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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effect of addition of Zn and Al elements on glass-forming ability and
 thermal stability of Mg-Cu-Y bulk metallic glasses
LI Ye-sheng(黎业生), FU Qun-qiang(付群强), WU Zi-ping(吴子平), DONG Ding-qian (董定乾)

(School of Materials and Chemical Engineering, Jiangxi University of Science and Technology,
Ganzhou 341000, China)

Abstract:After substituting partial Cu and Mg with Zn or Al elements for Mg65Cu25Y10 alloy, respectively, the metallic glass plate samples with thickness of 2−3 mm were prepared by water-quenching, their respective glass-forming ability and thermal stability were studied by using differential thermal analysis (DTA) and X-ray diffraction (XRD). Using Kissinger equation, the activation energies of crystallization of these metallic glasses heated with a constant rate were calculated. The results show that Al element is greatly harmful to the glass-forming ability of Mg-Cu-Y alloys and cannot acquire bulk amorphous alloys; nevertheless, the effect of Zn element addition is indeterminate for various components. The magnitudes of thermal stability are also revealed.

 

Key words: Mg-based alloy; metallic glasses; glass-forming ability; thermal stability

ISSN 1672-7029
CN 43-1423/U

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