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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 14    No. 1    February 2004

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Fragility and glass forming ability of Al-Ni-Ce alloy melts
ZHAO Yan(赵 岩), BIAN Xiu-fang(边秀房), SUN Min-hua(孙民华), ZHANG Jun-yan(张均艳)

Key Laboratory of Liquid Structure and Heredity of Materials,
Ministry of Education, Shandong University, Ji nan 250061, China

Abstract:The fragility of Al-Ni-Ce alloy melts with three kinds of different compositions, Al85Ni10Ce5, Al85Ni8Ce7, Al85Ni5Ce10(mole fraction, %), was studied using oscillating-vessel viscometer and differential scanning calorimetry. Their fragility parameters obtained from experiments and theoretic calculation are: 238, 228 and 335 respectively. The results indicate that these three kinds of Al-Ni-Ce alloy melts are very fragile liquids, which kinetically show strong nonArrhenius behaviour in the Angell plot, so they have poor glass forming ability (GFA). The alloy melt Al85Ni5Ce10 has the largest fragility parameter among the three alloy melts. In the preparation of rapidly quenched amorphous ribbons, Al85Ni10Ce5 and Al85Ni8Ce7 can gain amorphous ribbons when the rotate speed of the roller reaches 800 r/min, while for Al85Ni5Ce10 it must exceed 1 000 r/min.

 

Key words: fragility parameter; viscosity; amorphous; glass forming ability; Al-Ni-Ce alloy

ISSN 1672-7029
CN 43-1423/U

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