Article
Nanoscience & Nanotechnology
Jung-Uk Lee, Young-Kyun Kim, Seong-Moon Seo, Kee-Ahn Lee
Summary: This study demonstrates that the CM247LC alloy manufactured using the L-PBF and SLM methods has excellent mechanical properties. The microstructure and mechanical properties of the SLM-built CM247LC alloy can be improved through HIP post treatment. The study also reveals that the defect characteristics of the alloy vary significantly with different scan speeds and hatch spaces, with the optimal microstructure achieved at an intermediate scan speed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Yi Xiao, Lihui Lang, Wencai Xu, Dexin Zhang
Summary: In this paper, the advanced hot isostatic pressing-diffusion bonding (HIP-DB) technology was proposed to directly join copper alloy and nickel-based superalloy. The interfacial microstructure, element distribution, and phase composition of the obtained joint were analyzed, and the mechanical properties of the joint were evaluated. The results showed that a good bonding quality has been achieved by hot isostatic pressing-diffusion bonding.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Manufacturing
Xingchen Yan, Shujun Yue, Jinguo Ge, Chaoyue Chen, Rocco Lupoi, Shuo Yin
Summary: Ti6Al4V triply periodic minimal surface and trabecular lattices were manufactured using selective laser melting (SLM) and investigated after hot isostatic pressing (HIPing) treatment.The HIPing treatment had limited influence on pore elimination when the pore diameters were larger than 30μm. The microstructural anisotropy was effectively eliminated after HIPing and the energy absorption capacity significantly improved due to the transformation induced plasticity effect of alpha + beta laths formation. The fracture mechanism was altered from the brittle-dominated quasi-cleavage mode to ductility-dominated mode.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Nanoscience & Nanotechnology
Derui Jiang, Yang Tian, Yuman Zhu, Shuai Huang, Aijun Huang
Summary: This study demonstrates the feasibility of using a core-shell approach combined with hot isostatic pressing (HIP) to improve the productivity of laser powder bed fusion (LPBF) process for producing Hastelloy-X (HX) components. The core-shell HX with HIP treatment shows a grain size gradient from shell to core, leading to better mechanical properties compared to the HX without the core-shell structure. Moreover, the core-shell approach significantly improves the LPBF production rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Dechun Ren, Lianmin Zhang, Yujing Liu, Haibin Ji, Shujun Li, Wei Jin, Jiafeng Lei
Summary: Hot isostatic pressing (HIP) can improve the mechanical properties and corrosion resistance of Ti-Ni alloys fabricated by selective laser melting (SLM) by mitigating internal defects. HIP treatment enhances the ultimate tensile strength, elongation to fracture, and corrosion resistance of SLM Ti-Ni alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Qing Teng, Yin Xie, Shanshan Sun, Pengju Xue, Anping Long, Tingguang Wu, Chao Cai, Jianzheng Guo, Qingsong Wei
Summary: The microstructure and mechanical properties of nickel-based superalloy prepared by HIP are influenced by the preparation temperature, emphasizing the importance of parameter optimization for controlling the microstructure and mechanical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Metallurgy & Metallurgical Engineering
Yuting Lv, Yaojie Liu, Rui Wang, Hongyao Yu, Zhongnan Bi, Guohao Liu, Guangbao Sun
Summary: The TiC/GTD222 nickel-based composite prepared through SLM and HIP processing exhibits a relatively low weight loss rate in a hot corrosion environment. The addition of alloying elements facilitates the formation of multiple protective oxide films rich in Al, Ti, and Cr, which enhances the material's resistance to hot corrosion. Additionally, the HIP treatment results in a reduction of grain size and an increased number of grain boundaries, promoting the formation of protective films.
ANTI-CORROSION METHODS AND MATERIALS
(2023)
Article
Engineering, Manufacturing
Shanshan Sun, Qing Teng, Yin Xie, Tong Liu, Rui Ma, Jie Bai, Chao Cai, Qingsong Wei
Summary: Nickel-based superalloys exhibit severe cracking tendencies during laser powder bed fusion (LPBF), impeding their widespread application in aerospace. A two-step heat treatment process was proposed to obtain crack-free components with desirable mechanical properties, showing improvements in tensile strength and ductility after the treatment. The microstructure development and correlation with tensile properties were systematically revealed, providing valuable insights for industrial applications.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Yuting Lv, Yaojie Liu, Qiang Zhang, Hongyao Yu, Rui Wang, Guangbao Sun, Guijiang Wei
Summary: In this study, hot isostatic pressing (HIP) treatment was carried out on a TiC/GTD222 nickel-based composite prepared by selective laser melting (SLM). The results showed that HIP treatment could promote the formation of nanoscale carbides and gamma ' phase, and decrease the dislocation density of the composite, leading to significant improvements in yield strength and tensile strength.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Qi Shi, Feng Qin, Kefeng Li, Xin Liu, Ge Zhou
Summary: Selective laser melting fabricated 17-4PH stainless steel parts were subjected to solution and aging treatments conducted under vacuum and hot isostatic pressing (HIP) conditions. The microstructure of the samples were characterized, showing an improvement in relative density after HIP treatment. Mechanical testing results indicated that a simultaneous improvement of tensile strength and ductility could be obtained through solutionizing and aging treatments done in HIP, with a significant enhancement of tensile strength achieved by combining high pressure solutionizing and water cooling aging treatments.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Lebiao Yang, Xiaona Ren, Chao Cai, Pengju Xue, M. Irfan Hussain, Yusheng Shi, Changchun Ge
Summary: The capsule characteristics have an impact on the deformation and densification behavior of the alloy powder compact during HIP. The length and thickness changes of the capsule can result in uneven shrinkage and densification. Therefore, the influence of capsule characteristics on material performance should be considered in the HIP process.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hui Wang, Hong Wu, Yong Liu, Wenbin Qiu, Hao Deng, Lvjun Zhou, Longqing Chen
Summary: This study investigates the effects of microstructure on the high-temperature oxidation behavior and mechanical properties of Hastelloy X alloys. Experimental results show that a large number of microcracks exist in the samples prepared by selective laser melting (SLM) technique during oxidation at 900 degrees C. However, these cracks can be effectively eliminated with the assistance of hot isostatic pressing (HIP), resulting in improved oxidation resistance. This work provides valuable support for explaining the oxidation resistance and fracture mechanism of Hastelloy X superalloys in high-temperature service environments.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Physical
Tian Xia, Rui Wang, Zhongnan Bi, Guoliang Zhu, Qingbiao Tan, Rui Wang, Ji Zhang
Summary: In this study, additive manufacturing processed GTD222 was heat treated and found to have higher strength due to the precipitation of gamma' and nano-scaled carbides. The results provide important information for optimizing the heat treatment process of the AM processed superalloy.
Review
Materials Science, Multidisciplinary
Maohang Zhang, Baicheng Zhang, Yaojie Wen, Xuanhui Qu
Summary: This paper introduces the application studies of selective laser melting in the field of nickel-based superalloys, including the strengthening mechanism and phase change evolution, the influence of laser parameters and heat treatment process on mechanical properties, as well as the industrial applications and future prospects.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Zhibo Hao, Tian Tian, Xinggang Li, Yuhe Huang, Shiqing Peng, Qiang Zhu, Changchun Ge
Summary: This study investigated the effects of heat treatment on the microstructure and mechanical properties of a nickel-based superalloy prepared by LPBF. The results showed that both HIP and HT processes improved the alloy's structure and properties, while an increase in HIP temperature led to grain refinement and elimination of some structural defects.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Yiwang Jia, Dongfu Song, Nan Zhou, Kaihong Zheng, Yanan Fu, Da Shu
Summary: In this study, the effects of Si content on grain growth and solute-suppressed nucleation zone in Al-13Cu and Al-13Cu-7Si alloys were quantitatively studied. The addition of Al-5Ti-1B master alloy can refine the grain size in Al-13Cu alloy, while the presence of 7% Si content resulted in loss of inoculation ability of TiB2 and accelerated grain growth rate.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Shubin Wang, Song Lu, Mingxu Wu, Donghong Wang, Guoliang Zhu, Changlin Yang, Da Shu, Baode Sun, Levente Vitos
Summary: Compositional tuning can improve the mechanical properties of high-entropy alloys. In this study, reducing Zr content was shown to destabilize the BCC phase and trigger a transformation to the HCP phase. Two medium entropy alloys with excellent mechanical properties were designed through the induced plasticity effect.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Chemistry, Physical
Yuliang Zhao, Dongfu Song, Haoliang Wang, Yiwang Jia, Bo Lin, Yue Tang, Ying Tang, Da Shu, Zhenzhong Sun, Yanan Fu, Weiwen Zhang
Summary: Recycled Al-Mg-Mn-Fe alloys with different Fe levels were successfully prepared by squeeze casting. The relationship between microstructural evolution and mechanical properties was studied using various techniques. The results showed that Fe additions increased the yield strength and ultimate tensile strength of the alloys. The morphological evolution of the alloys from individual Chinese-script to interconnected plate-like shape was observed. In-situ radiography revealed the facet growth behavior of Al6(FeMn) phases during solidification. The applied pressure was found to refine the grains and reduce the volume fraction of pores, contributing to the improvement of strength and elongation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Fei Xiao, Shubin Wang, Yixiao Wang, Da Shu, Guoliang Zhu, Baode Sun, David StJohn
Summary: The primary Al3Nb with tetragonal D0(22) structure was found to be extremely effective in grain refinement for Al-Zn-Mg-Cu alloys during selective laser melting. Adding 1.5wt% Nb nanoparticles transformed columnar crystals into fine equiaxed crystals, eliminating defects such as cracks and porosity. Due to the high number density of primary Al3Nb and coherent interface with the Al matrix, the alloy exhibited excellent mechanical properties after T6 heat treatment.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Mingxu Wu, Shubin Wang, Fei Xiao, Guoliang Zhu, Chao Yang, Da Shu, Baode Sun
Summary: An equiatomic VNbTi medium-entropy alloy with outstanding tensile properties and unique deformation behavior has been reported. The alloy exhibits three deformation mechanisms - screw dislocation glide, deformation twinning, and dislocation accumulation induced kink bands, which contribute to a large elongation above 20%. The activation of twin bands and kink bands impedes dislocation motion and alleviates stress concentration, providing opportunities for designing ductile refractory medium- and high-entropy alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Mingxu Wu, Shubin Wang, Fei Xiao, Gaoyuan Shen, Yusheng Tian, Chao Yang, Guoliang Zhu, Donghong Wang, Da Shu, Baode Sun
Summary: This study designs a novel lightweight and refractory high-entropy alloy with the possibility of optimizing materials based on the high-entropy strategy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Fei Xiao, Mingxu Wu, Yixiao Wang, Shubin Wang, Da Shu, Donghong Wang, Guoliang Zhu, Jiawei Mi, Baode Sun
Summary: In this study, medium-entropy metal diboride (Ti1/3Cr1/3V1/3)B2 with a hexagonal TiB2-type crystal structure was synthesized and its effect on refining pure aluminum grains was investigated. It was found that adding a small amount of (Ti1/3Cr1/3V1/3)B2 can effectively reduce the lattice mismatch between Al and (Ti1/3Cr1/3V1/3)B2, resulting in decreased undercooling and significantly reduced grain size in pure aluminum.
Article
Engineering, Manufacturing
Wenzhe Zhou, Yusheng Tian, Qingbiao Tan, Shen Qiao, Hua Luo, Guoliang Zhu, Da Shu, Baode Sun
Summary: The study investigates the effect of carbon element on the printability and mechanical properties of non-weldable superalloys processed by laser powder bed fusion (LPBF). It is found that a moderate increase of carbon content can improve printability and mechanical properties, and reduce cracking susceptibility.
ADDITIVE MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Leyao Zhou, Donghong Wang, Jiayu Cui, Daiyin Zhao, Shumei Liu, Sansan Shuai, Yajun Yin, Da Shu
Summary: Gas turbine blades, with variable cross-sections and a thin-walled structure, have strict dimensional and geometrical tolerance requirements. This paper proposes a numerical simulation method to predict the deformation of single-crystal blades during the investment casting process, including wax pattern deformation, core deflection, and directional solidification. The experiments confirm the accuracy of the simulation predictions, and the optimal process parameters for minimal blade section deformation are determined. The proposed finite element model provides effective guidance for controlling the dimensional accuracy of turbine blades in all investment casting processes.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Review
Metallurgy & Metallurgical Engineering
Yu-sheng Tian, Wen-zhe Zhou, Qing-biao Tan, Ming-xu Wu, Shen Qiao, Guo-liang Zhu, An-ping Dong, Da Shu, Bao-de Sun
Summary: This work reviews the recent progress in the alloy design, microstructure, and mechanical properties of refractory high-entropy alloys (RHEAs), as well as discusses the underlying strengthening mechanisms and deformation behavior. RHEAs, composed mainly of near-equimolar refractory elements, display superior mechanical properties, especially at high temperatures. Despite their limited room-temperature ductility, efforts have been made to address this trade-off, and some RHEAs show potential for high-temperature applications in the future. Additionally, RHEAs possess other attractive properties, such as biocompatibility and wear resistance.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Decheng Kong, Li Wang, Guoliang Zhu, Yiqi Zhou, Xiaoqing Ni, Jia Song, Liang Zhang, Wenheng Wu, Wei Wu, Cheng Man, Da Shu, Baode Sun, Chaofang Dong
Summary: With the development of aerospace and transportation, high-strength structural materials manufactured by additive manufacturing techniques are receiving more attention. This study investigates the effects of post-heat-treatment on the microstructure, mechanical properties, and corrosion behaviors of Al-added CoCrFeMnNi high-entropy alloys prepared by laser powder bed fusion.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jia Liu, Shubin Wang, Junfeng Wang, Peiying Shi, Jiayu Cui, Da Shu, Zhibo Du, Weichao Wang, Donghong Wang, Baode Sun
Summary: This work assesses the laser beam weldability of an equiatomic TiZrHfNbTa refractory high entropy alloy (HEA) and the dissimilar weldability of TiZrHfNbTa to C103 niobium-based alloy. The single BCC phase remains stable in both the TiZrHfNbTa welding joint and HEA-C103 dissimilar welding joint. Fine equiaxed grains are obtained in both weld fusion zones with no detectable cracks. Despite the presence of some porosity in the fusion zone, the tensile properties of the welded samples are comparable to the base materials. This study confirms the excellent laser weldability of the prototype TiZrHfNbTa refractory HEA and its good dissimilar weldability to the commonly used C103 alloy.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Chemistry, Physical
Wenzhe Zhou, Yusheng Tian, Dongyu Wei, Qingbiao Tan, Decheng Kong, Hua Luo, Wenmao Huang, Guoliang Zhu, Da Shu, Jiawei Mi, Baode Sun
Summary: The effects of HIP and THT methods on improving the properties of IN738 alloy were investigated. HIP reduced the porosity and residual stress of LPBF IN738-0.3C samples. THT achieved better yield strength, ultimate tensile strength, and elongation. These results can serve as a reference for suitable heat treatments of other AM precipitation-hardened Ni-based superalloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Metallurgy & Metallurgical Engineering
Zhu Guoliang, Kong Decheng, Zhou Wenzhe, He Jian, Dong Anping, Shu Da, Sun Baode
Summary: Traditional high-strength nickel-based superalloys are prone to cracking due to the wide solidification temperature range and high proportion of low melting point eutectic phases. The crack formation is caused by the release of residual stress and rapid nucleation of gamma ' precipitates during the post-heat treatment process, which limits their application in additive manufacturing. This review presents the research progress in crack formation mechanism and cracking-free design of high-strength nickel-based superalloys fabricated via additive manufacturing, as well as proposes research prospects for crack control.
ACTA METALLURGICA SINICA
(2023)
Article
Metallurgy & Metallurgical Engineering
Wang Donghong, Sun Feng, Shu Da, Chen Jingyang, Xiao Chengbo, Sun Baode
Summary: The development of material genomics engineering and intelligent material-processing technology provides new ideas for researching, developing, and manufacturing key thermal superalloy components of aeroengines. By developing a high-throughput dynamic simulation software system and a data-driven process optimization method, a new nickel-based casting superalloy with improved high-temperature durability was selected from a large number of component combinations. Additionally, the precision molding capability of complex superalloy castings was enhanced through the integration of data-driven casting deformation analysis.
ACTA METALLURGICA SINICA
(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)