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Chen Angkang Li Chonggui Zhang Chaomin Li Wenyao Yang Qi 《Journal of Solid State Electrochemistry》2022,26(3):729-738
Journal of Solid State Electrochemistry - Currently, lithium-ion batteries are widely used in many areas, but they are still limited by the lower cycle stability and energy density. The development... 相似文献
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Effects of the magnetoelectric coupling between the frustrated antiferromagnetic and ferroelectric ordering in hexagonal ferroelectromagnet are investigated by the soft-mode theory and molecular-field approximation. Applying the Heisenberg model for frustrated triangular antiferromagnets with exchange anisotropy and Diffour model for ferroelectric interaction, we discuss thermodynamic properties of the hexagonal ferroelectromagnetic system, including mean magnetization 〈si〉, polarization p, magnetization susceptibility χm, and polarization susceptibility χp, in a possible coupling form related to a combination of electric polarization and spin correlation. It is found that polarization induced by magnetic coupling leads to an anomaly in χp and a cusp in χm at low-temperature, which is consistent qualitatively with experimental results in hexagonal ferroelectromagnet YMnO3. 相似文献
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Hua Yan Peilei Zhang Zhishui Yu Chonggui Li Ruidi Li 《Optics & Laser Technology》2012,44(5):1351-1358
To improve the wear resistance of copper components, laser surface cladding (LSC) was applied to deposit (Ti,W)C reinforced Ni–30Cu alloy composite coating on copper using a cladding interlayer of Ni–30Cu alloy by Nd:YAG laser. The microstructure and phases of the composite coating were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray energy dispersive microanalysis (EDX). Microhardness tester and pin-on-disc wear tester were employed to evaluate the hardness and dry-sliding wear resistance. The results show that crack-free composite coating with metallurgical bonding to the copper substrate is obtained. Phases identified in the (Ti,W)C-reinforced Ni–30Cu alloy composite layer are composed of TiWC2 reinforcements and (Ni,Cu) solid solution. TiWC2 reinforcements are distributed uniformly in the (Ni,Cu) solid solution matrix with dendritic morphology in the upper region and with particles in the mid-lower region. The microhardness and wear properties of the composite coating are improved significantly in comparison to the as-received copper substrate due to the addition of 50 wt% (Ti,W)C multicarbides. 相似文献
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