Formation of quasicrystals in bulk glass forming Zr–Cu–Ni–Al alloys

Köster, Uwe; Meinhardt, Jürgen; Roos, Stefanie Ricarda; Liebertz, H.

doi:10.1063/1.117364

Cited by 378 publications

(170 citation statements)

References 1 publication

Supporting

Mentioning

164

Contrasting

Unclassified

Order By: Relevance

“…Then, the question whether the ISRO is also able to quasicrystallize into I-phase is raised naturally. In view of the fact that the ISRO directly quasicrystallized into I-phase as the primary phase during solidification of Zr 39.5 Ti 39.5 Ni 21 melts and I-phase was observed frequently during primary crystallization of Zr-based MGs, 18,21,22 it is supposed that I-phase should be involved in the primary phases during crystallization of the Zr 65 Ti 10 Ni 25 MG. In order to confirm this assumption, a careful survey based on HRTEM experiments was conducted.…”

Section: -2mentioning

confidence: 99%

“…In previous reports, 21,22,34,35 the primary phase includes only one metastable phase, either an fcc crystalline phase or an I-phase, precipitated from amorphous matrix. Eckert et al 20 found that the metastable I-phase and fcc-Zr 2 Ni-type phase can be formed simultaneously as primary phases during crystallization of Zr 65 Al 7.5 Cu 17.5 Ni 10 MG when the alloy contains a certain amount of oxygen, indicating that the primary phase is sensitive to oxygen content of the materials.…”

Section: -2mentioning

confidence: 99%

“…As such, the I-phase has smaller nucleation barrier as compared with crystal phases and preferentially becomes the primary phase during crystallization of MGs. [20][21][22] On the other hand, in addition to topological ISRO, the atomic clusters with the characteristic of lattice-type chemical SROs ͑CSROs͒ due to the effect of chemical interactions among unlike constituent elements are also observed in many multicomponent MGs. 10,11,17,23 These lattice-type SROs and MROs can act as prenuclei or nucleation sites during crystallization of MGs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Liu

Chen

Liu

2010

Journal of Applied Physics

View full text Add to dashboard Cite

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.

show abstract

Section: -2mentioning

confidence: 99%

Section: -2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Liu

Chen

Liu

2010

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…5 Recently, quasicrystals were observed by crystallization of multicomponent alloy systems, such as ZrCuAl, ZrCuNiAl, ZrCuAlPd, ZrTiCuNiAl, and ZrAlNiCuAg amorphous alloys. [6][7][8][9][10] Such systems have a high glass forming ability and are stable against crystallization for long times in the temperature range of the supercooled liquid above the glass transition. They can be produced in the form of metallic bulk glasses.…”

Section: ͓S0003-6951͑00͒00949-9͔mentioning

confidence: 99%

Formation of quasicrystals in Zr46.8Ti8.2Cu7.5Ni10Be27.5 bulk glass

Wanderka¹,

Macht²,

Seidel³

et al. 2000

Applied Physics Letters

View full text Add to dashboard Cite

“…For example, for heating rates of р10 K/min, the MA sample behavior merges with that for the liquid-quenched sample indicating a similar relaxation state. Indeed, at the merging point of 10 K/min, which corresponds to a characteristic time of about 10 2 s, the reported diffusivity in amorphous Zr-Al-Cu-Ni alloys (10 Ϫ19 -10 Ϫ20 m 2 /s) 15 implies a diffusional distance comparable to the nearest-neighbor separation ͑i.e., 0.3 nm͒. For heating ranges Ͼ10 K/min, the relaxation scales of the samples diverge.…”

mentioning

confidence: 99%

Glass formation in a multicomponent Zr-based alloy by mechanical attrition and liquid undercooling

Sagel

Wunderlich

Perepezko

et al. 1997

Applied Physics Letters

View full text Add to dashboard Cite

The synthesis of a multicomponent Zr 60 Al 10 Ni 9 Cu 18 Co 3 glass by mechanical alloying has been investigated using thermal and structural analysis and compared with a metallic glass produced by liquid undercooling. The solid-state amorphization reaction is preceded by rapid solution of smaller solute atoms in the Zr matrix with a concomitant reduction in grain size to 10 nm at the amorphization onset. A fully amorphous mechanically alloyed sample shows relaxation compared to a sample synthesized by liquid cooling probably due to removal of residual inhomogeneities on the scale of the nanocrystal size at amorphization. While the kinetic pathways for the two synthesis methods differ, the relaxed amorphous phases from each method exhibit identical thermodynamic properties. © 1997 American Institute of Physics. ͓S0003-6951͑97͒01705-1͔Glasses can be obtained by several routes including ͑i͒ incorporating static disorder into a crystalline phase mixture through solid-state processes or ͑ii͒ freezing in dynamic disorder through sufficient undercooling of the liquid at a composition outside the polymorphous melting temperature T 0 . 1 The equivalence of the amorphous state achieved by the two pathways is of interest in terms of the evolution of the amorphization ͑am͒ processes. This issue is addressed in the present study by examining the structural and thermal properties of a multicomponent Zr 60 Al 10 Ni 9 Cu 18 Co 3 glass, which is representative of a wider class of new alloys. 2 Multicomponent Zr-based alloys have recently been shown to produce bulk glassy metals at liquid cooling rates as low as 1-500 K/s. 3,4 While all of the factors responsible for the easy glass formation have not been fully identified, it is evident that multicomponent interactions can be important. 5,6 In the present work, powder samples synthesized by mechanical alloying ͑MA͒ are compared with liquid-quenched samples of the same composition.Elemental powders of 99.99% purity with the composition Zr 60 Al 10 Ni 9 Cu 18 Co 3 were mechanically alloyed under a high purity Ar atmosphere in a Spex ball mill with a powderto-ball ratio of 6:1. 7 After 36 h of ball milling, the oxygen and the Fe content were determined by EDX to be approximately 1 at. %. Liquid-quenched samples with about 50 m thickness were also produced in a splat quenching device. X-ray diffraction spectra ͑XRD͒ were obtained with an Enraf Nonius goniometer with a large-angle position sensitive detector ͑Inel CPS 120͒. Thermal analysis was performed with a Perkin Elmer DSC-7 in Al pans under purified Ar atmosphere. Temperature and specific heat calibrations were carried out with melting point and heat of fusion of indium and zinc.The XRD spectra taken at different stages of the milling process are characterized by the disappearance of the elemental Ni, Co, Cu, and Al peaks and a shift in the Zr ͑101͒ peak to higher 2⌰ values in Fig. 1͑a͒. From observations on binary powder mixtures, 7,8 this is indicative of the subsequent dissolution of Ni, Cu, Co, and Al in the Zr matrix with ...

show abstract

Formation of quasicrystals in bulk glass forming Zr–Cu–Ni–Al alloys

Cited by 378 publications

References 1 publication

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

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

Formation of quasicrystals in Zr46.8Ti8.2Cu7.5Ni10Be27.5 bulk glass

Glass formation in a multicomponent Zr-based alloy by mechanical attrition and liquid undercooling

Contact Info

Product

Resources

About