| Original Articles |
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Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion |
| CHEN Qing-Jun1; SHEN Jun1,2; FAN Hong-Bo1;SUN Jian-Fei1;HUANG Yong-Jiang1;MCCARTNEY D. G.2 |
| 1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001
2School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK |
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| Cite this article: |
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CHEN Qing-Jun, SHEN Jun, FAN Hong-Bo et al 2005 Chin. Phys. Lett. 22 1736-1738 |
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Abstract A new Fe-based alloy that can be cast into a fully amorphous rod with a diameter of at least 16mm by the conventional copper-mould casting technique is obtained by partially replacing Fe with Co in a previously reported Fe-based bulk metallic glass. The preliminary thermodynamic analysis indicates that the Co-containing alloy has a significantly lower Gibbs free energy difference between the undercooled melt and the corresponding crystalline solid, compared to the Co-free alloy, reflecting the dramatic role of the Co addition in stabilizing the supercooled melt and facilitating glass formation in iron-based alloys. Here, a new criterion, derived from the classical nucleation and growth theory, is introduced to evaluate the glass-forming ability of Fe-based bulk metallic glasses.
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| Keywords:
61.43.Dq
81.05.Kf
81.30.Fb
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Published: 01 July 2005
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| PACS: |
61.43.Dq
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(Amorphous semiconductors, metals, and alloys)
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81.05.Kf
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(Glasses (including metallic glasses))
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81.30.Fb
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(Solidification)
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