Abstract:

In this paper the critical cooling rate, Rc, for the glass formation of Fe80P13C7 alloy has been determined using both Uhlmann’s and Barandiaran-Colmenero’s method. In Uhlmann’s method, all kinds of the expres­sions of ΔG^l−s (T )and η (T ) determined using the different modes and methods had been investigated. It is indicated that the Rc for the glass formation of Fe80P13C7 alloy can be estimated to be 349 K/s by Uhlmann’s method based on the appropriate expressions of ΔG^l−s (T )and η (T ). The calculated result accords with our experimental result. The Rc for the glass formation of Fe80P13C7 alloy has also been determined to be 0.49 K/s using Barandiaran-Colmenero’s method. This resultant Rc is unreasonable low and it indicates that Barandiaran­Colmenero’s method does not suit to Fe-based alloy.

Key words: Glass formation ability, Critical cooling rate, Fe80P13C7 alloy