Figure 4
Comparison of composition-dependent GFA obtained from direct measurements with indirect GFA parameters (a) Contours of R C as a function of composition. (b) The measured R C is converted to d C based on casting into a mold with infinite thermal mass and thermal conductivity, i.e. only the thermal properties of the melt were considered39. Given R C in K s−1, the d C in meters is equal to \(\sqrt{\frac{0.01}{{R}_{C}}}\). (c) T rg = T g/T L where T g was estimated41 by first calculating the elastic moduli42,43 and calibrating with a known T g that was determined by calorimetry31 (calculation details discussed in caption of Supplementary Fig. 1), while T L was extracted from the ternary liquidus projection34. (d) Applying an efficient cluster-packing structural model for metallic glasses45, 100% efficiently packed lines for various <Z Si,tot, Z Cu,tot, Z Au,tot> structures were calculated for the composition region of interest. Indicated as a red line is the <10, 13, 15> structure, which is recommended by the authors of the model45 for the Au-Cu-Si system.
