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A series of Zr-based glasses has been obtained by rapid melt quenching and their thermal characteristics (Tg, Tx, Tl) were determined by DSC/DTA. Some of the most recognized glass forming ability (GFA) criteria were applied to predict the glass forming ability of the alloys and to study its dependence on the alloy composition. As a result, the best glass forming compositions among the studied alloys could be selected. It was found that as a general trend an increase of the Zr content results in Tx and ΔTx (= Tx − Tg) decrease. The determined liquidus temperatures of chosen compositions with substantially different ΔTx were found to vary relatively little. Therefore, it was concluded that the variation in the GFA of the studied alloys is mainly due to difficulties in the crystallization process, rather than to different stability of the melts. [ABSTRACT FROM AUTHOR]

This review presents existing results on the formation of porous metal structures by selective dissolution of metallic glasses. The compositions of the initial amorphous alloys, the conditions of chemical and electrochemical selective dissolution, the morphology and microstructure of the resulting porous structures, and their main applications are included and discussed. The examined results have allowed to make some generalizations concerning the influence of the precursor alloy composition, the type and concentration of electrolytes, temperature, and time of selective dissolution on the phase composition, shape and size of pores and ligaments of the final porous material. Certain conclusions are also formulated to guide potential researchers in the search for suitable amorphous alloys and de-alloying conditions to achieve porous structures with predefined properties and hence sought applications. [ABSTRACT FROM AUTHOR]