Article
Chemistry, Physical
Guangxin Shen, Shaoyuan Lyu, Yun Zhao, Chen You, Xuewei Wang, Minfang Chen
Summary: Based on first-principles density functional theory, this study systematically investigated the adhesion, stability, and bonding properties of the interfaces between Mg and oxide (MgO and CaO). It was found that MgO can serve as a more effective nucleation substrate in Mg melt compared to CaO.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Xiannian Sun, Xuan Jiang, Yingchun Shan, Xiaoguang Han, Jiujun Xu, Jiangtao Li
Summary: Two kinds of pure nanometric MgAl2O4 powders were successfully synthesized, with different particle size distributions, demonstrating the importance of synthesis method for sinterability of MAS ceramics.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Guangyu Hao, Zhiyin Deng, Chunxin Wei, Miaoyong Zhu
Summary: Laboratory experiments were conducted to study the dissolution and penetration behaviors of MgO-based refractories in CaO-SiO2-Al2O3-MgO-TiO2 system ladle refining slags. It was found that the addition of TiO2 increases the solubility of MgO in the slags and influences the physical properties of the slags. TiO2 content affects the viscosity, surface tension, and contact angle between the slags and MgO refractory. The depth of slag penetration into the refractory shows an initial increase and then decrease. TiO2 accelerates the degradation of MgO refractories, but the suitable MgO content in the slags can mitigate this effect.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Metallurgy & Metallurgical Engineering
Xiaopei Guo, Jie Dang, Min Tan, Tao Li, Kai Liu, Liying Ju, Bo Shang, Xiaoming Ding
Summary: The formation process of composite inclusions was simulated on an atomic scale using first principle calculations through the adsorption model. The most stable adsorption positions of Mn and S atoms were determined by comparing the adsorption energy through structural optimization. The adsorption of the atoms was further explained by calculating the density of state (DOS), partial density of state (PDOS), and charge density distribution (CDD).
INTERNATIONAL JOURNAL OF METALCASTING
(2023)
Article
Materials Science, Multidisciplinary
Minghui Wu, Changyu Ren, Ying Ren, Lifeng Zhang
Summary: In this study, thermodynamic calculations and laboratory experiments were conducted to investigate the evolution of MgO-Al2O3 inclusions in a GCr15-bearing steel. It was found that the inclusions transformed from Al2O3 to MgO-Al2O3 to MgO with the increase of Mg content. The agglomeration of MgO-Al2O3 inclusions was observed, and the attraction force between inclusions was calculated.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Crystallography
Zhen Pei, Haixiao Huang, Xingzhong Guo, Jinming Zhang, Mingxing Chen
Summary: MgO-Al2O3-SiO2 (MAS) glass-ceramics with controllable crystalline phases were prepared via melting method and heat treatment. The effects of glass components on crystallisation kinetics, nucleation, crystallisation, and properties were investigated. The composition influenced the crystallisation temperature, activation energy, nucleation temperature, and time, as well as the relative proportion of crystalline phases.
Article
Metallurgy & Metallurgical Engineering
Zhiqi Mia, Guoguang Cheng, Shijian Li, Wensheng Qiu, Lingyu Zeng, Hu Long
Summary: The formation mechanism of large-size CAMS inclusions in high carbon chromium bearing steel was investigated through industrial experiments and thermodynamic analyses. It was found that the inclusions originated from slag entrapment during BOF tapping and LF refining process. Optimizations during steelmaking processes effectively removed these inclusions.
ISIJ INTERNATIONAL
(2021)
Review
Metallurgy & Metallurgical Engineering
Zhiyin Deng, Zonghui Liu, Miaoyong Zhu, Liqiao Huo
Summary: This review presents an overview of the formation, evolution, and removal of MgO·Al2O3 spinel inclusions in steel, along with suggestions for controlling these inclusions. It discusses the reclassification of formation mechanisms, the effects of elements like Ca, Ti, Mn, and rare earth on inclusion evolution, and methods for calculating phase stability diagrams. The sources, formation kinetics, agglomeration, separation, dissolution behaviors of spinel inclusions, and their advantages are also addressed in this review.
ISIJ INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Wenkui Yang, Jian Yang, Runhao Zhang, Han Sun, Jingling Song, Yinghui Zhao, Xuan Zhou
Summary: This study investigates the formation and evolution mechanism of Al2O3·SiO2·CaO and Al2O3·SiO2·CaO·MgO inclusions in seamless steel tube steel. The defects in the longitudinal cross section of the steel tube after rolling are mainly formed by Al2O3·SiO2·CaO·MgO inclusions and Al2O3·SiO2·CaO inclusions with CaS inclusions. The different steelmaking stages have typical inclusions composed of CaS, Al2O3·(SiO2), CaO·(SiO2), MnS·(TiN), Al2O3·SiO2·CaO·(CaS)·(MnS), Al2O3·SiO2·CaO·MgO·(MnO), and Al2O3·SiO2·CaO·MgO·(CaS)·(MnS). In the billet, Al2O3·SiO2·CaO-based and Al2O3·SiO2·CaO·MgO-based inclusions have larger average sizes than the other types of inclusions. SiO2 in deoxidized products can be reduced by [Al] to form Al2O3·SiO2 composite inclusions. The SiO2 in Al2O3·SiO2 inclusions can be continuously reduced by dissolved [Ca] to form Al2O3·SiO2·CaO composite inclusions. SiO2 in Al2O3·SiO2·CaO inclusions can be reduced by dissolved [Mg] to form Al2O3·SiO2·CaO·MgO composite inclusions. Another formation process of Al2O3·SiO2·CaO·MgO inclusions is the entrapment of ladle slag in the vacuum degassing (VD) stage.
STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Jin Hyung Cho, Johan Martinsson, Du Sichen, Joo Hyun Park
Summary: This study focuses on the effect of CaO-Al2O3-MgO-TiO2 slag on the removal of sulfur impurities in Incoloy(R) 825 superalloy, revealing that slag basicity has a significant influence on the desulfurization mechanism. When the basicity falls below the critical level, a shift in desulfurization mechanism occurs.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Qiang Zeng, Jianli Li, Qi Xu, Wenchun Yu
Summary: Large-scale non-deformation inclusions in tire cord steel increase the breakage risk. Silicon-manganese deoxidation is used to control the inclusion composition in the plasticized region with a lower melting point. The influence of composition change in refining slag on low melting point MnO-SiO2 system inclusions was studied. Experimental results showed that the MgO content in the top slag has little effect on the silicon-manganese oxide inclusions.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Sarib Jadoon, Michael Schindler, Mark G. Wirth, Odeta Qafoku, Libor Kovarik, Daniel E. Perea
Summary: This study examines the sequestration of copper (Cu) by organic matter (OM) in forest soil near the Horne smelter in Canada. The research reveals that Cu is sequestered as nano- to micrometer-sized spinels, cuprite nanoparticles, and in association with magnetite nanoparticles in the OM matrix. A model is proposed to explain the sequestration process.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Nanoscience & Nanotechnology
Mengbin Gu, Shangyi Li, Xueqi Fan, Jun Huang, Gang Yu
Summary: This study investigated the bridging ability of bismuth oxychalcogenide for constructing an effective photocarrier pathway to PFOA, showing outstanding photocatalytic activity of Bi2O2Se with a broad pH adaptability. The results provide new insights for the development of Se-coordinated catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Lorenzo Stratta, Andrea Arsiccio, Roberto Pisano
Summary: The diffusion kinetics of water has an effect on the heterogeneous nucleation temperature distribution of ice. Thawing temperature and residence time above 0 degrees C influence the width of the measured distributions. Enhanced diffusion leads to broader distributions, while limited diffusion results in narrower distributions. The experimental findings support a theoretical explanation based on the temperature dependence of diffusion kinetics in water.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Susumu Imashuku
Summary: The study demonstrates the possibility of distinguishing MgO center dot Al2O3 spinel particles and layer in MgO refractory for aluminum deoxidation process of stainless steel based on their luminescence colors in cathodoluminescence and X-ray excited optical luminescence images. The images can be acquired quickly within 2 seconds and 1 minute. Surface examination aids in precise identification, and XEOL imaging shows promise for nondestructive onsite evaluation of the MgO refractory.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)