A new thermodynamically stable Nb2Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system

J. F. Zhao; H. P. Wang; B. Wei

doi:10.1016/j.jmst.2021.07.001

A new thermodynamically stable Nb₂Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system

J. F. Zhao, H. P. Wang, B. Wei

School of Physical Science and Technology

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

A new intermetallic compound of thermodynamically stable Nb₂Ni phase is discovered within Nb-Ni binary system, refreshing the current situation that there are only three stable intermediate phases of Nb₇Ni₆, NbNi₃ and NbNi₈. The new stable phase is generated from the peritectoid transition: (Nb) + Nb₇Ni₆ → Nb₂Ni, and the transformation temperature is 1533 K. This refreshes the current equilibrium Nb-Ni binary phase diagram. It is confirmed by transmission electron microscopy and the annealing experiments, which is determined to be the FCC structure (Pearson: cF96, space grope: Fd-3m O2, a = 11.888 Å). Furthermore, the equilibrium properties of Nb₂Ni phase are produced by density functional theory, including the formation energy, cohesive energy, bulk modulus and lattice constant.

Original language	English
Pages (from-to)	246-253
Number of pages	8
Journal	Journal of Materials Science and Technology
Volume	100
DOIs	https://doi.org/10.1016/j.jmst.2021.07.001
State	Published - 20 Feb 2022

Keywords

Density functional theory
Intermetallic compound
Nb alloy
Peritectoid transition
Transmission electron microscopy

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10.1016/j.jmst.2021.07.001

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title = "A new thermodynamically stable Nb2Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system",

abstract = "A new intermetallic compound of thermodynamically stable Nb2Ni phase is discovered within Nb-Ni binary system, refreshing the current situation that there are only three stable intermediate phases of Nb7Ni6, NbNi3 and NbNi8. The new stable phase is generated from the peritectoid transition: (Nb) + Nb7Ni6 → Nb2Ni, and the transformation temperature is 1533 K. This refreshes the current equilibrium Nb-Ni binary phase diagram. It is confirmed by transmission electron microscopy and the annealing experiments, which is determined to be the FCC structure (Pearson: cF96, space grope: Fd-3m O2, a = 11.888 {\AA}). Furthermore, the equilibrium properties of Nb2Ni phase are produced by density functional theory, including the formation energy, cohesive energy, bulk modulus and lattice constant.",

keywords = "Density functional theory, Intermetallic compound, Nb alloy, Peritectoid transition, Transmission electron microscopy",

author = "Zhao, {J. F.} and Wang, {H. P.} and B. Wei",

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year = "2022",

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doi = "10.1016/j.jmst.2021.07.001",

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AU - Zhao, J. F.

AU - Wang, H. P.

AU - Wei, B.

PY - 2022/2/20

Y1 - 2022/2/20

N2 - A new intermetallic compound of thermodynamically stable Nb2Ni phase is discovered within Nb-Ni binary system, refreshing the current situation that there are only three stable intermediate phases of Nb7Ni6, NbNi3 and NbNi8. The new stable phase is generated from the peritectoid transition: (Nb) + Nb7Ni6 → Nb2Ni, and the transformation temperature is 1533 K. This refreshes the current equilibrium Nb-Ni binary phase diagram. It is confirmed by transmission electron microscopy and the annealing experiments, which is determined to be the FCC structure (Pearson: cF96, space grope: Fd-3m O2, a = 11.888 Å). Furthermore, the equilibrium properties of Nb2Ni phase are produced by density functional theory, including the formation energy, cohesive energy, bulk modulus and lattice constant.

AB - A new intermetallic compound of thermodynamically stable Nb2Ni phase is discovered within Nb-Ni binary system, refreshing the current situation that there are only three stable intermediate phases of Nb7Ni6, NbNi3 and NbNi8. The new stable phase is generated from the peritectoid transition: (Nb) + Nb7Ni6 → Nb2Ni, and the transformation temperature is 1533 K. This refreshes the current equilibrium Nb-Ni binary phase diagram. It is confirmed by transmission electron microscopy and the annealing experiments, which is determined to be the FCC structure (Pearson: cF96, space grope: Fd-3m O2, a = 11.888 Å). Furthermore, the equilibrium properties of Nb2Ni phase are produced by density functional theory, including the formation energy, cohesive energy, bulk modulus and lattice constant.

KW - Density functional theory

KW - Intermetallic compound

KW - Nb alloy

KW - Peritectoid transition

KW - Transmission electron microscopy

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DO - 10.1016/j.jmst.2021.07.001

M3 - 文章

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SN - 1005-0302

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JO - Journal of Materials Science and Technology

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ER -

A new thermodynamically stable Nb₂Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system

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Keywords

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