Answer:

We are unable to offer you a micrograph of a metallic glass alloy. Such photos are, in fact, rare. The reason is that metallic glass alloys have amorphous, or non-crystalline, atomic structures. This is in contrast to the perfectly ordered, crystalline atomic structure in traditional metals. As a result, metallic glass alloys are void of microstructure in the traditional metallurgical sense. The micrograph of a metallic glass is a plain, featureless image. Hence, they are rarely recorded. The reasons for the featureless metallurgical structure are as follows.

Micrographs of crystalline alloys generally exhibit three distinct features. The most prominent of these features is the grain boundary, where one region of perfectly ordered atoms meets, but is not perfectly aligned with, another region of perfectly ordered atoms. The grain boundary, which is situated at the interface of the two perfectly ordered regions, is the result of the mismatch. Metallic glasses have no crystalline structure. Hence, there are no mismatched interfaces and no grain boundaries.

A second feature of traditional metallurgical structures is the contrast between the primary and secondary phases, that is, between regions with different chemistries and/or structures. Metallic glasses are single phase, solid solutions. Hence, there are no secondary phases.

A third feature that may be present in traditional microstructures is a crystal defect such as a twin or a dislocation. With no crystalline structure, the metallic glass do not possess such defects.