminide alloy sheet by a powder metallurgical technique, comprising steps of:preparing a powder mire of aluminum powder and iron powder;shaping the powder mixture into a sheet;sintering the sheet at a temperature sufficient to react the aluminum powder and the iron powder and form an iron aluminide, wherein the sintering step is carried out in first and second stages, the first stage comprising heating the sheet to a temperature at which up to one-half of the aluminum powder reacts with the iron powder to form Fe.sub.3 Al, Fe.sub.2 Al.sub.5, FeAl.sub.3 or mixtures thereof, and the second stage comprising heating the sheet to a temperature at which unreacted aaluminum powder melts and reacts with the iron powder to form the iron aluminide.