Article
Green & Sustainable Science & Technology
Yibing Xie, Mengyu Wang, Xueqian Wang, Langlang Wang, Ping Ning, Yixing Ma, Jichang Lu, Rui Cao, Yu Xue
Summary: This study focused on the effect of magnetic field assistance on the catalytic oxidation of AsH3 by Fe/HZSM-5 catalyst. It was found that the magnetic field improved the catalytic performance and prolonged the excellent AsH3 removal efficiency. This work provides new insights into magnetic field-assisted zeolite catalysis.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Materials Science, Multidisciplinary
Zhiyuan Wang, Yanfei Huang, Jie Zhou, Lei Zhang, Zhiguo Xing, Haidou Wang, Debin Shan
Summary: This study presents a thermal spraying technique of ferromagnetic metal powder assisted by pulsed magnetic field to investigate its effect on the spraying process. The results show that the use of pulsed magnetic field can significantly improve the microstructure, porosity, mechanical properties, and tribological properties of the coating. The mechanism of coating formation under pulsed magnetic field is discussed, and it is found that the magnetic poles play a crucial role in attracting and accelerating the movement of the Fe phase material, leading to improved coating performance.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
Pimchanok Ieamviteevanich, Wiyada Mongkolthanaruk, Kajornsak Faungnawakij, Ehsan Daneshvar, Amit Bhatnagar, Supree Pinitsoontorn
Summary: Biomass-based carbon aerogels have gained attention as effective and low-cost oil sorbents or oil/water separators. This study successfully fabricated magnetic carbon nanofiber (MCF) aerogels and investigated the effect of pyrolysis temperature on their properties. The MCF aerogels pyrolyzed at 700 degrees C exhibited the most desirable oil sorption capacity and hydrophobic properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Thermodynamics
Heather Murdoch, Anit Giri, Daniel Field, Efrain Hernandez-Rivera, Matthew Guziewski
Summary: Processing of materials under an externally applied magnetic field could impact the relative stability of phases, with magnetic properties needing to be considered for accurate predictions. This study evaluated the magnetic properties of twelve binary iron systems, finding that alloy composition affects the magnetic moment and Curie temperature. The results highlight the importance of compositionally dependent magnetic property predictions for processing under magnetic fields.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Chemistry, Analytical
Qing Cheng, Yanzhuo Lv, Deyu Li, Ning Li, Qiao Ding, Yinghai Zhao, Qi Zhao
Summary: Resveratrol has been found to improve the antioxidant capacity of Sn-Fe alloy coating as a stabilizer in the electroplating solution, but excessive concentration is detrimental to the corrosion resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yinping Zeng, Tobias Mittnacht, Walter Werner, Yong Du, Daniel Schneider, Britta Nestler
Summary: The quantitative simulation of microstructure evolution during heat-treatment of alloys under an external magnetic field is a challenging task. In this study, the Gibbs free energy contribution from the external magnetic field is taken into consideration, and a thermodynamic model incorporating this contribution successfully reproduces the experimental Fe-C phase diagram under the magnetic field. This energy, along with bulk Gibbs energy, demagnetizing field energy, and interfacial energy, is utilized in a developed phase-field model to bridge the gap between experimental findings and simulative investigations. The phase-field model is then applied to simulate the microstructure in Fe-C alloys with or without a magnetic field. The results indicate that the experimental two-phase microstructure, accompanied by chemically-driven phase transformation, in Fe-0.4 and Fe-0.6 wt%C alloys under the magnetic field can be quantitatively described by the present phase-field simulation. The predicted fraction of ferrite in the Fe-C system agrees reasonably with the experimental data, highlighting the importance of thermodynamics in tailoring the microstructure and properties of alloys with an applied magnetic field. This work demonstrates that the CALPHAD coupled phase-field model can quantitatively describe microstructural evolution and provides an effective approach for simulating corresponding phase transitions with an external field.
Article
Engineering, Chemical
Po-Wei Lan, Cheng-Chien Wang, Chuh-Yung Chen
Summary: In this study, Ni-Fe catalysts with different Ni/Fe ratios were prepared for efficient CO2 methanation, with Ni8Fe2 catalyst showing the best performance in converting over 80% of CO2 to methane. Under reaction conditions controlled at H2/CO2 = 4 and GHSV around 1000 h(-1), the CH4 selectivity of CO2 methanation could reach 95%. These low-cost and easily prepared Ni-Fe catalysts have high potential for future commercialization.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Optics
Ao Gao, Jingfu Ye, Chenxi Tu, Yi Liu, Shiliang Qu
Summary: This paper proposes a scheme called under-sampled length spectrum retrieval (ULSR) for fiber Fabry-Perot (F-P) cavity refractive index (RI) demodulation. Unlike the wavelength spectrum method, ULSR can detect physical quantities using only a monochromatic laser and photodetectors, eliminating the need for wideband lasers or expensive infrared spectrometers. By fabricating eight F-P cavities of different lengths to sample the cavity length spectrum, the RI of F-P cavity fillings can be demodulated using the obtained under-sampled length spectrum. The ULSR system achieves an index measurement accuracy of 1 x 10-4 in the glucose solution index range of 1.3294-1.3746 at a wavelength λ = 1.55μm. Higher accuracy and a wider range of index demodulation are expected with more than eight F-P cavities. The proposed scheme has the advantages of low system complexity, low cost, high reliability, high detecting accuracy, and wide detecting range, making it very promising for the wide application of F-P cavity sensors. Additionally, ULSR releases wavelength freedom, making it a strong candidate for multiplexed sensing based on wavelength division multiplexing.
Article
Physics, Multidisciplinary
A. Ahmed, S. Singha, N. K. Neog, T. K. Borthakur
Summary: A spectroscopic study investigates the dynamics of pulsed plasma stream in a coaxial plasma accelerator under the influence of an external longitudinal magnetic field. The excitations and emissions of plasma species in Argon plasma stream are analyzed, and their behavior under different parameter variations and magnetic field presence is reported. It is found that the recombination and diffusion processes of plasma species are influenced by pressure variation, and the ionization and excitation processes are affected by cathode voltage variation.
Article
Materials Science, Multidisciplinary
Xingjie Jia, Yaqiang Dong, Ling Zhang, Yanqiu Li, Aina He, Jiawei Li
Summary: This study investigated the effects of static magnetic field strength on the structure, stability, crystallization, and magnetic properties of melt-spun Fe81.6Si4B13-Cu1.4 alloys. The results showed that an increase in magnetic field strength promoted the formation of a-Fe crystals and improved the magnetic softness of the alloy. The Fe81.6Si4B13-Cu1.4 alloy prepared under 200 mT magnetic field exhibited fine crystals and excellent soft magnetic properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yu-qin Wu, Ze-an Tian, Fang Liu, Zi-Hou Yuan, Wei Chen, Chi Zhang, Cheng-xin Li
Summary: The study found that the viscosity of Ag-Sn solder alloys is affected by both magnetic field and alloy composition, with the magnetic field also improving the surface structure, reducing segregation, refining grain size, and enhancing wettability of the alloy.
Article
Chemistry, Multidisciplinary
Rex C. Handford, Mark A. Nesbit, Patrick W. Smith, R. David Britt, T. Don Tilley
Summary: The metallostannylene complex exhibits the formation of multiple bonds and the activation of phosphine ligands in both oxidation and reduction reactions. DFT studies suggest that the cleavage of C-H bonds across the Fe-Sn bond is favored over C-H activation exclusively at the tin center, highlighting the effect of iron-tin cooperativity in the system.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Zheng Li, Kejian Li, Chengkai Qian, Dexin Wang, Wen Ji, Yao Wu, Zhipeng Cai, Qu Liu
Summary: High-intensity pulsed magnetic field was used to modify the microstructure of quenched 8Cr4Mo4V bearing steel under cryogenic conditions. The results showed that deep cryogenic treatment promotes the transformation from retained austenite to martensite, while coupling high-intensity magnetic field with deep cryogenic treatment inhibits this phase transformation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Jili Ding, Hongjie Xu, Zhiguang Shi, Xuan Li, Tao Zhang
Summary: The influence of primary alpha-Fe precipitation on thermal and magnetic properties was investigated by producing Fe76.5-xCu1NbxSi13.5B9 (x=0, 1, 2 and 3) amorphous/nanocrystalline ribbons through melt-spinning. It was found that rapid quenching and heat treatment had similar effects on alpha-Fe precipitation. By optimizing components and heat treatment, magnetic properties of the ribbons could be significantly improved.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Mechanics
Jie Zhang, Md Rifat Hassan, Cheng Wang
Summary: Numerical investigation was conducted on the particle-particle interaction and relative motion of a pair of equal-sized magnetic particles in simple shear and plane Poiseuille flows. The direction and strength of the magnetic field were found to have significant effects on the dynamics of the particles, impacting their trajectories and relative motion. This study provides insights into understanding the mechanisms of particle-particle interaction in magnetorheological fluids under a uniform magnetic field.
