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Chemistry LibreTexts

7.5: Amorphous Alloys

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    Alloys of metals with more complex stoichiometries can be made in amorphous form by slower cooling from the melt. These alloys have been prepared and studied since the 1960s, and since the 1990s amorphous alloys have been discovered that can be prepared in bulk form at cooling rates on the order of 1 deg/s, similar to the cooling rates of other kinds of glasses.


    Currently amorphous metals (marketed under the tradenames Vitreloy and Liquidmetal) are used commercially in golf clubs, watches, USB flash drives, and other applications where very high elasticity, yield strength, and/or wear resistance are needed.

    Year Alloy Cooling Rate (K/s)
    1960 Au75Si24 106 - thin films & ribbons[3]
    1969 Pd-Cu-Si 100-1000
    1980s La-Al-Cu & others 1-100
    1990s Zr-Ti-Cu-Ni-Be ~1 (similar to oxide glasses)