Article
Nanoscience & Nanotechnology
T. Liu, Y. Dong, D. Y. Qin, H. Y. Wu, X. H. Gao, L. X. Du
Summary: The effect of rolling temperature on the incomplete recrystallization behavior and mechanical properties was investigated in the experimental steel. The microstructure analysis revealed that decreasing the hot rolling temperature led to a change in grain structure from uniform equiaxed grains to heterogeneous microstructures. The mechanical tests showed that the steel rolled at 800°C exhibited excellent mechanical properties, attributed to the high austenite content and thorough cementite dissolution in the heterogeneous microstructure. The enhanced low-temperature toughness and improved tensile strength and elongation were observed in the steel with the heterogeneous microstructure.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Sudipta Mohapatra, Karabi Das, Siddhartha Das
Summary: The influence of annealing time on the microstructure, mechanical properties, and mechanical stability of a thermo-mechanically processed medium-Mn steel is reported. The specimen annealed at 750 degrees C for 60 min exhibits better tensile properties due to higher austenite fraction, higher transformation ratio of austenite, and optimum recrystallized fraction. Additionally, the lower mechanical stability of austenite enhances the ductility of the 60 min annealed specimen.
Article
Chemistry, Physical
Hang Li, Dongtao Niu, Zhongtao Zhang, Fan Yang, Hongxia Wang, Weili Cheng
Summary: This study presents a simple and innovative approach for producing one-dimensional Mn5Si3 nanorods through a casting-extraction process. The Mn5Si3 nanorods were synthesized by reacting Mn and Si during brass solidification and extracted by electrochemical etching of the brass matrix. The prepared Mn5Si3 nanorods had a single-crystal D8(8) structure and exhibited ferromagnetism at room temperature. Increasing the cooling rate lead to a decrease in the dimension of the nanorods but an increase in their ferromagnetism. The fabricated Mn5Si3 nanorods with optimal cooling rate showed potential for magnetic storage applications.
Article
Materials Science, Multidisciplinary
Tai-Hsiang Liu, Fei-Yi Hung, Cheng-Hung Chen, Kuan-Jen Chen
Summary: In this study, CuO, ZnO, and CZO powders were synthesized through the aqueous solution method. The influence of different proportions of Cu and Zn doping on the photoelectromagnetic properties of CZO powder was analyzed. Direct synthesis was found to be the most effective process, with CZO exhibiting the best electromagnetic properties when Cu:Zn ratio was close to 1:1.
Article
Chemistry, Physical
Xiaokai Liang, Hang Fu, Mei Cui, Gang Liu
Summary: The effect of intercritical tempering temperature on the microstructure evolution and mechanical properties of medium manganese steel was investigated. The volume fraction of reversed austenite increased and then decreased with increasing tempering temperature. Lath-like reversed austenite improved toughness and plasticity, while block reversed austenite had a slight negative effect on them.
Article
Engineering, Chemical
Veerendra Singh, Samik Nag, N. Gurulaxmi Srikakulapu, Asim K. Mukherjee
Summary: This study developed a novel magnetic separator that uses alternating magnetic field to exploit differences in the electromagnetic properties of minerals. A mathematical model was created to simulate mineral particle trajectories under varying magnetic field intensities and rotation speeds. The designed magnetic separator showed improved separation efficiency and selectivity for ferruginous manganese ores. The results suggest the potential for the application of this magnetic separator in other multi-magnetic mineral materials.
MINERALS ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Jingang Guo, Yule Li, Junfeng Li, Hui Zhang, Qingming Chen
Summary: The study synthesized a series of La0.7-xGdxCa0.3MnO3 polycrystalline ceramics with high temperature coefficient of resistance and magnetoresistive properties using the sol-gel method. The maximum TCR and MR were achieved at doping levels x = 0.03 and x = 0.045, respectively, with improvements of 10% and 30% compared to the base sample. The doping of gadolinium was found to decrease the unit cell volume and improve the magnetoelectric transport properties of the materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Ziqin Yan, Ang Xiao, Peng Zhao, Guang Yang, Shu Wang, Xiaohui Cui
Summary: This paper investigates the effect of hydroforming and electromagnetic hydraulic forming on the formability and hardness of AA5052 sheets. The results show that the yield strength and tensile strength of the electromagnetic hydraulic forming samples are significantly higher than those of the hydroforming samples. Transmission electron microscopy and electron backscatter diffraction reveal that the electromagnetic hydraulic forming samples have higher internal dislocation density, smaller grain size, higher proportion of small-angle grain boundaries, and higher texture intensity.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Huijuan Ma, Wenjie Mao, Ning Zhao, Hui Zhu, Peiliao Wang, Qian Sun, Zhili Hu, Liang Huang, Jianjun Li
Summary: As an emerging technology, electromagnetic forming has a complex effect on the mechanical properties and microstructure evolution of materials. This study investigates the relationship between microstructure evolution and mechanical properties of AA2219-T6 under different discharge energies during electromagnetic ring expansion (EMRE) experiments. The results show that the use of a steel sleeve leads to similar microhardness as AA2219-T6, while the use of an epoxy resin sleeve or EMRE alone results in lower microhardness.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Huanli Ji, Zhihong Li, Min Liu
Summary: This study systematically investigated the coordination of structural and mechanical properties of cBN composites by exploring the effects of cBN particle size distribution and holding time. The composite with mixed particle size gradation of G1 exhibited uniform microstructure and high relative density, leading to excellent mechanical properties. Composite with 110 s holding time demonstrated perfect densification process and properties, providing a theoretical basis for low-cost preparation and applications of cBN composites.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Chemistry, Physical
Roberto Cestaro, Peter Schweizer, Laetitia Philippe, Xavier Maeder, Albert Serra
Summary: In this study, Mn3O4 and Mn2O3 were synthesized through electrodeposition and thermal treatment. The effects of different parameters on the structure and optical properties of manganese oxides were investigated, and it was found that the applied voltage played a key role in controlling the valence state of initial amorphous manganese.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Mingming Yin, He Miao, Ruigan Hu, Zixu Sun, Hong Li
Summary: Oxygen catalytic reactions play a crucial role in energy transformation and storage devices, with manganese dioxide (MnO2) standing out for its high earth-abundance, low cost, and balanced activity-stability performances. Strategies such as heteroatom doping and morphology tuning are implemented to optimize the catalytic performance of MnO2, which finds applications in metal-air batteries, fuel cells, and water splitting systems, showing promising prospects for further development.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Ceramics
Sheng-Jiang Huang, Le-Zhong Li, Xiao-Hui Wu, Jian Tang, Rui Wang, Zhe Xiong, Xin Chang
Summary: Considering the rapid development of wireless communication, there is a growing demand for miniaturization, integration, and high frequency of electronic components. Improving the material properties is crucial for overcoming the challenges in electronic device development. In this study, solid-phase reactions were utilized to create NZCDF ferrite ceramics with dysprosium ion doping. The addition of dysprosium ions led to an increase in lattice constant, bulk density, and magnetic quality factor, as well as a decrease in saturation magnetization.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xinlei Wang, Xiaomeng Fan, Minghang Li, Wenjie Zhu, Jimei Xue, Fang Ye, Laifei Cheng
Summary: This study investigates the impact of microstructure of MAX phases on the structures and electromagnetic absorbing properties of MXenes. It demonstrates that manipulating the structures of MAX phases can regulate the electromagnetic absorption performance of MXene.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Yongjie Pang, Guohui Chao, Tianyang Luan, Shen Gong, Yongru Wang, Zhaohan Jiang, Zhu Xiao, Yanbin Jiang, Zhou Li
Summary: This paper systematically studied the effect of Si on the microstructure and properties of Cu-10Fe alloy. By adding 0.4 wt% Si, significant improvements were observed in mechanical properties, electric conductivity, thermal conductivity, saturation magnetization, and electromagnetic interference shielding effectiveness. The Cu-Fe-Si alloy with high-strength, high-conductivity, and magnetic properties has great application potential in electromagnetic shielding and other fields.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
