Formation of Co-Cu supersaturated solid solutions by mechanical alloying

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Resumen

Mechanical alloying of elemental Co-Cu powder mixtures, with nominal compositions Co-15, -35, -50, -65 and -85at.%Cu, was carried out by conventional ball-milling. The mechanically alloyed powders have been characterized by XRD, SEM-EMPA and TEM. After long milling times, all the mixtures became supersaturated fcc solid solutions, with lattice parameters which increased with the Cu content. Only the Co-15at.%Cu mixture showed a minor quantity of hcp Co after long milling times. The crystal size revealed by TEM was typically smaller than 30-50 nm. Annealing at 873 K produced grain boundary and matrix precipitation of cobalt in Co-65 and -85at.%Cu.

Idioma originalInglés
Páginas (desde-hasta)243-248
Número de páginas6
PublicaciónMaterials Science Forum
Volumen179-181
DOI
EstadoPublicada - 1995
EventoProceedings of the International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials - Grenoble, Fr
Duración: 27 jun. 19941 jul. 1994

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