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Title :Analysis of Cooperativity in Metallic Glass Forming Liquids
Authors :Aniya, Masaru
Ikeda, Masahiro
Issue Date :May-2014
Citation jtitle :Materials Science Forum
vol. :783-786
start page :1889
end page :1894
Abstract :The relation between fragility and cooperativity of atomic motion in bulk metallic glass forming liquids is studied based on the bond strength-coordination number fluctuation model. The model describes the temperature dependence of the viscosity in terms of the mean values of the bond strength, coordination number and their fluctuations of the structural units that form the melt. According to the model, the cooperativity increases with the increase of fragility. The model estimates that the magnitude of the cooperativity N_B extends approximately from 7 to 60 structural units, depending on the material. The temperature dependence of N_B for different metallic glass forming systems reveals that N_B increases with the decrease of temperature. The relation between N_B and diffusivity of atoms is discussed briefly.
URL :http://www.scientific.net/MSF.783-786.1889
Type Local :雑誌掲載論文
ISSN :02555476
Publisher :Trans Tech Publications
Comment :【著者所属】安仁屋勝:熊本大学大学院自然科学研究科(理学系)物理科学 / 池田昌弘:福井工業高等専門学校
URI :http://hdl.handle.net/2298/33502
Appears in Collections:Journal Article (Sciende)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2298/33502