Zero thermal expansion in non-stoichiometric and single-phase (Hf,Nb)Fe2.5 alloy

Xuyu Dong; Kun Lin; Chengyi Yu; Wenbin Zhang; Wenjie Li; Qian Zhang; Qiang Zhang; Jue Liu; Yili Cao; Xianran Xing

doi:10.1016/j.scriptamat.2023.115388

Zero thermal expansion in non-stoichiometric and single-phase (Hf_,Nb)Fe_2.5 alloy

Xuyu Dong, Kun Lin, Chengyi Yu, Wenbin Zhang, Wenjie Li, Qian Zhang, Qiang Zhang, Jue Liu, Yili Cao, Xianran Xing

Powder Diffraction

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

5 Scopus citations

Abstract

Zero thermal expansion (ZTE) alloys are dimensionally stable under the influence of heat, which is critical in high-precision components but remains rare among single phase materials. This work reports a single phase and nearly isotropic ZTE alloy (Hf_0.8Nb_0.2)Fe_2.5 over a wide temperature range of 5–460 K (α_l ≈1.07 × 10⁻⁶ K⁻¹) via non-stoichiometric regulation. The introduction of excess Fe breaks the dual-phase nature of parent alloy, extends the magnetic ordering temperature, and induces a spin reorientation. The evolution of magnetic structure versus temperature gives rise to the ZTE behavior. The design concept of changing the internal magnetic interaction through non-stoichiometric regulation provides support for the discovery of novel ZTE materials.

Original language	English
Article number	115388
Journal	Scripta Materialia
Volume	229
DOIs	https://doi.org/10.1016/j.scriptamat.2023.115388
State	Published - May 2023

Funding

This research was supported by National Key R&D Program of China (Grant No. 2020YFA0406202); National Natural Science Foundation of China (Grant No. 22090042 , 21971009 ); and the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-IDRY-GD21–03 ). The neutron powder diffraction experiments were performed at the wombat of ANSTO, Australia (Proposal No. P9189, P7341). A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory (Proposal No. 28239 , 26722 , 24707 ). This research was supported by National Key R&D Program of China (Grant No. 2020YFA0406202); National Natural Science Foundation of China (Grant No. 22090042, 21971009); and the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-IDRY-GD21–03). The neutron powder diffraction experiments were performed at the wombat of ANSTO, Australia (Proposal No. P9189, P7341). A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory (Proposal No. 28239, 26722, 24707).

Keywords

Laves phases
Magnetic structure
Spin reorientation
Zero thermal expansion

Access to Document

10.1016/j.scriptamat.2023.115388

Cite this

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title = "Zero thermal expansion in non-stoichiometric and single-phase (Hf,Nb)Fe2.5 alloy",

abstract = "Zero thermal expansion (ZTE) alloys are dimensionally stable under the influence of heat, which is critical in high-precision components but remains rare among single phase materials. This work reports a single phase and nearly isotropic ZTE alloy (Hf0.8Nb0.2)Fe2.5 over a wide temperature range of 5–460 K (αl ≈1.07 × 10−6 K−1) via non-stoichiometric regulation. The introduction of excess Fe breaks the dual-phase nature of parent alloy, extends the magnetic ordering temperature, and induces a spin reorientation. The evolution of magnetic structure versus temperature gives rise to the ZTE behavior. The design concept of changing the internal magnetic interaction through non-stoichiometric regulation provides support for the discovery of novel ZTE materials.",

keywords = "Laves phases, Magnetic structure, Spin reorientation, Zero thermal expansion",

author = "Xuyu Dong and Kun Lin and Chengyi Yu and Wenbin Zhang and Wenjie Li and Qian Zhang and Qiang Zhang and Jue Liu and Yili Cao and Xianran Xing",

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AU - Dong, Xuyu

AU - Lin, Kun

AU - Yu, Chengyi

AU - Zhang, Wenbin

AU - Li, Wenjie

AU - Zhang, Qian

AU - Zhang, Qiang

AU - Liu, Jue

AU - Cao, Yili

AU - Xing, Xianran

PY - 2023/5

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AB - Zero thermal expansion (ZTE) alloys are dimensionally stable under the influence of heat, which is critical in high-precision components but remains rare among single phase materials. This work reports a single phase and nearly isotropic ZTE alloy (Hf0.8Nb0.2)Fe2.5 over a wide temperature range of 5–460 K (αl ≈1.07 × 10−6 K−1) via non-stoichiometric regulation. The introduction of excess Fe breaks the dual-phase nature of parent alloy, extends the magnetic ordering temperature, and induces a spin reorientation. The evolution of magnetic structure versus temperature gives rise to the ZTE behavior. The design concept of changing the internal magnetic interaction through non-stoichiometric regulation provides support for the discovery of novel ZTE materials.

KW - Laves phases

KW - Magnetic structure

KW - Spin reorientation

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