Zirconium–aluminium ordering in Zr5Ni4Al—a new superstructure in the family of U3Si2 related intermetallics

Nucleation, growth and impingement modes deduced from isothermally and isochronally conducted phase transformations: Calorimetric analysis of the crystallization of amorphous Zr50Al10Ni40

“…2, represents reflections of only one phase, which is of the Zr 3 Al 2 -type structure (P4 2 / mnm): this phase is interpreted as a metastable, disordered Zr 3 Al 2 -type form of Zr 5 Ni 4 Al with P4 2 /mnm symmetry (for more details, see Ref. [29]). …”

Crystallization of amorphous Zr60Al15Ni25 alloy

“…Such a doubt is eliminated owing to the recent work of Leineweber et al [11]. According to their results, the phase formed in the isochronal crystallization of amorphous Zr 50 Al 10 Ni 40 is a superstructure of the U 3 Si 2 type (P4 2 /mnm) which then transfers into a thermodynamically stable form (P4 2 /m) if the alloy is further annealed for 2 h at 1023 K. Detailed descriptions of the superstructure are presented in Ref.…”

“…According to their results, the phase formed in the isochronal crystallization of amorphous Zr 50 Al 10 Ni 40 is a superstructure of the U 3 Si 2 type (P4 2 /mnm) which then transfers into a thermodynamically stable form (P4 2 /m) if the alloy is further annealed for 2 h at 1023 K. Detailed descriptions of the superstructure are presented in Ref. [11]. In the present work, the crystalline Zr 50 Al 10 Ni 40 sample was obtained by continuously heating the amorphous Zr 50 Al 10 Ni 40 ribbon at 20 K/min to 798 K. Its diffraction pattern can be well fitted by the U 3 Si 2 -typed superstructure.…”

Zr60Al15(Ni,Cu)25 noncrystalline alloys created by referring to ionic arrangements of a garnet structure with molecular dynamics simulations based on a plastic crystal model

“…The conditions include the size of the unit cell, presence and the number of hypothetical clusters and so on. Second, a garnet structure has the ability to create hypothetical crystalline structures in Zr-Al-(Ni,Cu) alloy with compositions of Zr 60 Al 15 Ni 25 and Zr 60 Al 15 Ni 15 Cu 10 . Here, it should be noted that the Zr 60 Al 15 Ni 25 alloy is widely accepted as a BMG [14] and the Zr 60 Al 15 Ni 15 Cu 10 alloy has a close composition to the Zr 65 Al 7.5 Ni 10 Cu 17.5 BMG [15].…”

“…Herein the ability to form a noncrystalline phase and its features of the local atomic arrangements are investigated with MD-PCM for Zr 60 Al 15 (Ni,Cu) 25 alloys with the initial crystalline states created by referring to the ionic arrangements of the Fe 3 Al 2 Si 3 O 12 garnet structure.…”