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

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.

Automated summary

This study attempts to address the gap in cooling rates between thin film deposition and bulk metallic glass (BMG) casting by correlating the glass-forming range (GFR) determined from combinatorial materials chips (CMCs) with the glass-forming ability (GFA) of BMG. The results show that the full-width at half maximum (FWHM) of the first sharp diffraction peak (FSDP) is a good indicator of BMG GFA, and strong positive correlations between FWHM and the critical casting diameter (Dmax) are observed in various BMG systems. Furthermore, the Pearson correlation coefficients suggest possible similarities in the GFA natures of certain BMG pairs.