Pd40Ni40Si5P15 bulk metallic glass properties variation as a function of sample thickness

This work presents a comparative study of different properties variation of Pd40Ni40Si5P15 bulk metallic glass (BMG), namely: density, hardness, relaxation enthalpy and mechanical properties as a function of the sample thickness. The samples were produced in the form of a long pyramid by conventional Cu-mold casting in an Ar atmosphere. The results illustrate significantly different sensitivity of these properties of the glassy phase to the cooling rate. The difference in crystallization behavior is also discussed.

► Differences in hardness, density and deformation of a metallic glass by thickness.
► A clear difference in the state of different samples reflected as the change in relaxation enthalpy.
► Larger excess volume may be more important factor than the size of structural units.