BMG - Bulk Metallic Glass

Data Sheets

Following video shows clearly the BMG’s elastic grade.

The spheres fall on two different surfaces: the right one is made of stainless steel and the left one of metallic glass. 

The sphere that falls on the BMG bounces and lasts better than the other.

This particular surface follows through elastically the hit, giving back part of the energy to the sphere and returning each time at the original shape.  

The other one suffers passively the hit, giving back low kinetic energy to the object and getting a smaller bounce.