Department of Materials Science and Engineering, University of Wisconsin-Madison, WI 53706, USA
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DOI:
10.7502/j.issn.1674-3962.2014.05.03
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Abstract:
Metallic glasses are a group of amorphous solids composed mainly of metallic elements. They stay in non-equilibrium states and show metastable characters. Plenty of fresh research hotspots are emerging as a result of their recent booming development. In this brief review, the excellent catalytic properties and high activity of metallic glasses in chemical reactions, i.e. application in degrading azo dyes in polluted water, are overviewed. The experimental results show that the reactivity of ball-milled Mg-based and Fe-based metallic glass powders can be 1000 and 200 times higher than the commercial Fe powders, respectively. Moreover, the reactivity also depends on the preparation methods, i.e. the ball-milled metallic glass powders are more active than the gas-atomized powders. This can be attributed to the high specific surface area and low reaction activation energy after ball-milling. The promising prospects for functional applications and related fundamental researches of metallic glasses are discussed. Keywords: metallic glass; amorphous alloy; chemical reaction; catalysis