| Powders of the Al92Fe3Cr2Mn3 quaternary alloy were produced by spray atomization processing; then they were processed by warm extrusion to obtain extruded ingots. The results revealed that in both the powder particles and the extruded bulk samples, α-Al, quasicrystalline and intermetallic phases coexist. The quasicrystalline phase was observed as aggregates and its decomposition to crystalline phase occurs above 500 œC. Microstructural changes after extrusion were not observed, indicating that the quasicrystalline phase and the intermetallic compounds are stable against coarsening during the time and temperature of extrusion. The presence of micro-porosities after the extrusion is attributed to the spherical form of the powders and mainly to the high volume of intermetallic faceted-particles. |
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