Why are amorphous metal powders difficult to die compactSolu

Why are amorphous metal powders difficult to die compact?

Solution

Amorphous metal is usually an alloy rather than a pure metal. The alloys contain atoms of significantly different sizes, leading to low free volume in molten state. The viscosity prevents the atoms moving enough to form an ordered lattice. The material structure also results in low shrinkage during cooling, and resistance to plastic deformation. The absence of grain boundaries, the weak spots of crystalline materials, leads to better resistance to wear and corrosion.

But one drawback of Amorphous metals is they are technically glasses, are also much tougher and less brittle.

Hence resistance offer is way more. Hence they are difficult to die compact.

Amorphous steel is a very brittle material which makes it difficult to punch into motor laminations