Article
Materials Science, Multidisciplinary
Jinmei Sun, Tie Liu, Xiaoyu Guo, Shuang Yuan, Jun Wang, Noriyuki Hirota, Qiang Wang
Summary: The obvious grain refinement of primary MnSb phase has been observed in Mn-89.7 wt% Sb alloy solidified under a high-gradient magnetic field. The refinement can be attributed to the constituent supercooling in front of the solidification interface, which promotes nucleation of the primary MnSb phase, and is linked to the enrichment of Mn solute induced by the magnetic force and the Lorentz force.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Qiyang Tan, Haiwei Chang, Greta Lindwall, Erlei Li, Ananthanarayanan Durga, Guofang Liang, Yu Yin, Geoff Wang, Ming-Xing Zhang
Summary: This study investigates the mechanism of TiN in refining gamma-austenite in additive manufacturing of 316 stainless steel and its impact on the mechanical behavior. Experimental results show that the addition of TiN nanoparticles can lead to complete columnar-to-equiaxed transition and significant grain refinement. Thermodynamic and kinetic simulations confirm that TiN promotes the heterogeneous nucleation of 8-ferrite, which in turn refines the gamma-austenite. The high grain refining efficiency of TiN nanoparticles is verified in an Fe-4 wt.%Si 8-ferrite alloy. The grain refinement not only eliminates anisotropy but also improves the strength-ductility synergy in the 316 steel.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Wanjia Li, Wangchang Li, Yao Ying, Jing Yu, Jingwu Zheng, Liang Qiao, Juan Li, Shenglei Che
Summary: In this study, a high resistance oxide interface engineering was constructed to achieve the combination of high saturation magnetization and high resistivity in a newly Fe-N based magnetic material. The research findings are of great significance for the development of the next generation of soft magnetic materials.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Chemistry, Physical
J. S. Zuback, T. A. Palmer
Summary: By adjusting the alloying elements and nitrogen content, the formation of niobium-rich 6-phase precipitates in additively manufactured Inconel 625 during high temperature exposure can be suppressed. Hot isostatic pressing can improve niobium distribution and reduce 6-phase formation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Arpit Agrawal, Sam Bakhtiari, Reza Mirzaeifar, Daqiang Jiang, Hong Yang, Yinong Liu
Summary: This paper reports a comparative study on the amorphization of B2 structure of different equiatomic binary alloys. The study findings suggest that anti-site defects can cause severe random distortions to the B2 structures, leading to a decrease in crystalline ordering. Among the four alloys studied, NiTi and CuZr can be fully amorphous at a threshold concentration of anti-site defects, while AlFe and FeTi cannot. The ease of amorphization is higher in NiTi compared to CuZr, in terms of both the required defect concentration and temperature range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sudhansu Sekhar Hota, Debasish Panda, Ram Naresh Prasad Choudhary
Summary: The main objective of this research is to investigate the effect of adding potassium/tungsten on the characteristics of eco-friendly BiFeO3 and assess its potential applications. The results show that the addition of K/W transforms the structure of bismuth ferrite and the material exhibits high dielectric constant and low tangent loss. This indicates potential capacitive and ferroelectric properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Fateme Yoosefan, Ali Ashrafi, Seyed Mahmoud Monir Vaghefi
Summary: The high-entropy CoCrFeMoNi alloy exhibits remarkable strength, flexibility, and corrosion resistance. This study investigates its corrosion and tribocorrosion behavior. The cold-rolled samples show enhanced corrosion resistance due to their fine-grained microstructure and elevated hardness. However, increasing annealing temperatures reduce the corrosion resistance. The tribological performance demonstrates significant tribocorrosion resistance in all high-entropy alloy samples, and the reprotective layer in the annealed samples exhibits higher resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Multidisciplinary
Lei Yang, Tingkai Zhao, Abdul Jalil, Huijun Luo, Tao Jiang, Yuan Shu, Yazhou Yin, Weiyu Jia
Summary: In this study, a strategy utilizing oxygen vacancy concentration modulation was used to successfully grow semiconducting single-walled carbon nanotubes (s-SWCNTs) with narrow diameters. The Fe0.01Mg0.99O/CeO2(3) catalyst was employed to provide oxygen vacancies, allowing for selective etching of chemically active carbon nanotube caps during the growth process. The optimized conditions resulted in high purity s-SWCNTs with uniform diameters.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Materials Science, Multidisciplinary
Jianbao Zhang, Dongpeng Hua, Dexu Cui, Xin Li, Ke Hua, Yixuan He, Haifeng Wang, Yuhong Zhao
Summary: The grain refinement mechanism for rapid solidification of undercooled melts is still an open problem. In this study, spontaneous grain refinement was observed at both low and high undercooling, and a compromise mechanism of subgrain-assisted spontaneous grain refinement was proposed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Electrical & Electronic
Jean-Francois Michaud, Marc Portail, Daniel Alquier, Dominique Certon, Isabelle Dufour
Summary: This paper reviews the use of MEMS devices without sensitive layers in gas detection applications. These devices can measure a physical property of the gas to determine its concentration, and have the advantages of generality and high detection limits.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Akib Jabed, Golden Kumar
Summary: This study demonstrates that cryogenic rejuvenation promotes homogeneous-like flow and increases ductility in metallic glass samples. Conversely, annealing has the opposite effect, resulting in a smoother fracture surface.
SCRIPTA MATERIALIA
(2024)
Article
Engineering, Electrical & Electronic
Shuang Wang, Lijun Wu, Zhiqing Wang, Ziyue Qian
Summary: The geometric structure and electrical properties of zigzag and armchair DWSiNT perfect tubes with different Stone-Wales defects were simulated using the SCC-DFTB method. It was found that the atomic arrangement, stability, energy gap, and charge distribution strongly depend on the type of tube. The effects of strong and weak electric fields on the tubes were also investigated, showing different impact on stability and energy gap. These findings have implications for future experimental studies.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Devidas I. Halge, Vijaykiran N. Narwade, Nabeel M. S. Kaawash, Pooja M. Khanzode, Sohel J. Shaikh, Jagdish W. Dadge, Prashant S. Alegaonkar, Rajeshkumar S. Hyam, Kashinath A. Bogle
Summary: This study presents the design and fabrication of a high-performance blue light photodetector using an n-type cadmium sulfide (CdS) thin film and a p-type polyaniline (PANI). The photodetector demonstrates exceptional performance characteristics, including high responsivity, detectivity, and sensitivity, along with rapid response time and rectification behavior. The research represents a significant advancement in the field of high-performance photodetectors.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Xutao Huang, Yinping Chen, Jianjun Wang, Gang Lu, Wenxin Wang, Zan Yao, Sixin Zhao, Yujie Liu, Qian Li
Summary: This study aims to establish a novel approach to better understand and predict the behavior of materials with multi-scale lamellar microstructures. High-resolution reconstruction and collaborative characterization methods are used to accurately represent the microstructure. The mechanical properties of pearlite are investigated using crystal plasticity simulation and in-situ scanning electron microscopy tensile testing. The results validate the reliability of the novel strategy.
SCRIPTA MATERIALIA
(2024)
Article
Engineering, Electrical & Electronic
Xiang-Long Wei, Bao-Feng Shan, Zong-Yan Zhao
Summary: This study synthesized and characterized a CuAlO2/CuGaO2 heterostructure and evaluated its photocatalytic performance. The heterostructure exhibited superior performance compared to individual CuAlO2 and CuGaO2 photocatalysts, with increased carrier concentration, enhanced redox capabilities, superior electrochemical stability, and reduced interfacial resistance. Photocatalytic experiments demonstrated the remarkable oxidation potential and notable reduction activity of the heterostructure, outperforming CuAlO2 and CuGaO2 in degradation rates and hydrogen production rates, respectively. These findings highlight the superior performance and broad applicability of the CuAlO2/CuGaO2 heterostructure in various photocatalytic reactions.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Guowei Zhou, Yuanzhe Hu, Zizheng Cao, Myoung Gyu Lee, Dayong Li
Summary: In this work, a physics-constrained neural network is used to predict grain-level responses in FCC material by incorporating crystal plasticity theory. The key feature, shear strain rate of slip system, is identified based on crystal plasticity and incorporated into the loss function as physical constitutive equations. The introduction of physics constraints accelerates the convergence of the neural network model and improves prediction accuracy, especially for small-scale datasets. Transfer learning is performed to capture complex in-plane deformation of crystals with any initial orientations, including cyclic loading and arbitrary non-monotonic loading.
SCRIPTA MATERIALIA
(2024)
Article
Engineering, Electrical & Electronic
Kanyu Yang, Chaojie Shi, Ruizhao Tian, Haoyue Deng, Jie He, Yangyang Qi, Zhengchun Yang, Jinshi Zhao, Zhen Fan, Jun Liu
Summary: This study investigates the electrical and synaptic properties of Ag/TiO2 nanorod/FTO-based RRAM devices, focusing on the impact of different seed layer thicknesses on nanorod thickness and RRAM performance. The devices show remarkable achievements in terms of endurance, self-compliance, and resistance switching ratio. The switching mechanism is attributed to space-charge-limited conduction resulting from electron trapping in oxygen vacancy traps. The devices also maintain stable synaptic properties even after undergoing multiple cycles of long-term potentiation and depression.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Engineering, Electrical & Electronic
Micka Bah, Daniel Alquier, Marie Lesecq, Nicolas Defrance, Damien Valente, Thi Huong Ngo, Eric Frayssinet, Marc Portail, Jean-Claude De Jaeger, Yvon Cordier
Summary: This study investigates the AlN nucleation layer issue in GaN high frequency telecommunication and power switching systems fabricated after heteroepitaxy on Silicon or Silicon Carbide. It is shown that using 3C-SiC as an intermediate layer can significantly decrease RF propagation losses. Measurements and analyses demonstrate that dopant diffusion into the 3C-SiC pseudo-substrate is confined beneath the interface, and a slightly conductive zone is present beneath the AlN/3C-SiC interface, explaining the low propagation losses obtained for the devices. This work highlights the importance and efficiency of the 3C-SiC intermediate layer as a pseudo-substrate.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Xiaoyu Chen, Ranran Zhang, Hao Zou, Ling Li, Qiancheng Zhu, Wenming Zhang
Summary: Polyaniline-manganese dioxide composites exhibit high conductivity, long discharge platform, and stable circulation, and the specific capacity is increased by providing additional H+ ions to participate in the reaction.
SCRIPTA MATERIALIA
(2024)
Article
Engineering, Electrical & Electronic
Michihiro Yamada, Shuhei Kusumoto, Atsuya Yamada, Kentarou Sawano, Kohei Hamaya
Summary: In this study, we demonstrated the low-temperature growth of a Ge layer on a Co-based Heusler alloy via Sn doping, which improved the magnetic properties and spin signal.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2024)
