Glass-Forming Ranges

Figure 14.8 shows how the hardness varies with the boron content of FeB glasses. The variation is nearly linear over the glass forming range. 

J. Eckert, L. Schlutz, E. HeUstem, K. Urban, Glass forming range in mechanically alloyed NiZr and the influence of the milling intensity, J. Appl. Physics 64 (1988) 3224. 

A simple method for predicting limits for glass-forming ability (GFA) in metallic alloys was proposed by Saunders and Miodownik (1983). lliey utilised the To criterion to predict the limit to the glass-forming range (GFR) of a number of binary and ternary systems. The To criterion follows the premise diat, if cooling conditions... 

Figorc 11J8. Calculated critical cooling rates for suppression of various phases in (a) Ag-Si and (b) Au-Si from Kambli et al. (1985). Horizontal bars indicate experimental glass-forming range by laser quenching. 

Figure 1U9. Comparison between calculated ( ) glass-forming ranges at 10 K sec and observed ( ) glass-forming ranges at melt spin cooling rates for (a) Pd-Si, (b) Zr-Be, (c) Cu-Zr and (d) Pd-P (Saunders and Miodownik 1988).

Figure 11.40. (a) Calculated critical cooling rates for glass formation in Ti-Zr-Be (Saunders and Miodownik 1988) and (b) observed glass-forming range (Saunders... 

Table 3.1. Experimentally and theoretically obtained glass-forming ranges...

CALPHAD technique for the Ni-Zr system, predicting the glass-forming range for mechanically alloyed Ni-Zr to extend from 33 to 83 at. % Ni (Table 3.1). Miedema calculations [3.59] performed by Weeber and Bakker [3.8] predict 24 to 83 at. % Ni (Table 3.1). On the Ni-rich side, the value determined experimentally [3.34] hits exactly the value predicted by both theoretical techniques, whereas on the Zr-rich side, the experimental value lies between the values of the two theoretical procedures, although here also the results are very... 

Fig. 3.22. Fe-Zr phase diagram and glass-forming ranges for mechanical alloying and rapid quenching [3.22]...

Fig. 3.26. Maximum negative enthalpies of mixing Affm in Co5STM45 alloys calculated by Miedema s model [3.59] and observed glass-forming ranges AGFR [3.57]...

Based on the undercooling theory resulting from the existence of multicomponent chemical short-range order (CSRO) domains, the glass forming range (GFR) in Zr-Ni-Ti alloy system was predicted by thermodynamic calculation. The GFR predicted by the thermodynamic calculation is consistent with the experiment results (Liu, et al. 2008). 

Evaluation of glass forming ranges in alloy systems... 

---