Atomization of Al-rich alloys: Three paradigmatic case studies
2018
García Escorial, Asunción | Lieblich, Marcela | Comisión Interministerial de Ciencia y Tecnología, CICYT (España) | Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
In this work we present our results on three aluminum rich alloys processed by atomization: AlFeNd, AlFeCrTi, and Al Ni, for structural and functional applications. Amorphous and a nanocomposite microstructure, formed by nanocrystals of α-Al embedded in a remaining amorphous matrix, are obtained in the atomized AlFeNd powder particles. Bars produced by extrusion of this powder present yield strength above 700 MPa. Atomized AlFeCrTi powder particles contain a high proportion of quasicrystalline precipitates, stable up to 500 °C. At 300 °C, AlFeCrTi extruded bars present ultimate tensile strength as high as 280 MPa. Raney alloy, Al Ni, is of high interest as a catalyst. When it is atomized, the particles present a fine dendrite microstructure, which is very suitable for catalyst reactions once the Al rich phases have been leached away.
Show more [+] Less [-]We are indebted to Prof. M. Torralba, pioneer of the atomization at CENIM, and we thank all our coauthors in these works as well as the funding of the Brazilian CAPES and FAPESP; the European Union, “Nano-Al” EC Network, and IMPRESS Project VI FP; the European Space Agency, ESA- NEQUISOL project; and the Spanish CICYT MAT2003-00722 projects.
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