Reversible structural transition in monocrystalline Ni2FeGa microwires for shape-memory applications

被引：4

作者：

Frolova, L. ^{[1
]}

Ryba, T. ^{[2
]}

Gamcova, J. ^{[3
,4
]}

Milkovic, O. ^{[3
,5
]}

Diko, P. ^{[5
]}

Kavecansky, V. ^{[5
]}

Kravcak, J. ^{[6
]}

Vargova, Z. ^{[7
]}

Varga, R. ^{[1
,2
]}

机构：

[1] UPJS, CPM TIP, Kosice 04154, Slovakia

[2] RVmagnetics, Hodkovce 21, Hodkovce 04421, Slovakia

[3] Slovak Acad Sci, Inst Mat Res, Watsonova 47, Kosice 04001, Slovakia

[4] Tech Univ Kosice, Inst Mat & Qual Engn, Fac Mat Met & Recycling, Letna 9, Kosice 04200, Slovakia

[5] Slovak Acad Sci, Inst Expt Phys, Watsonova 47, Kosice 04001, Slovakia

[6] Tech Univ Kosice, Dept Phys, FEEI, Pk Komenskeho 2, Kosice 04200, Slovakia

[7] UPJS, Dept Inorgan Chem, Fac Sci, Moyzesova 11, Kosice 04154, Slovakia

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2021年 / 263卷

关键词：

Shape-memory alloys; Glass-coated microwires; Monocrystalline structure; SMART actuators; MAGNETIC-BEHAVIOR; TRANSFORMATIONS; DESIGN; GIANT;

D O I：

10.1016/j.mseb.2020.114891

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the production and characterization of Heusler-based Ni2FeGa microwires exhibiting two - way shape memory effect. The microwires are characterized by a monocrystalline structure with a strong preferred crystallographic orientation that shows [1 1 1] axis parallel to the wire's axis for high-temperature L2(1) austenite phase, while the [0 1 7] axis is preferred for low-temperature monoclinic phase. Variation of crystallographic axis (and corresponding easy magnetization axis) leads to 1600% variation of magnetic permeability due to a 2% strain in axial direction. Such straining is reversible immediately after production without the necessity of further thermal treatment. These properties give the microwire function of very sensitive SMART actuators that can be easily produced in a large amount.

引用

页数：6

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