Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta

Moreen, H. A.; Taggart, R.; Polonis, D.H.

doi:10.1007/pl00020645

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…At x = 0.11 a possible Ni 8 V structure is indicated in the phase diagram. It only forms if V is substituted with larger elements 29 , Ta or Nb, below T o ≈ 400 • C. It is therefore not expected here as an ordered phase, but short range order (SRO) is possible 30 . The SRO of selected concentrations x = 1/9, 1/4, 1/3 in Ni-V has been studied 30,31 around T o .…”

Section: Phase Diagram Of Ni1−xvxmentioning

confidence: 90%

“…The other superstructure Ni 3 V forms from the disor-dered fcc phase below T o = 1045 • C in a higher concentration range around x = 0.25, depending on sample growth conditions and heat treatments 26,29 . Ni 3 V crystallizes in the SO 22 structure, a body-centered tetragonal structure with 2 fcc unit cells along the c-direction 37 , where c/a > 2.…”

Section: Pair Distribution Function Analysis Of Ni1−xvxmentioning

confidence: 99%

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Study of atomic disorder in Ni-V alloys

Gebretsadik¹,

Wang²,

Alyami³

et al. 2023

Preprint

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We present a pair distribution function (PDF) analysis from neutron diffraction data of the Ni1−xVx alloy in the Ni-rich regime. Such structural study aims to clarify the origin of the magnetic inhomogeneities associated with the quantum Griffiths phase close to the ferromagneticparamagnetic quantum phase transition. The PDF analysis successfully reveals the details of the structure and chemical distribution of our Ni1−xVx polycrystalline samples prepared with hightemperature annealing and rapid cooling protocol. This study confirms the expectations that all Ni1−xVx samples with 0 ≤ x ≤ 0.15 crystallize in a single phase fcc structure with some residual strain. The increase of the lattice constant and the atomic displacement parameter with Vconcentration x is consistently explained by a random occupation of V and Ni-atoms on the lattice, with a radius ratio (rV/rNi) of 1.05. Probing alternate, simple models of the local PDF, such as V-clusters or ordered structures (Ni8V, Ni3V) give inferior results compared to a random occupation. This investigation strongly supports that the magnetic clusters in the binary alloy Ni1−xVx originate from Ni-rich regions created from random occupation rather than from chemical clusters. It reveals that Ni1−xVx is one of the rare examples of a solid solution in a wide concentration regime (up to x = 0.15) persisting down to low temperatures (T = 15 K).

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Section: Phase Diagram Of Ni1−xvxmentioning

confidence: 90%

Section: Pair Distribution Function Analysis Of Ni1−xvxmentioning

confidence: 99%

Study of atomic disorder in Ni-V alloys

Gebretsadik¹,

Wang²,

Alyami³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Additionally, the Ni 3 V (D0 22 ) phase is a critical phase in the dual two-phase intermetallic alloys composed of Ni 3 Al and Ni 3 V, which possessed outstanding mechanical and chemical properties [6][7][8]. However, there is limited information on the Ni-V-Ta ternary system [9,10]. In 1971, Moreen et al [9] investigated the ordering reactions of Ni 8 X (X: V, Ta, Nb) by electrical resistivity and electron diffraction techniques.…”

Section: Introductionmentioning

confidence: 99%

“…However, there is limited information on the Ni-V-Ta ternary system [9,10]. In 1971, Moreen et al [9] investigated the ordering reactions of Ni 8 X (X: V, Ta, Nb) by electrical resistivity and electron diffraction techniques. Then, Gupta [10] reviewed the experimental data of the ternary system.…”

Section: Introductionmentioning

confidence: 99%

Phase Equilibria in the Ni-V-Ta Ternary System

Wang

Liang

Yang

et al. 2018

Metals

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Two isothermal sections of the Ni-V-Ta ternary system at 1200 °C and 1000 °C have been experimentally established using X-ray diffraction, electron probe microanalysis, energy dispersive spectroscopy, and differential scanning calorimeter with equilibrated key alloys. The equilibrium composition of each phase is measured by electron probe microanalysis and energy dispersive spectroscopy. The results indicate that: (1) nine three-phase and eight three-phase regions were confirmed in the isothermal section at 1200 °C and 1000 °C, respectively; (2) the C14 phase with a large solubility of about 51.2 at. % Ni was observed at 1200 °C, while it forms a single-phase region at 1000 °C; (3) a small liquid region was confirmed at 1200 °C, but disappeared at 1000 °C.

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“…solid solutions, respectively. However, some superstructures have not, been given a special name and the prototype is generally specified: Pt,Mo (Ni,V, Ni,Cr, Ni,Mo), Ni,A1 [lS], Ni,Nb (Ni,V, Ni,Ta [17]). Order is more perfect for simple compositions (AB, AB,, AB,, AB,, etc.…”

Section: Introduction Notafionmentioning

confidence: 99%

Order-Disorder Transitions in Substitutional Solid Solutions

Reynaud

1982

phys. stat. sol. (a)

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Ni8X phases in the systems Ni-V, Ni-V-Nb, and Ni-V-Ta

Cited by 13 publications

References 3 publications

Study of atomic disorder in Ni-V alloys

Study of atomic disorder in Ni-V alloys

Phase Equilibria in the Ni-V-Ta Ternary System

Order-Disorder Transitions in Substitutional Solid Solutions

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