Estimation of the glass forming ability of the Ni–Zr and the Cu–Zr alloys

Energetic analysis for optimum amorphous compositions in binary systems

“…3 (b) and (c), the driving forces between x Zr ¼ 0.354e0.486 in the CueZr binary and between x Zr ¼ 0.367e0.426 in the NieZr binary are relatively low, corresponding to the optimum glass forming ranges. The present calculation follows the results obtained by Abe and co-workers [7]. In addition, there are also the optimum glass forming composition ranges between x Hf ¼ 0.32e0.38 in the CueHf binary, x Nb ¼ 0.38e0.47 in the NieNb binary, x Ni ¼ 0.23e0.39 in the TieNi binary, and x Si ¼ 0.13e0.24 in the PdeSi binary as shown in Fig.…”

“…In order to develop amorphous alloy systems with low critical cooling rate and excellent glass forming ability, several indicators or rules have been proposed, including the well known three empirical rules (multicomponent, atomic size mismatch and negative heat of mixing) [1], the reduced glass transition temperature T rg (¼ T g /T m , T g and T m are the glass transition temperature and the liquidus temperature respectively) [2], the supercooled liquid region DT x (¼ T x eT g , T x is the onset temperature for crystallization) [3], and the parameter g (¼ T x /(T g þ T m )) [4]. From a thermodynamic point of view, Inoue and co-workers obtained the critical value of mixing enthalpy (DH) and mismatch entropy (S s ) for the high GFA of multicomponent metallic glasses [5,6]; Abe and co-workers proposed the second order phase transformation model between the supercooled liquid and the metallic glass to estimate the driving force for crystallization and the critical cooling rates for glass formation from the supercooled liquid [7]; Xia and co-workers studied the thermodynamic parameter of GFA g * (f DH amor /(DH inter eDH amor ), DH amor and DH inter are the formation enthalpies of glass and intermetallic compound respectively) to approach the ability of glass formation against crystallization [8]. Several comprehensive summaries on the recent progress in quantifying glass forming ability of metallic glasses from thermodynamic, kinetic and structural aspects are reported [9e14].…”

The glass-forming ability of model metal-metalloid alloys

“…We show that the maximum GFA (minimal R c ) for patchy and LJ particle mixtures as a function of the atomic size ratio σ S /σ L and number fraction of the metalloid component x S coincides with the region where metal-metalloid glass-formers are observed in experiments [20,21]. We also used the patchy particle model to investigate the GFA in systems that form intermetallic compounds [22] since they typically do not possess FCC symmetry.…”

The Ground State Structures and Magnetic Properties of ZrnNi (n=1-9) Clusters from First Principles Calculation

“…Not only pure Ni clusters are the focus of attention [9,26], Ni-Nb alloy has been used in superconducting magnet, the systems show many peculiar properties in the structure and electronic properties when Ni is doped in semiconductor silicon, germanium and bivalent alkali metal clusters [27][28][29]. Ni and Zr alloy has superconducting property [30], what is more important is that it has many advantages compared with other alloy glass, such as positive hall coefficient [31], quantum interference effect [32], big induction conductivity of anisotropy [33], besides, it can exist in large doping concentration scope, therefore the Zr-Ni alloy attracts people's attention [34][35][36]. However, by now the research on geometrical structure and other properties of Zr n Ni clusters in experiment and theory is rare.…”