Zr-Co-Al bulk metallic glass composites containing B2 ZrCo via rapid quenching and annealing

Yu Chen; Chunguang Tang; Kevin Laws; Qiang Zhu; Michael Ferry

doi:10.1016/j.jallcom.2019.153079

paper

Zr-Co-Al bulk metallic glass composites containing B2 ZrCo via rapid quenching and annealing

arXiv:2310.15521 · doi:10.1016/j.jallcom.2019.153079

Abstract

As a promising remedy for overcoming the limited ductility and work softening of bulk metallic glasses (BMGs), BMG composites incorporating a B2 crystalline phase have attracted considerable attention. Here, we explore the formation of Zr-Co-Al BMG composites by quenching alloys Zr $_{55}$ Co $_{31}$ Al $_{14}$ , Zr $_{54.5}$ Co $_{33.5}$ Al $_{12}$ , Zr $_{53.5}$ Co $_{36.5}$ Al $_{10}$ , Zr $_{52.5}$ Co $_{37.5}$ Al $_{10}$ , and Zr $_{43}$ Co $_{43}$ Al $_{14}$ . We found the first alloy fully amorphous whereas the fifth was fully crystallized upon quenching. The other three were quenched to generate composite structures, with a higher fraction of B2 ZrCo phase with increasing Co/Zr ratio and decreasing Al content. For comparison, the formation of B2 ZrCo in annealed Zr $_{55}$ Co $_{31}$ Al $_{14}$ was also studied. For both approaches the influence of crystalline phases on hardness was examined.

Zr-Co-Al bulk metallic glass composites containing B2 ZrCo via rapid quenching and annealing

Abstract

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