Relating the combinatorial materials chip mapping to the glass-forming ability of bulk metallic glasses via diffraction peak width

Abstract

There is a gap between the cooling rate of thin film deposition (∼108 K/s) and bulk metallic glass (BMG) casting (∼103 K/s). In this work, we tried to corelate the glass-forming range (GFR) determined from the combinatorial materials chip (CMC) with the glass-forming ability (GFA) of BMG. Data from five CMCs and the reported critical casting diameter (Dmax) of BMGs were used as the dataset. It is found that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of the GFA of BMG as suggested by Liu et al. [1]. Strong positive correlations between the FWHM and Dmax are shown in the Zr-, Ag-, Cu-, Fe-, La-, and Mg-based BMG systems. Furthermore, the Pearson correlation coefficients of the symbolic regression (SR) models indicate possible similarity in the GFA natures of the Ag-Zr, Cu-Zr, Cu-Ag, and Mg-La pairs.