Internal clusters in crystalline phases related to Zr-based bulk amorphous alloys

Effect of Fe on the glass-forming ability, structure and devitrification behavior of Zr–Cu–Al bulk glass-forming alloys

“…A few eutectic colonies consisting of Zr 2 Cu (tI6) and a ternary phase were seen in the sample annealed at 713 K for 600 s ( Figure 6). The Zr 2 Cu (tI6) phase is reported to contain truncated octahedron clusters centered with Zr and Cu atoms, which have a coordination number of 12 [31]. The structure of the ternary phase is close to that of another ternary Temp.…”

Hugoniot-compression curve of Zr-based bulk metallic glass

“…The crystal structures of the first and third compounds are Bergman clusters containing first and second shells, and one of the second compound consists of unit cell of tI-Zr 2 Cu and truncated octahedral with Zr or Cu as center in tL-Zr 2 Cu. 6 It was reported that in the glassy state of Zr 65 Ni 10 Cu 7.5 Al 7.5 Ag 10 alloy the icosahedral short-range order was likely to have already existed. 14,15 The present Zr 55 Al 10 Ni 5 Cu 3 glass alloy may have similar short-range order structure.…”

Atomic packing in Mg61Cu28Gd11 bulk metallic glass

“…This is similar to the structural relationship between a truncated octahedron ͑cuboctahedron͒ and an icosahedron. 19 It was reported that icosahedron is the major configuration existing in monatomic liquids. 20 However, for a complex alloy, our results show that although polyhedra consisting of 12 atoms surrounding a central atom are dominant in the Mg 61 Cu 28 Gd 11 glass and melt, they are usually not the perfect icosahedra or cuboctahedra, but often contain the structural features of both, i.e., tetrahedral packing and half-octahedral packing.…”