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Effect of Al Addition on Glass Forming Ability and Glass Stability of Ca-Mg-Zn-Cu Based Bulk Metallic Glasses

  • Symposium: Bulk Metallic Glasses IV
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Abstract

The effect of Al addition on glass forming ability (GFA) and stability of the glassy phase against crystallization was studied for Ca-Mg-Zn, Ca-Mg-Cu, and Ca-Mg-Zn-Cu alloys. The glassy alloys were produced by copper mold casting as wedge-shaped samples with thicknesses varying from 0.5 to 10 mm. Thermal properties, such as glass transition, crystallization and melting temperatures, as well as heats of crystallization and melting, were determined for the produced glasses. Partial substitution of Zn or Cu with Al was found to improve the glass stability (GS) against the general tendency to reduce the GFA.

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Notes

  1. Al and Zn are included in parentheses to indicate that they occupy the same structural sites, as discussed in Section III–D.

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Acknowledgments

This work was conducted at the Air Force Research Laboratory, Materials and Manufacturing Directorate (on-site Contract No. FA8650-04-D-5233). Funding through AFOSR Task 01ML05-COR (Capt. B. Connor, Program Manager) is greatly appreciated.

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Correspondence to O.N. Senkov.

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The article is based on a presentation given in the symposium entitled “Bulk Metallic Glasses IV” which occurred February 25–March 1, 2007 during the TMS Annual Meeting in Orlando, Florida under the auspices of the TMS/ASM Mechanical Behavior of Materials Committee.

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Senkov, O., Scott, J. & Miracle, D. Effect of Al Addition on Glass Forming Ability and Glass Stability of Ca-Mg-Zn-Cu Based Bulk Metallic Glasses. Metall Mater Trans A 39, 1901–1907 (2008). https://doi.org/10.1007/s11661-007-9255-x

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