CRYSTALLIZATION KINETICS OF THE METALLIC GLASS Zr_(75.9)Ni_(24.1)
ZHANG Qirui(Department of Physics; University of Science and Technology of China; Hefei); CAO Zhiyu (Cental South University of Technology;Changsha); FREYHARDT Herbert C. (Institut far Metallphysik;Universitat Gottingen; FRG)(Manuscript received 15 June; 1985; revised manuscript 25 March; 1986)
Cite this article:
ZHANG Qirui(Department of Physics; University of Science and Technology of China; Hefei); CAO Zhiyu (Cental South University of Technology;Changsha); FREYHARDT Herbert C. (Institut far Metallphysik;Universitat Gottingen; FRG)(Manuscript received 15 June; 1985; revised manuscript 25 March; 1986). CRYSTALLIZATION KINETICS OF THE METALLIC GLASS Zr_(75.9)Ni_(24.1). Acta Metall Sin, 1987, 23(2): 206-211.
Abstract The TTT- curves and kinectic parameters of metallic glass Zr_(75.9)Ni_24.1) have been determined in both isothermal and non-isothermal (continuance scanning) crystallization processes. By means of peak analysis of DSC and the sequent data treatment with a computer program, the overall effective activation energy E= 224～194 kJ/mol and the reaction order n=3.38-3.77 have been obtained respectively. It is suggested that the process in discussion is characterized by eutectic growth with a decreasing nucleation rate. This is in agreement with the results of X-ray diffraction studies reported by Altounian et al. and present authors. A brief discussion about the isothermal and non-isothermal analysis used here and given.
1 张其瑞,Freyhardt H C.低温物理,1984;6:93 2 Zhang Q R, Kerbs H U, Freyhardt H C. In:Eckern V, Schmid A et al. eds. Proc. 17th Int. Conf. on Low Temperature Physics (Contributed papers). Amsterdam: North-Holland, 1985, 1313 3 Zhang Q R, Krebs H U, Freyhardt H C. In: steeb S, et al. eds. Proc. 5th Int Conf. on Rapidly Quenched Metals. Amsterdam: North-Holland 1985, 707 4 Cao Z Y, Fritsch H U, Bergmann H W. Thermochim Acta, 1985; 83: 23-28 5 Cao Z Y, Bergmann H W. Computerwissenschaft-Technik und Ihre Anwendung, Kolloquium der Chinesischen Wissenschaftler in der BRD Cowitean, 2-4 Oktober 1984, Verein der Chinesischen Wissenschaftler 6 Yinnon H, Uhlmann D R. J Non-Cryst Solids, 1983; 54: 253-275 7 Markworth A J, Glasser M L. J Appl Phys, 1983; 54: 3502-3508 8 Christian J W. The Theory of Transformations in Metals and Alloys, 2nd ed. Part I. New York: Pergamon Press, Oxford, 1965, 525 9 Altounian Z, Tu Guohua, Strom-Olsen J O. J Appl Phys, 1983; 54: 3111
