Evaluation of the parameters related to glass-forming ability of bulk metallic glasses

Some parameters of the alloys, such as S-mix, T-m, Delta H-m, Delta d, Delta e and nu are calculated by using the weighted averages principle. The correlation coefficients between the related parameters and R-c, T-rg and Delta T-x are calculated based on the statistics. In particular, the relationships between three related parameters, i.e., Delta d, Delta e and nu, and R-c are researched, respectively. The results are shown: S-mix, T-m and Delta H-m all are advantageous of the increase of the glass-forming ability (GFA) of the alloy. Delta T-x is better than T-rg for describing the GFA of the alloy from the point of statistics view, but two parameters are not suitable for the description of the GFA. The optimum phenomena are found in the relationships between R-c and three parameters, such as Delta d, Delta e and nu, respectively. Based on the above-mentioned results, in order to enhance the GFA of the alloy, the match among the atomic percentage, Delta d, Delta e and nu must be harmonious. The optimum composition of the components in the alloy and optimum atomic percentage of additives may be related to the relations related above. (C) 2004 Elsevier Ltd. All rights reserved.