A5069272203- Magnetic Properties of Alloys
- Magnetic properties of thin films
- Magnetic Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Rare-earth and actinide compounds
- Metallic Glasses and Amorphous Alloys
- Shape Memory Alloy Transformations
- Superconducting Materials and Applications
- Hydrogen Storage and Materials
- ZnO doping and properties
- Ga2O3 and related materials
- Intermetallics and Advanced Alloy Properties
- Metallurgical Processes and Thermodynamics
- Gas Sensing Nanomaterials and Sensors
- High-Temperature Coating Behaviors
- Analytical Chemistry and Sensors
- Advanced Condensed Matter Physics
- Microstructure and Mechanical Properties of Steels
- Advanced Photocatalysis Techniques
- Magnetic Properties and Synthesis of Ferrites
- Nuclear Materials and Properties
- High Temperature Alloys and Creep
- Surface and Thin Film Phenomena
- Underwater Acoustics Research
- Metallurgy and Material Forming
Ningbo University of Technology
2023-2024
China Iron and Steel Research Institute Group
2007-2019
Magnetic properties and thermal stability were investigated for the MnBi/NdFeB (MnBi = 0, 20, 40, 60, 80, 100 wt.%) bonded hybrid magnets prepared by spark plasma sintering (SPS) technique. Effect of MnBi content on magnetic was studied. With increasing content, coercivity increases rapidly, while remanence maximum energy product drops simultaneously. Thermal measurement magnet, NdFeB magnet with 20 wt.% indicates that both have a negative temperature coefficient coercivity, has positive...
The inter-grain exchange-coupling interactions, effective anisotropy, and coercivity in nanocomposite Nd2Fe14B/α−Fe magnets were investigated. anisotropy of has been calculated starting from the statistics boundaries between magnetically hard-hard, hard-soft, soft-soft grains. result shows that decreases with reduction grain size and/or increase soft phase components. When sizes reduce to 4–5 nm, Keff 1/3−1/4 ordinary value K. demonstrates a similar behavior. decrement is mainly due...
Chemical coating, hot compaction, and deformation techniques have been applied to prepare bulk anisotropic SmCo5/α-Fe nanocomposite magnets. The effects of α-Fe content on the structure magnetic properties magnets were studied. With increase content, both saturation magnetization (Ms) remanence (Mr) rise first, peak at 10 vol. % then fall while coercivity (Hci) drops simultaneously. Crystal analysis shows that exhibit a strong c-axis crystal texture SmCo5 phase, which, however, weakens...
Maxwell relation and mean-field approximation are chosen to estimate the total entropy change magnetic change, respectively. The experimental results exactly consonant with theoretical results. Consequently, changes make up majority of lattice small. giant magnetocaloric effect in MnAs is clarified. According thermodynamics discussion, modulus compression stress at TC decrease dramatically. Therefore, magneto-structural phase transition a kind soft mode.
In the present study, demagnetization curves of MnBi/α-Fe nanocomposite permanent magnets were calculated by micromagnetic finite element method. The effect volume ratio between magnetically soft α-Fe phase and MnBi hard on magnetic properties was investigated. sample used in simulation consisted 91 spherical fourteen faces units grains with diameter 20 nm, matrix thickness (t) ranging from 1 to 6 nm. For isotropic magnets, as increases, remanence (B <sub...
The effects of phase distribution and grain size on the effective anisotropy coercivity exchange-coupled nanocomposite permanent materials have been investigated in this paper. is supposed to be equal statistical average value magnetically soft hard grains. dependence sizes mainly determined by calculated results show that, when phases are identical volume fraction given, decreases with reduction size. For given grains phase, shows a peak as function hard-grain experimental enhancement...
Oxidation has been explained as one possibility for unacceptable and irreversible coercivity loss of 2:17 type SmCo-based magnets at high temperatures over 550 °C, but the question how oxidation affects in magnet not fundamentally answered. In this work, its induced degradation magnetic phases a Sm(CobalFe0.22Cu0.08Zr0.02)7.5 air 600 °C have investigated by using transmission electron microscopy correlated with demagnetization curves measured. It shows that loss, which is significantly...
Abstract Battery‐free photodetection is necessary for underwater optical communication, which poses extremely high requirements in terms of the self‐powering capability photodetectors (PDs) and their ability to operate harsh liquid environments. Emerging photoelectrochemical (PEC) PDs are appealing owing inherent aqueous operation behaviors with highly tunable photoresponses. Herein, a novel self‐powered PEC ultraviolet (UV) PD applicable all‐scenario environments, including seawater at...
In the realm of photodetector (PD) technology, photoelectrochemical (PEC) PDs have garnered attention owing to their inherent advantages. Advances in this field depend on functional nanostructured materials, which are pivotal improving separation and transport photogenerated electron-hole pairs improve device efficiency. Herein, a highly photosensitive PEC UV PD is built using integrated self-supporting SiC/ZnS heterojunction nanowire array photoelectrodes through anodization chemical...