Co50Fe2V32Ga16 Heusler合金的马氏体相变及其压卡效应研究

曲靖师范学院学报 ›› 2021, Vol. 40 ›› Issue (6): 1-5.

• 物理学研究 • 下一篇

Co₅₀Fe₂V₃₂Ga₁₆ Heusler合金的马氏体相变及其压卡效应研究

李哲¹, 李勇¹, 高红艳², 刘宏伟³

1.曲靖师范学院物理与电子工程学院,云南曲靖 655011;
2.曲靖师范学院化学与环境科学学院,云南曲靖 655011;
3.东北大学材料科学与工程学院,辽宁沈阳 110819

收稿日期:2021-10-10 出版日期:2021-11-26 发布日期:2021-12-10
作者简介:李哲,曲靖师范学院物理与电子工程学院(磁性材料及器件研究中心)教授,主要从事相变材料的功能效应研究.
基金资助:
云南省应用基础研究计划重点项目“一级磁共结构马氏体相变合金在室温下的压卡性能研究”(2018FA031).

Study of Martensitic Transformation and Barocaloric Effect of Co₅₀Fe₂V₃₂Ga₁₆ Heusler Alloy

LI Zhe¹, LI Yong¹, GAO Hongyan², LIU Hongwei³

1. School of Physics and Electronic Engineering, Qujing Normal University, Qujing Yunnan 655011;
2. School of Chemistry and Environmental Sciences, Qujing Normal University, Qujing Yunnan 655011;
3. School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China

Received:2021-10-10 Published:2021-11-26 Online:2021-12-10

摘要/Abstract

摘要： 利用电弧熔炼法制备了Co₅₀Fe₂V₃₂Ga₁₆四元Heusler合金,通过X射线粉末衍射仪、振动样品磁强计和配备高压氮气发生器的差示扫描量热仪,系统研究了该样品的晶体结构、马氏体相变特征和不同等静压下的热力学性质.实验结果表明,该样品在近室温下的马氏体相变发生在类顺磁态,且奥氏体与马氏体相之间存在较大的体积差异.正因如此,在外加1 kbar的等静压下,样品在近室温下的等温熵变(ΔS_T)和绝热温变(ΔT_ad)分别达到了-21 J/kg K和2.5 K,其性能优于之前所报道的诸多压卡材料,展现出在固态制冷技术上的潜在应用前景.

关键词: Heusler合金, 马氏体相变, 压卡效应

Abstract: A Co₅₀Fe₂V₃₂Ga₁₆ quaternary Heusler alloy has been fabricated by means of arc-melting approach. The crystal structure, martensitic transformation feature and thermodynamical properties at different hydrostatic pressure of the studied sample have been investigated by using X-ray powder diffractometer, vibrating sample magnetometer and differential scanning calorimeter equipped with high-pressure nitrogen generator. The experimental results indicate that the martensitic transformation near room temperature of this sample occurs at paramagnetic-like state, and there exists a relatively large volume difference between austenitic and martensitic phases. Due to this, when the hydrostatic pressure of 1 kbar is applied, both the isothermal entropy change (ΔS_T) and the adiabatic temperature change (ΔT_ad) of the studied sample achieve-21 J/kg K and 2.5 K respectively, which are superior to those previously reported in many barrocaloric materials, performing a potential application prospect for solid-state refrigeration technique.

Key words: Heusler alloy, Martensitic transformation, Barocaloric effect

中图分类号:

O469

李哲, 李勇, 高红艳, 刘宏伟. Co₅₀Fe₂V₃₂Ga₁₆ Heusler合金的马氏体相变及其压卡效应研究[J]. 曲靖师范学院学报, 2021, 40(6): 1-5.

LI Zhe, LI Yong, GAO Hongyan, LIU Hongwei. Study of Martensitic Transformation and Barocaloric Effect of Co₅₀Fe₂V₃₂Ga₁₆ Heusler Alloy[J]. Journal of Qujing Normal University, 2021, 40(6): 1-5.

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Co₅₀Fe₂V₃₂Ga₁₆ Heusler合金的马氏体相变及其压卡效应研究

Study of Martensitic Transformation and Barocaloric Effect of Co₅₀Fe₂V₃₂Ga₁₆ Heusler Alloy

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