Large superelasticity above 800K in a Ni-Mn-Ga-B-Ce high-temperature shape memory microwire

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-06-19 DOI:10.1016/j.scriptamat.2025.116827

Zhen Chen , Zhehao Jia , Yin Zhang , Weiran Zhang , Liying Sun , Daoyong Cong

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引用次数: 0

Abstract

With the rapid development of aerospace, automotive, energy exploration, and mechanotronics, higher requirements are put forward for high-temperature shape memory alloys (HTSMAs) as solid-state actuators or superelastic components. Here, we developed a Ni-Mn-Ga-B-Ce HTSMA microwire with an oligocrystalline structure fabricated by Taylor-Ulitovsky method, exhibiting large tensile superelasticity with a recoverable strain up to 9.2 % at 803 K, which is the highest superelastic temperature under tension reported up to now. Owing to the existence of a face-centered cubic (FCC) structured precipitation and a semi-coherent interface between FCC and NM martensite phases, as well as the microstructure of oligocrystalline, the microwire showed excellent superelasticity from 623 K to 803 K. Meanwhile, the microwire also showed excellent cyclic stability during 601 cycles of loading and unloading at 673 K. Combined with easy-fabricated and low cost of raw materials, the microwire shows a high potential in the field of high-temperature actuation and sensing.

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Ni-Mn-Ga-B-Ce高温形状记忆微丝800K以上大超弹性

随着航空航天、汽车、能源勘探、机电一体化等领域的快速发展，对高温形状记忆合金作为固态致动器或超弹性元件提出了更高的要求。本文采用Taylor-Ulitovsky方法制备了一种寡晶结构的Ni-Mn-Ga-B-Ce HTSMA微丝，该微丝在803 K时具有较大的拉伸超弹性，可恢复应变高达9.2%，这是迄今为止报道的拉伸下最高的超弹性温度。由于面心立方（FCC）结构的析出和FCC与NM马氏体相之间的半相干界面以及低晶组织的存在，使得微丝在623 ~ 803 K范围内表现出优异的超弹性。同时，在673 K的加载和卸载过程中，微丝也表现出了良好的循环稳定性。由于制备简单、原材料成本低，在高温驱动和传感领域显示出很大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.