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- Title
Glass formation in Cu<sub>50</sub>Zr<sub>50-x</sub>-Al<sub>x</sub> and (Cu<sub>50</sub>Zr<sub>43</sub>Al<sub>7</sub>)<sub>50-x</sub>Nb<sub>x</sub> alloys.
- Authors
Tavoosi, Majid
- Abstract
In the present work, the effects of Al and Nb elements on the formation of glassy phase in Cu-Zr based bulk metallic glasses (BMGs) have been investigated. In this regards, differentCu50Zr50-x-Alx and (Cu50Zr43Al7)50-xNbxNbx samples with 2 mm in diameter were prepared using arc melting followed by injection casting in water-cooled copper mold. The results illustrated that Al has positive effect on increasing the glass forming ability (GFA) of Cu-Zr system, and it is possible to create a completely glassy structure in Cu50Zr43Al7 sample. In contrast, the addition of Nb has destructive effects on glass forming ability, the homogeneity and final mechanical properties of Cu-Zr-Al BMGs. The segregation of Nb during solidification process and precipitation of brittle B2-CuZr and Cu10Zr7 phases are the main reasons of lower ductility and compressive strength in the presence of Nb element. As-solidified samples containing Nb showed compressive fracture strength in the range of 1000-1650 MPa, which was much lower than Nb-free alloy (2050 MPa). Keywords: Bulk metallic glass; Injection casting; Cu-Zr-Al; Mechanical properties.
- Subjects
COPPER alloys; METALLIC glasses; DIE-casting; MECHANICAL behavior of materials; FRACTURE strength
- Publication
Journal of Ultrafine Grained & Nanostructured Materials, 2023, Vol 56, Issue 2, p205
- ISSN
2423-6845
- Publication type
Article
- DOI
10.22059/jufgnsm.2023.02.09