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
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
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.
CHEN Qing-Jun; SHEN Jun; FAN Hong-Bo;SUN Jian-Fei;HUANG Yong-Jiang;MCCARTNEY D. G.. Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion[J]. 中国物理快报, 2005, 22(7): 1736-1738.
CHEN Qing-Jun, SHEN Jun, FAN Hong-Bo, SUN Jian-Fei, HUANG Yong-Jiang, MCCARTNEY D. G.. Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion. Chin. Phys. Lett., 2005, 22(7): 1736-1738.
2005, Vol. 22 
