Article
Engineering, Electrical & Electronic
Zhigao Zhang, Zhiyi Xu, Jian He, Jun Lu
Summary: Vibrating sample magnetometers (VSMs) are widely used for characterizing industrial magnetic materials. This study developed a calibration method for VSMs using current-carrying microcoils to generate a tunable magnetic moment. The method allows for wide range calibration without dependence on the magnetic field and materials.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Pasquale Arpaia, Marco Buzio, Alessandro Parrella, Mariano Pentella, Pedro M. Ramos
Summary: This article presents a static-sample magnetometer method for measuring the relative permeability of weakly magnetic materials by scanning the magnetic field inside a dipole magnet and using an NMR teslameter. The method was validated by measuring three different materials and showed an expanded measurement uncertainty of about 10(-4) with a 95% confidence level.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Materials Science, Multidisciplinary
Meng Lv, Mingyuan Zhu, Wenxian Li, Hongming Jin, Ying Li
Summary: The use of micron BN powders as diffusion sources in the grain boundary diffusion process for HDDR Nd-Fe-B powders resulted in a 52.1% enhancement in coercivity, although with a slight reduction in remanence due to the non-magnetic nature of BN powders. The research also found that the presence of BN in intergranular phases and their interaction with grain boundary phases contributed to the enhancement of coercivity, signifying the importance of further research and development in grain boundary diffusion processes using non-rare earth materials to reduce the reliance on rare earth elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Geochemistry & Geophysics
Asim Siddique, Peter Boelens, Fangchao Long, Shengqiang Zhou, Veerle Cnudde, Thomas Leissner
Summary: Magnetic separation plays a crucial role in mineral processing and recycling industries. This study proposes a methodology to comprehensively characterize and classify Waste Electrical and Electronic Equipment (WEEE) slag, aiming to establish the connection between slag properties and the separation process. The methodology involves sieving, classification based on magnetic susceptibility, and mineral liberation analysis. This in-depth analysis provides insights into the separation behavior of different slag phases, contributing to the development of predictive separation models.
Correction
Materials Science, Multidisciplinary
Pan-jun Wang, Ling-wei Ma, Xue-qun Cheng, Xiao-gang Li
Summary: Regrettably, the original version of this article contains mistakes. The symbols in Table 2 are incorrectly used.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Polymer Science
Shiv Kumar, Ragini Raj Singh, P. B. Barman
Summary: MgNi ferrite nanoparticles were successfully synthesized using an aqueous sol-gel method for targeted drug delivery and other electronic applications. Characterization of the nanoparticles was done using various techniques, showing nearly superparamagnetic behavior with high magnetic saturation and negligible coercivity. The formation of spinel ferrite structure was confirmed by absorption bands in the FTIR plots.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Subodh Khamari, Ashish Kumar, Niharika Mohapatra, Rajan Jha
Summary: This study presents a microfiber-based magnetometer that operates in high magnetic fields and is suitable for non-invasive medical diagnostics. The magnetometer utilizes NiFe2O4 ferrite fluid nanoparticles and demonstrates high sensitivity and a large operational range. The synthesized nanoparticles were characterized using various techniques.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Tanjina Nasreen Ahmed, Maria Camila Belduque, D. C. Binod, Jitendra S. Tate, Wilhelmus J. Geerts
Summary: The study shows that SrO(Fe2O3)(6)/PA-12 filaments exhibit flow-induced anisotropy, with magnetic hysteresis and viscosity varying with field and field angle; M-x magnetic viscosity is maximum in the easy plane, while M-y magnetic viscosity is almost zero.
Article
Chemistry, Physical
K. Yan, Z. W. Chen, Y. N. Zhao, C. C. Ren, W. J. Lu, A. W. Aldeen
Summary: Rare earth element Sc has a strong grain refining effect on cast aluminum alloys by forming Al3Sc particles as heterogeneous nucleation cores, which can be observed via microscopy. The internal structure of Al3Sc particles shows coarse dendritic and fine cell structures, with white oxide residues in some particles. At the interface between Al3Sc and Al matrix, two parallel crystallographic ORs were observed along with a special pseudomorphic solid layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
S. Mahalakshmi, Jeyanthinath Mayandi, Suresh Sagadevan, V Ragavendran, K. Manikandan, S. Arumugam, J. M. Pearce, Vishnukanthan Venkatachalapathy
Summary: This study synthesizes barium titanate (BaTiO3) nanoparticles using a low-cost sol-gel hydrothermal method at different temperatures and investigates their second harmonic generation (SHG) effects. The crystal structure of BaTiO3 changes from simple cubic to rhombohedral, resulting in structural distortion and phase transition. The variation in particle size and magnetic properties leads to an improved SHG conversion efficiency. This technique shows promise for fabricating bio-compatible imaging probes and coherent bio-markers in medicine and electronics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Carlos Jr. Narducci, Gabriela Lujan Brollo, Rafael Humberto Mota de Siqueira, Andre Silva Antunes, Antonio Jorge Abdalla
Summary: This study analyzed the effects of adding grain refiner Nb+B to Al alloys on the morphology and size of beta-Fe precipitates. The results showed that the addition of Nb+B significantly changed the size and morphology of the precipitates, making them notably refined and spheroidized.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Arnold Ronafoldi, Zsolt Veres, Maria Sveda, Andras Roosz
Summary: The mechanical properties of solidified alloys are greatly influenced by the grain size. The microstructure of the solidified material is usually columnar, resulting in directional differences in mechanical properties. Grain refinement materials can change the microstructure from columnar to equiaxed. However, in some cases, stirring the melt can achieve similar effects without using grain refinement materials. This study presents a new type of inductor that generates strong shearing stress in the melt flow, promoting equiaxed grain structure during solidification.
Article
Physics, Condensed Matter
R. M. Muthukrishnan, P. Mohammed Yusuf Ansari, S. M. Abdul Kader
Summary: This study reports the successful synthesis of a material based on the theory proposed by Goodenough and Kanamori et al. The super-exchange magnetic interaction of Fe3+-O2--Cr3+ in BiFeO3/LaCrO3 nanocomposite is explained through nearest neighbouring interaction (NN) and next nearest neighbour interaction (NNN), leading to possible ferromagnetic exchange. The significant enhancement of retentivity and high coercive nature make it suitable for hard magnet applications. The correlation between magnetic anisotropy value and the first-order derivative (dM/dH) of M H data confirms the successful construction of Fe-O-Cr interaction for magnetic applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Metallurgy & Metallurgical Engineering
Xiang-tao Zhang, Yi-zhao Gao, Yu-zhen Yu, Xiang-nan Wang, Zheng-gang Zhan
Summary: Rockfill materials are widely used in various construction projects due to their high density, good compaction performance, strong water permeability, small settlement deformation, and high bearing capacity. Developing a reasonable constitutive model is crucial for engineering computation and analysis, and offers great potential for further development.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Engineering, Electrical & Electronic
Meher Zaied, Alejandro Ospina-Vargas, Nicolas Buiron, Jerome Favergeon, Nour-Eddine Fenineche
Summary: This study investigates the effects of LBM machine parameters on the microstructure and magnetic properties of high silicon steel. The influence of normalized energy density on material density, grain size, crystallographic texture, and magnetic properties (magnetic flux density and coercivity) is particularly examined.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Physical
Seungchan Cho, Yeong-Hwan Lee, Sungmin Ko, Hyeonjae Park, Donghyun Lee, Sangmin Shin, Ilguk Jo, Yangdo Kim, Sang-Bok Lee, Sang-Kwan Lee
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Donghyeok Shin, SangWoon Lee, Dong Ryeol Kim, Joo Hyung Park, Yangdo Kim, Woo-Jin Choi, Chang Sik Son, Young Guk Son, Donghyun Hwang
Article
Materials Science, Multidisciplinary
Sung Min Park, Myeong Je Jang, Yoo Sei Park, Jooyoung Lee, Jae-yeop Jeong, Jaehoon Jung, Min-Kwan Choi, Yu-Seong Noh, Min-Ho Seo, Hyung Ju Kim, Juchan Yang, Yang Do Kim, Sung Mook Choi
KOREAN JOURNAL OF METALS AND MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Jae-Deuk Kim, Jae Won Kim, Joo Yong Cheon, Yang-Do Kim, Changwook Ji
KOREAN JOURNAL OF METALS AND MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Hyun-Uk Jun, Jae-Hun Kim, Jae Won Kim, Eun-Kyung Lee, Yang-Do Kim, Changwook Ji
KOREAN JOURNAL OF METALS AND MATERIALS
(2020)
Article
Chemistry, Physical
Jae Yong Jung, Juna Kim, Yang Do Kim, Young-Kuk Kim, Hee-Ryoung Cha, Jung-Goo Lee, Chang Sik Son, Donghyun Hwang
Summary: Hexagonal boron nitride nanophosphor particles were synthesized by pyrolysis with the addition of rare earth cerium ions for deep blue emission. Changes in crystallinity and luminescence were observed with increasing reheating temperature. The resulting cerium ion-doped hexagonal boron nitride nanoparticles were used in anti-counterfeiting applications by preparing an ink visible only under UV light.
Article
Energy & Fuels
Seong Hyun Kim, Yoo Sei Park, Chiho Kim, Il Yeong Kwon, Jooyoung Lee, Hyunsoo Jin, Yoon Seok Lee, Sung Mook Choi, Yangdo Kim
Article
Materials Science, Multidisciplinary
Ilyeong Kwon, Takehiko Nagai, Shogo Ishizuka, Hitoshi Tampo, Hajime Shibata, Shinho Kim, Yangdo Kim
Summary: This study presents an effective method of improving the performance of pure sulfide CIGS solar cells through an injection annealing system, which effectively removes secondary phase InSx from the surface of CIGS thin films. As the annealing temperature increases, the open-circuit voltage and fill factor of CIGS devices gradually increase, possibly due to the decrease in bulk defects. Ultimately, a pure sulfide CIGS solar cell with an efficiency of 12.16% was achieved via the injection annealing system.
CURRENT APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Donghyun Lee, Junghwan Kim, Sang-Kwan Lee, Yangdo Kim, Sang-Bok Lee, Seungchan Cho
Summary: Boron carbide reinforced aluminum alloy composites with continuous multi-interphases were successfully fabricated by stir casting process. The formation of interphases at the B4C/Al6061 interface during the process was consistent with thermodynamic calculations, suggesting possible quantitative compositions of B4C and Al6061 for forming the mentioned interphases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Byeong Chan Choi, Byoungkoo Kim, Byung Jun Kim, Yong-Wook Choi, Sang Joon Lee, Jong Bae Jeon, Yangdo Kim, Hyoung Chan Kim
Summary: This study investigated the low-temperature fracture behavior of an 80-mm-thick low-carbon steel plate welded by submerged arc. The relationship between impact absorbed energy and ductility-brittle transition temperature (DBTT) was evaluated based on microstructures, with acicular ferrite showing the highest resistance to low-temperature impact among various microstructures in the heat-affected zone.
Article
Materials Science, Multidisciplinary
Yoon-Seok Lee, Shunnosuke Yamagishi, Masataka Tsuro, Changwook Ji, Seungchan Cho, Yangdo Kim, Moonhee Choi
Summary: This study investigated the wear behavior and lubrication effect of AISI304 stainless steel under different lubrication conditions using a block-on-disk wear test. It was found that the oil lubrication demonstrated the best lubricating effect with unique chip-like debris. The observation of strain-induced martensitic (SIM) transformation after the wear test and the influence of lubrication regimes on wear behavior were significant findings from this study.
Article
Chemistry, Multidisciplinary
Chiho Kim, Seunghun Lee, Seong Hyun Kim, Jaehan Park, Shinho Kim, Se-Hun Kwon, Jong-Seong Bae, Yoo Sei Park, Yangdo Kim
Summary: The phosphidation-based synthesis of cobalt-iron-phosphate electrocatalyst shows high activity and durability for hydrogen evolution reaction in alkaline seawater, demonstrating potential for seawater splitting applications. An alkaline seawater electrolyzer utilizing non-precious-metal catalysts achieved better performance and higher solar-to-hydrogen efficiency compared to one using precious metal catalysts.
Article
Electrochemistry
Byeong-Min Ahn, Cheol-Woo Ahn, Byung-Dong Hahn, Jong-Jin Choi, Yang-Do Kim, Sung-Ki Lim, Joon-Hwan Choi
Summary: Sodium-metal chloride batteries are considered high-safety batteries and suitable for battery energy storage systems. This study presents an improved tubular-type simple test cell for accurate analysis of the cathode microstructure. By eliminating external failure factors, the improved test cell exhibits lower capacity gap and longer lifespan, which can advance research in tubular-type sodium-metal chloride batteries in small and academic laboratories.
Article
Chemistry, Multidisciplinary
Chae-Yeon Kwon, Jae-Yeop Jeong, Juchan Yang, Yoo Sei Park, Jaehoon Jeong, Honghyun Park, Yangdo Kim, Kyoung-Seok Moon, Sung Mook Choi
FRONTIERS IN CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
You Kyung Han, Jae Yeong Cheon, Taehoon Kim, Sang Bok Lee, Yang Do Kim, Byung Mun Jung
