Borides Precipitation in the FeAl40 Intermetallic Compound Produced by Atomization-Deposition Process
The microstructure of FeAl40 intermetallic alloy produced by spray atomization and deposition, with boron additions and reinforced with Al2O3 particles was studied. This technique allowed the co-deposition of particulate reinforcement and the addition of boron in order to obtain a boron concentration of 0.4 at. %. The additions of alumina particles produce a grain refinement. High resolution transmission electron microscopy observations shows a precipitation of boron in the FeAl matrix in despite of the rapid solidification process. Fe3B precipitates were found which is a metastable phase formed during the rapid solidification process. In addition, FeB precipitates were observed.
S. Velumani and René Asomoza
O. Flores et al., "Borides Precipitation in the FeAl40 Intermetallic Compound Produced by Atomization-Deposition Process", Advanced Materials Research, Vol. 68, pp. 96-100, 2009