Unusual solidification behavior of a Zr–Cu–Ni–Al bulk glassy alloy made from low-purity Zr

Processing of a bulk metallic glass forming alloy based on industrial grade Zr

“…Furthermore, the composition of this alloy was designed considering the dependency of the GFA on the combined presence of Ni and highly concentrated oxygen. Earlier studies revealed unusual solidification behavior of ZreCueNieAl BMG alloys made from low purity Zr where crystallization occurred due to an oxygen-triggered formation of a metastable NiZr 2 -type phase [14,15]. Therefore, we propose a BMG forming alloy called AMZ4 with the nominal composition in at% of Zr 59.3 Cu 28.8 Al 10.4 Nb 1.5 .…”

Structural relaxation and crystallization processes in Cu55Hf25Ti15Pd5 metallic glassy alloy

“…Also a double-stage glass-transition [19] has been recently observed in a Zr 55 Cu 30 Al 10 Ni 5 alloy by using specific heat capacity (C p ) measurements. This alloy also showed a complex solidification behavior [20] when made of low-purity Zr though no clear oxide/ waste particles inclusions were found.…”

Nano-crystallization behavior of Zr–Cu–Al bulk glass-forming alloy

“…Recent investigations have shown that the use of sponge Zr for alloying leads to both homogeneous and to heterogeneous nucleation of different phases by eutectic and primary crystallization mechanisms, respectively [51]. Moreover, the presence of oxygen has a strong influence on the GFA and crystallization behavior of Zr-based alloys [52,53].…”