Phase Separation in Rapid Solidified Ag-rich Ag-Cu-Zr Alloys

AUTOR(ES)

Niyomsoan, Saisamorn, Gargarella, Piter, Chomsaeng, Natthaphol, Termsuksawad, Preecha, Kühn, Utha, Eckert, Jürgen

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

17/11/2015

RESUMO

The microstructure and phase formation of rapid solidified Ag-rich Ag-Cu-Zr alloys were investigated. Two types of structure; interconnected- and droplet-type structures, were obtained due to phase separation mechanisms. The former was spinodal decomposition and the later was nucleation and growth mechanism. Depending on the alloy compositions, three crystalline phases; FCC-Ag, AgZr and Cu10Zr7 phases were observed along with an in-situ nanocrystalline/amorphous composite. Vickers hardness testing indicated a significant increase of hardness in the nanocrystalline/amorphous-composite alloy.

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