Correlation between primary phases and atomic clusters in a Zr-based metallic glass

Abstract

Electrical and spectroscopic analysis in nanostructured SnO2: "Long-term" resistance drift is due to in-diffusion J. Appl. Phys. 110, 093711 (2011) Study on the structural and physical properties of ZnO nanowire arrays grown via electrochemical and hydrothermal depositions J. Appl. Phys. 110, 094310 (2011) Silver/silicon dioxide/silver sandwich films in the blue-to-red spectral regime with negative-real refractive index Appl. Phys. Lett. 99, 181117 (2011) Fluorescence enhancement of light-harvesting complex 2 from purple bacteria coupled to spherical gold nanoparticles Appl. Phys. Lett. 99, 173701 (2011) Optical study of the effect of the impurity content on the ferroelectric properties of Er3+ doped SBN glassceramic samples J. Appl. Phys. 110, 084113 (2011) Additional information on J. Appl. Phys. Atomic clusters exiting in the Zr 65 Ti 10 Ni 25 metallic glass and primary phases generated during crystallization were studied by x-ray scattering and high-resolution transmission microscopy. An intrinsic correlation between the atomic clusters and the primary phases has been revealed. It is found that there are topological icosahedral short-range orders ͑ISROs͒ in the as-cast sample in addition to fcc-Zr 2 Ni-type chemical SROs. These topological ISRO and fcc-Zr 2 Ni-type chemical SRO can simultaneously quasicrystallize/crystallize into the corresponding nanoscaled icosahedral quasicrystalline phase ͑I-phase͒ and fcc-Zr 2 Ni crystal as primary products during crystallization. The synchronic precipitation of these two metastable phases can be understood in terms of their structural similarity between the fcc-Zr 2 Ni and I-phase in local atomic configuration. In comparison with fcc-Zr 2 Ni crystal, the I-phase has a smaller size and lower volume fraction due to its lower growth rate attributed to its more complex composition and higher structural symmetry. The competitive growth between these two phases results in the development of nanostructured materials in this alloy after annealing.

Effects of solute–solute avoidance on metallic glass formation

“…According to the crystallization data of the four MGs [11,37,38], the (FeM)-type clusters in the alloy melts fit the corresponding Fe 3 M-type crystallization phases. The experimental finding has confirmed the intrinsic correlation between the atomic clusters existing in MGs and the primary phases developed during crystallization of MGs [39]. These results suggest that multispecies clusters increase the stability of melts.…”

Revisiting Al-Ni-Zr bulk metallic glasses using the ‘cluster-resonance’ model

“…Although not entirely convincing the existing experimental evidence discloses a local structure similarity between metallic glasses and their crystalline counterparts [17][18][19]. A strongly negative mixing enthalpy exists between Ni and Zr at a 1:1 atomic ratio.…”