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How are metallic glasses formed?

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in Engineering Physics II by (679k points)
How are metallic glasses formed?

(a) By increasing the rate of heating

(b) By increasing the rate of cooling

(c) By melting it

(d) By rapidly heating and then cooling slowly

This question was addressed to me during a job interview.

My question is from Metallic Glasses in portion Advanced Engineering Materials of Engineering Physics II

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The correct choice is (b) By increasing the rate of cooling

Explanation: Metals can be made into a glassy state by increasing the rate of cooling to a very high level. At that state the atoms will not be able to arrange orderly because of its rapid cooling rate. Thus, the atoms will not be allowed to go to crystalline state, rather it goes to amorphous state and it will form a new type of material. Such materials are called metallic glasses.

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