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Glass-Forming Ability of an Iron-Based Alloy Enhanced by Co Addition and Evaluated by a New Criterion
- Source :
- Chinese Physics Letters. 22:1736-1738
- Publication Year :
- 2005
- Publisher :
- IOP Publishing, 2005.
-
Abstract
- A new Fe-based alloy that can be cast into a fully amorphous rod with a diameter of at least 16?mm 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.
Details
- ISSN :
- 17413540 and 0256307X
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Chinese Physics Letters
- Accession number :
- edsair.doi...........6bdb3493dd3216d50da2167ed0357f04