Large elastocaloric effect covering a broad temperature window in a composition-graded Ni50Mn31.5Ti18.5 alloy prepared by magnetic field-assisted directional solidification

材料科学 合金 窗口(计算) 定向凝固 磁场 磁铁 冶金 复合材料 机械工程 计算机科学 量子力学 操作系统 物理 工程类
作者
Honglin Wang,Zongbin Li,Long Hou,Li Xi,Haile Yan,Bo Yang,Liang Zuo
出处
期刊:Acta Materialia [Elsevier BV]
卷期号:274: 120020-120020 被引量:15
标识
DOI:10.1016/j.actamat.2024.120020
摘要

Elastocaloric effect in shape memory alloys relies on the latent heat associated with stress-induced martensitic transformation, which can be exploited for solid-state cooling applications. However, large stress hysteresis inherent to the first-order transformation greatly restricts the energy conversion efficiency and working temperature window. Here, by utilizing compositional gradient engineering to tailor mechanical hysteresis and microstructure texturing to promote elastocaloric response, a composition-graded Ni50Mn31.5Ti18.5 alloy with <001>A preferred orientation has been fabricated through magnetic field-assisted directional solidification. Owing to the composition segregation induced by a transverse magnetic field applied during solidification, considerable amounts of preexisting martensite domains are embedded in the austenite matrix, which contributes to the reduced critical driving stress and stress hysteresis of martensitic transformation. In combination with large cooling capacity favored by highly preferred orientation, the material's coefficient of performance has been greatly improved. Moreover, a broad refrigeration temperature span of 200 K covering 263 K to 463 K is also realized, with a maximum adiabatic temperature variation of –18.4 K. We attribute the enhanced elastocaloric properties to the synergy of preferred orientation and compositional gradient, which can be developed as an effective route towards performance improvement of elastocaloric materials.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
欢呼妙菱发布了新的文献求助10
1秒前
王俊凯完成签到 ,获得积分10
1秒前
可可发布了新的文献求助10
1秒前
爱学习的GGbond完成签到,获得积分10
1秒前
王院士发布了新的文献求助10
2秒前
花痴的翠容完成签到,获得积分10
2秒前
nanyuan123完成签到,获得积分10
2秒前
2秒前
李爱国应助阿威啊威采纳,获得10
2秒前
彭于彦祖应助djbj2022采纳,获得30
3秒前
请假了发布了新的文献求助10
3秒前
564654SDA完成签到,获得积分10
3秒前
Han发布了新的文献求助10
3秒前
3秒前
sganthem完成签到,获得积分10
4秒前
4秒前
冷酷孤风完成签到,获得积分10
4秒前
nwds发布了新的文献求助10
5秒前
5秒前
5秒前
慕青应助丰富的妙柏采纳,获得20
5秒前
5秒前
6秒前
深情安青应助科研通管家采纳,获得10
6秒前
哈哈发布了新的文献求助10
6秒前
6秒前
6秒前
情怀应助科研通管家采纳,获得10
6秒前
思源应助科研通管家采纳,获得10
6秒前
传奇3应助科研通管家采纳,获得10
6秒前
小马甲应助科研通管家采纳,获得30
6秒前
充电宝应助科研通管家采纳,获得10
6秒前
dypdyp应助科研通管家采纳,获得10
6秒前
天天快乐应助科研通管家采纳,获得10
6秒前
7秒前
大壮应助科研通管家采纳,获得10
7秒前
7秒前
7秒前
ll应助科研通管家采纳,获得10
7秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Cognitive Neuroscience: The Biology of the Mind 1000
Technical Brochure TB 814: LPIT applications in HV gas insulated switchgear 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Picture Books with Same-sex Parented Families: Unintentional Censorship 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3969335
求助须知:如何正确求助?哪些是违规求助? 3514162
关于积分的说明 11172430
捐赠科研通 3249456
什么是DOI,文献DOI怎么找? 1794853
邀请新用户注册赠送积分活动 875437
科研通“疑难数据库(出版商)”最低求助积分说明 804809