Elastocaloric effect in a Co50Ni20Ga3 single crystal
Elastocaloric effect in a Co50Ni20Ga3 single crystal
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Co50Ni20Ga3 单晶的弹热效应
DOI：
10.1016/j.scriptamat.2016.08.030
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发表时间：
2017
影响因子：
6
通讯作者：
Li Caiju
中科院分区：
文献类型：
--
作者：
Shen Ao;Zhao Dewei;Sun Wen;Liu Jian;Li Caiju
本文研究了Co_（50）Ni_（20）Ga_（30）单晶的弹热效应。在291 K下去除150 MPa的单轴应力时，观察到− 6 K的局部绝热温度变化（ΔT）。红外热像测量揭示了马氏体带和温度映射的相关响应。在100次循环试验中，弹性热效应和超弹性效应均表现出良好的可逆性。基于Clausius-Clapeyron方程分析了临界应力随温度的变化关系，实验得到的Δ T值与理论值吻合较好。
Elastocaloric effect for a Co50Ni20Ga30single crystal has been investigated. A local adiabatic temperature change (ΔT) of − 6 K was observed on the removal of a uniaxial stress of 150 MPa at 291 K. Infrared thermography measurement reveal a correlated response of martensitic bands and temperature mapping. Both elastocaloric effect and superelasticity exhibit a good reversibility in the 100 times of cycling test. The experimentally obtained ΔTvalue agrees well with the theoretical one by analyzing the temperature dependence of critical stress based on the Clausius-Clapeyron equation.