The equation of state(EOS)of Cr3C2 at high pressure is studied by the synchrotron radiation x-ray diffraction(XRD)in a diamond anvil cell(DAC)at ambient temperature,and density functional theory(DFT).The XRD analysis ...The equation of state(EOS)of Cr3C2 at high pressure is studied by the synchrotron radiation x-ray diffraction(XRD)in a diamond anvil cell(DAC)at ambient temperature,and density functional theory(DFT).The XRD analysis shows that the orthorhombic structure is maintained to a maximum pressure of 44.5 GPa.The XRD data show that the bulk modulus is K0=292(18)GPa with K0'=3.25(0.85).In addition,the high-pressure compression behavior of Cr3C2 is studied by first principles calculations.The obtained bulk modulus of Cr3C2 is 323(1)GPa.展开更多
This article reviews the research progress of measurement techniques and materials on the mechanocaloric effect over the past few decades.Mechanocaloric materials can be divided into elastocaloric and barocaloric mate...This article reviews the research progress of measurement techniques and materials on the mechanocaloric effect over the past few decades.Mechanocaloric materials can be divided into elastocaloric and barocaloric materials depending on the applied uniaxial stress or hydrostatic pressure.Elastocaloric materials include non-magnetic shape memory alloys,polymers,and rare-earth compounds.Barocaloric materials include magnetic shape memory alloys,ferroelectric ceramics,superionic conductors,and oxyfluorides.The mechanocaloric effects of these classes of materials are systematically compared in terms of the isothermal entropy change and adiabatic temperature change.In addition to the thermal effects,other characteristics closely related to the application of mechanocaloric materials are also summarized.Finally,perspectives for further development of mechanocaloric materials in the solid-state cooling area are discussed.展开更多
基金the Project of Ph.D.Special Research of Sichuan University of Arts and Science,China(Grant No.2019BS006Z)the Fund from the Chinese Academy of Sciences(Grant Nos.KJCX2-SW-N03 and KJCX2-SW-N20).
文摘The equation of state(EOS)of Cr3C2 at high pressure is studied by the synchrotron radiation x-ray diffraction(XRD)in a diamond anvil cell(DAC)at ambient temperature,and density functional theory(DFT).The XRD analysis shows that the orthorhombic structure is maintained to a maximum pressure of 44.5 GPa.The XRD data show that the bulk modulus is K0=292(18)GPa with K0'=3.25(0.85).In addition,the high-pressure compression behavior of Cr3C2 is studied by first principles calculations.The obtained bulk modulus of Cr3C2 is 323(1)GPa.
基金Project supported by the National Natural Science Foundation of China(Grant No.11474280).
文摘This article reviews the research progress of measurement techniques and materials on the mechanocaloric effect over the past few decades.Mechanocaloric materials can be divided into elastocaloric and barocaloric materials depending on the applied uniaxial stress or hydrostatic pressure.Elastocaloric materials include non-magnetic shape memory alloys,polymers,and rare-earth compounds.Barocaloric materials include magnetic shape memory alloys,ferroelectric ceramics,superionic conductors,and oxyfluorides.The mechanocaloric effects of these classes of materials are systematically compared in terms of the isothermal entropy change and adiabatic temperature change.In addition to the thermal effects,other characteristics closely related to the application of mechanocaloric materials are also summarized.Finally,perspectives for further development of mechanocaloric materials in the solid-state cooling area are discussed.
