Microstructure and giant baro-caloric effect induced by low pressure in Heusler Co51Fe1V33Ga15 alloy undergoing martensitic transformation
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2021年第14期
论文作者：Kai Liu Hai Zeng Ji Qi Xiaohua Luo Xuanwei Zhao Xianming Zheng Yuan Yuan Changcai Chen Shengcan Ma Ren Xie Bing Li Zhenchen Zhong
摘 要：Solid-state refrigeration based on the magneto-or mechano-caloric effect,including elasto-and barocaloric in ferroic phase transition materials is promising to replace the current vapor compression refrigeration in consideration of environmental-friendliness and energy-saving.However,both high driven field and small thermal changes in all of these caloric materials hinder the development of solid-state refrigeration.Here we report a giant baro-caloric effect near room temperature induced by a low hydrostatic pressure in Co-based Co51Fe1 V33Ga15 Heusler alloy.The maximum adiabatic temperature change under the applied pressure change of Δp=0.1-100 MPa can be as high as ΔTadMax=7.7 K(ΔTadMax/Δpreaches up to ～7.7 K kbar-1),surpassing the ΔTadMax/Δpvalue reported hitherto in baro-caloric alloys.In addition,the microstructure is also studied by using the electron microscopes.Along with the austenite and martensite,the submicron V-rich particles are precipitated in this alloy,which are believed to account for enhancing mechanical properties.
Kai Liu1,2,3，Hai Zeng1,2，Ji Qi4,5，Xiaohua Luo1，Xuanwei Zhao1,2，Xianming Zheng1,2，Yuan Yuan1,2，Changcai Chen1，Shengcan Ma1，Ren Xie6，Bing Li7,5，Zhenchen Zhong1
1. Jiangxi Key Laboratory for Rare Earth Magnetic Materials and Devices/Institute for Rare Earth Magnetic Materials and Devices (IREMMD), College of Rare Earths, Jiangxi University of Science and Technology2. School of Materials Science and Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology3. Henan Key Laboratory of Photovoltaic Materials and School of Physics & Electronics, Henan University4. Shenyang National Laboratory (SYNL) for Materials Science, Institute of Metal Research, Chinese Academy of Sciences5. School of Materials Science and Engineering, University of Science and Technology of China6. Guizhou Province Key Laboratory for Photoelectrics Technology and Application, College of Physics, Guizhou University7. Shenyang National Laboratory (SYNL)% for Materials Science, Institute of Metal Research, Chinese Academy of Sciences
摘 要：Solid-state refrigeration based on the magneto-or mechano-caloric effect,including elasto-and barocaloric in ferroic phase transition materials is promising to replace the current vapor compression refrigeration in consideration of environmental-friendliness and energy-saving.However,both high driven field and small thermal changes in all of these caloric materials hinder the development of solid-state refrigeration.Here we report a giant baro-caloric effect near room temperature induced by a low hydrostatic pressure in Co-based Co51Fe1 V33Ga15 Heusler alloy.The maximum adiabatic temperature change under the applied pressure change of Δp=0.1-100 MPa can be as high as ΔTadMax=7.7 K(ΔTadMax/Δpreaches up to ～7.7 K kbar-1),surpassing the ΔTadMax/Δpvalue reported hitherto in baro-caloric alloys.In addition,the microstructure is also studied by using the electron microscopes.Along with the austenite and martensite,the submicron V-rich particles are precipitated in this alloy,which are believed to account for enhancing mechanical properties.
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