Superconductivity of TiZrNi alloys containing quasicrystals

Azhazha, V.M.; Grib, Alexander; Khadzhay, G. Ya.; Malikhin, S; Merisov, B. A.; Pugachov, A T

doi:10.1016/s0375-9601(02)01227-6

Cited by 19 publications

(7 citation statements)

References 8 publications

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“…1) presents the superposition of characteristic ␤ phase peaks over a diffuse amorphous halo spread out the 30 • -40 • angular range. The lattice constant of this body-centered cubic (bcc) phase, a ␤ = 0.341 nm, evaluated from the (1 1 0) ␤ diffraction peaks shift, matches parameters mentioned elsewhere for a Ti/Zr solid solution [24,29]. The noticeable absence of (2 0 0) ␤ and (2 1 1) ␤ diffraction peaks is probably due to the solidification technique: planar flow casting may create a strong thermal gradient, leading to a final strong crystallographic texture.…”

Section: As-quenched Structuresupporting

confidence: 53%

Unusual devitrification behaviour in rapidly solidified Ti45Zr38Ni17 alloy

Lefaix

Vermaut

Janičkovič

et al. 2008

Journal of Alloys and Compounds

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Section: As-quenched Structuresupporting

confidence: 53%

Unusual devitrification behaviour in rapidly solidified Ti45Zr38Ni17 alloy

Lefaix

Vermaut

Janičkovič

et al. 2008

Journal of Alloys and Compounds

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“…15,34,35) The peak broadening can be mainly attributed to a size effect of nano-quasicrystalline particles but also to the superposition of these icosahedral features with other characteristic peaks assigned to the crystalline -Ti/Zr (hP2) solid solution (a ¼ 0:311 nm, c ¼ 0:494 nm) and the C14 MgZn 2 -type Laves phase (a ¼ 0:509 nm, c ¼ 0:864 nm). 31) The nature of the as-quenched sample (mixture of nanometric quasicrystalline particles, -(Ti/Zr) solution and C14 Laves phases) was clearly confirmed by TEM examination.…”

Section: Resultsmentioning

confidence: 99%

Surface Properties of a Nano-Quasicrystalline Forming Ti Based System

et al. 2007

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Two decades of intense research on quasicrystalline materials have suggested their potential use as surface coatings, considering their low coefficient of friction, high hardness, good corrosion and wear resistances and low surface energy. In that sense, quasicrystals could be introduced into the field of biomaterials since biomolecules are well known to be sensitive to solid surface properties. In this paper we report on investigations of the early stage of oxidation of the quasicrystals forming Ti 45 Zr 38 Ni 17 alloy and its surface reactivity with respect to an aminoacid. After analysing the microstructure of as-quenched ribbons both by transmission electron microscopy and X-ray diffraction, surface oxide layers were characterized by X-ray Photoelectron Spectroscopy (XPS). Oxidation of Ti 45 Zr 38 Ni 17 results in the formation of a ZrO 2 /TiO 2 barrier oxide layer, avoiding toxic Ni release. This latter is mainly present at the oxide/alloy interface. Thereafter, adsorption of L-glutamic acid has been investigated by infrared spectroscopy. Even if this biomolecule is found to adsorb to each substrate, it seems to display different adsorption mechanisms on quasicrystalline ribbons compared to that on pure titanium (CpTi) or on pure zirconium (Zr), leading to a weaker signal on Ti 45 Zr 38 Ni 17 . We discuss these results along with the affinities of each alloying metal to oxygen and with the peculiar electronic properties of quasicrystals which could affect the surface properties of Ti 45 Zr 38 Ni 17 .

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“…As initial elements we used Ti, Zr, and Ni of 99.9 purity. 4 The tangential velocity of the disk surface at quenching was vϭ19.5 and 25 m/s ͑samples S19 and S25, respectively͒. X-ray fluorescence chemical composition control showed less than 0.5% deviation of the resulting sample composition from the nominal one.…”

Section: Samplesmentioning

confidence: 90%

Electrical resistivity of Ti41.5Zr41.5Ni17 quasicrystals in the temperature region 0.3–300 K

Azhazha

Khadzhay

Merisov

et al. 2005

Low Temperature Physics

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The electrical resistivity of icosahedral quasicrystals Ti 41.5 Zr 41.5 Ni 17 is investigated in the temperature region between 0.3 and 300 K on samples of different quality. At temperatures between 0.3 and 2 K the influence of external magnetic fields up to 16 kOe on the superconducting transition of these materials is investigated. The temperature dependence of the resistivity in the region of the superconducting transition varies in a step-like manner. The data of the x-ray analysis imply the presence of several different quasicrystalline phases. Above the superconducting transition a resistivity minimum is observed.

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Superconductivity of TiZrNi alloys containing quasicrystals

Cited by 19 publications

References 8 publications

Unusual devitrification behaviour in rapidly solidified Ti45Zr38Ni17 alloy

Unusual devitrification behaviour in rapidly solidified Ti45Zr38Ni17 alloy

Surface Properties of a Nano-Quasicrystalline Forming Ti Based System

Electrical resistivity of Ti41.5Zr41.5Ni17 quasicrystals in the temperature region 0.3–300 K

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