Influence of Cu content on the mechanical properties and corrosion resistance of Mg-Zn-Ca bulk metallic glasses

(Mg66.aZn28.8Cas)10o-xCux (at%, x = 0, 1, 3, and 5) bulk metallic glasses (BMGs) of 2 mm in diameter were prepared by the conventional copper mold injection casting method. Besides, the influence of Cu content on the microstructure, thermal stability, mechanical properties, and corrosion behavior of...

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Veröffentlicht in:International journal of minerals, metallurgy and materials metallurgy and materials, 2014-05, Vol.21 (5), p.487-493
Hauptverfasser: Zhao, Yan-feng, Zhu, Jian, Chang, Li, Song, Jing-guo, Chen, Xiao-hua, Hui, Xi-dong
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Sprache:eng
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Zusammenfassung:(Mg66.aZn28.8Cas)10o-xCux (at%, x = 0, 1, 3, and 5) bulk metallic glasses (BMGs) of 2 mm in diameter were prepared by the conventional copper mold injection casting method. Besides, the influence of Cu content on the microstructure, thermal stability, mechanical properties, and corrosion behavior of Mg-Zn--Ca BMGs was investigated. It is found that the addition of Cu decreases the glass-forming ability of Mg-Zn-Ca BMGs. Crystalline phases are precipitated at a higher Cu content, larger than 3at%. The compressive fracture strength of Mg-Zn-Ca BMGs is enhanced by the addition of Cu. With the formation of in-situ composites, the compressive strength of the Mg-Zn-Ca alloy with 3at% Cu reaches 979 MPa, which is the highest strength among the Mg-Zn-Ca alloys. Furthermore, the addition of Cu also results in the increase of corrosion potential and the decrease of corrosion current density in Mg-Zn-Ca BMGs, thereby delaying their biodegradability.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-014-0933-6