Article
Materials Science, Multidisciplinary
Jiapeng Sun, Qisheng Sun, Ying Liu, Bangjun Li, Zheng Zhang, Bingqian Xu, Songsong Xu, Ying Han, Yanxin Qiao, Jing Han, Guosong Wu, Paul K. Chu
Summary: The study investigates the use of ultrasonic severe surface rolling (USSR) to enhance the corrosion resistance of SLM 316L stainless steel, and finds that the USSR processed samples exhibit significant improvement in corrosion resistance, attributed to the unique gradient structure and chemically homogeneous and high-quality surface.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Zahra Abbasi, Hamid Reza Abedi
Summary: This study investigates the hot deformation behavior and recrystallization mechanisms of selective laser melted 316L stainless steel. The results show that the development of substructures and continuous recrystallization are the main softening mechanisms during thermomechanical processing. The presence of cellular substructures facilitates recrystallization, and both discontinuous and geometric dynamic recrystallization contribute to the deformation process.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Manufacturing
David J. Sprouster, W. Streit Cunningham, Gary P. Halada, Hanfei Yan, Ajith Pattammattel, Xiaojing Huang, Daniel Olds, Maryam Tilton, Yong S. Chu, Eric Dooryhee, Guha P. Manogharan, Jason R. Trelewicz
Summary: The hierarchical nature of additively manufactured materials requires a multimodal approach to quantify microstructural features and chemical heterogeneities. Using advanced synchrotron x-ray techniques and transmission electron microscopy, the analysis of microstructure and chemical heterogeneities in L-PBF 316L revealed significant dislocation density consistent with the formation of a cellular dislocation microstructure. The findings demonstrate the impact of microstructural defect state and its variation with printing speed on the resistance of L-PBF 316L to uniform and localized corrosion.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Manufacturing
Ying Liu, Jiapeng Sun, Yantao Fu, Bingqian Xu, Bangjun Li, Songsong Xu, Peilong Huang, Jianing Cheng, Ying Han, Jing Han, Guosong Wu
Summary: The gradient heterogeneous structure (GHS) architecture is proposed to achieve superior strength and ductility combination in additively manufactured (AM) 316L stainless steel. The GHS system consists of a gradient structured outer layer with varying grain size and a hierarchically heterostructured interlayer with varying length scales. By combining two types of heterogeneous structures, the GHS strengthens the synergistic effect, resulting in high-performance AM parts with superior strength and ductility.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Feng Xu, Feiyu Xiong, Ming-Jian Li, Yanping Lian
Summary: This study presented a numerical model to investigate the grain growth mechanisms during selective laser melting. The simulation results were in good agreement with experimental data. The findings of this study are significant for optimizing process parameters and controlling the microstructure and mechanical properties of fabricated parts.
Article
Chemistry, Physical
Hector Maicas-Esteve, Iman Taji, Marc Wilms, Yaiza Gonzalez-Garcia, Roy Johnsen
Summary: This study investigates the effects of process parameters on the microstructural and corrosion properties of additively manufactured stainless steel. The results show that scanning speed is the most influential factor in reducing porosity. Furthermore, the corrosion resistance of the samples worsens with an increase in porosity.
Article
Nanoscience & Nanotechnology
Venkata Krishnan Sampath, Praveen Silori, Parth Paradkar, Stanislau Niauzorau, Aliaksandr Sharstniou, Amm Hasib, Samuel Villalobos, Bruno Azeredo
Summary: This paper evaluates the corrosion resistance and weldability of 3D printed SS 316 L parts compared to their wrought counterparts. The results demonstrate that 3D printed parts have improved corrosion resistance and lower mechanical properties in welded joints compared to wrought parts, especially after accelerated corrosion.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
Yash Parikh, Mathew Kuttolamadom
Summary: The purpose of this research is to characterize and design property-graded bulk structures made from a single metallic alloy through a laser powder bed fusion process. The paper focuses on investigating the manufacture of stainless steel 316L structures and understanding the underlying causes of property variations within an acceptable range. The results show that property variations are influenced by porosity types/amounts, martensitic phase fractions, and grain sizes. This work lays the foundation for understanding and designing the mechanical performance of functionally-graded additively manufactured structures.
JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING-TRANSACTIONS OF THE ASME
(2023)
Article
Materials Science, Multidisciplinary
Hongqiao Qu, Jing Li, Fucai Zhang, Jiaming Bai
Summary: This study investigates the effects of solidification and remelting under a chessboard 67 degrees rotation scanning strategy on the microstructure and properties of selective laser melted 316L stainless steel. The findings provide insights into the relationship between microhardness, dislocation structure, and texture, contributing to a better understanding of the characteristics of 316L stainless steel.
MATERIALS & DESIGN
(2022)
Article
Engineering, Mechanical
Seyed Mohammadali Jazaeri Moghadas, Mahdi Yeganeh, Seyed Reza Alavi Zaree, Mostafa Eskandari
Summary: The effect of heat treatment on the microstructure and corrosion behavior of 316L stainless steel in Ringer's solution was investigated. The results showed that heat treatment can relieve residual stress and significantly affect corrosion resistance, with high temperature heat treatment leading to a severe reduction in corrosion resistance.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2022)
Article
Engineering, Chemical
Dengzhi Yao, Ju Wang, Meng Li, Tingting Zhao, Yao Cai, Xizhong An, Ruiping Zou, Hao Zhang, Haitao Fu, Xiaohong Yang, Qingchuan Zou
Summary: This paper investigates the segregation of 316L stainless steel powders during spreading and identifies the segregation mechanisms using the discrete element method. The results show that particle size and distribution have an influence on segregation behavior and properties of the powder bed, and increasing blade velocity can weaken the segregation behavior.
Article
Materials Science, Multidisciplinary
Arshad Yazdanpanah, Mattia Lago, Claudio Gennari, Manuele Dabala
Summary: The study investigated the effect of grinding-induced surface residual stress on stress corrosion cracking of SLM manufactured 316L austenitic stainless steel. High residual stress increased the risk of early SCC, with cracks initiating and propagating from melt pool boundaries, grains, machining marks, and pore sites. Galvanostatic tests identified three distinctive regions corresponding to crack and pit initiation and growth, highlighting the synergistic effects of dislocation density, stress concentration, molybdenum segregation, and surface residual stress on SCC susceptibility.
Article
Materials Science, Multidisciplinary
Cuiling Zhao, Yuchao Bai, Yu Zhang, Xiaopeng Wang, Jun Min Xue, Hao Wang
Summary: This study investigated the corrosion behavior of additively manufactured 316L stainless steel under different scanning strategies using selective laser melting. The research found that the scanning strategy significantly influenced the corrosion resistance in different building directions, with pitting corrosion being the main form of corrosion.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Mengkun Tian, Jahnavi Desai Choundraj, Thomas Voisin, Y. Morris Wang, Josh Kacher
Summary: In this study, liquid cell scanning transmission electron microscopy (STEM) was used to characterize the nanoscale origins of corrosion initiation in AM 316 L stainless steel. It was found that the corrosion preferentially occurred at dislocation cellular boundaries and localized corrosion was observed along these boundaries. By controlling the biasing parameters, the earliest stages of corrosion were directly observed. The results indicate that highly localized corrosion was caused by inclusion dissolution along dislocation cell boundaries, and more widespread corrosion initiated at the dislocation cell boundaries and spread throughout the dislocation networks.
Article
Engineering, Mechanical
Feng He, Chao Wang, Bin Han, Guma Yeli, Xin Lin, Zhijun Wang, Lilin Wang, Ji-jung Kai
Summary: The selective laser melted (SLM) 316L stainless steel (316L SS) has superior tensile ductility and doubled yield strength compared to its wrought counterpart. The improved yield strength is attributed to unique cellular substructures featured by Cr/Mo-segregation and trapped dislocations. The excellent ductility is mainly understood from deformation twinning and two newly discovered deformation mechanisms, deformation faulting and dislocation cell refinement, which dominate the whole tensile deformation significantly.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Acoustics
Madderla Sandhya, D. Ramasamy, K. Sudhakar, K. Kadirgama, W. S. W. Harun
Summary: The optimum ultrasonication time plays a crucial role in enhancing the heat transfer performance of nanofluids, affecting their dispersion and stability in base fluids. Various preparation techniques can influence the thermophysical properties of nanofluids, with ultrasonication method being a highly effective approach to improve dispersion and thermal conductivity.
ULTRASONICS SONOCHEMISTRY
(2021)
Review
Green & Sustainable Science & Technology
Madderla Sandhya, D. Ramasamy, K. Sudhakar, K. Kadirgama, M. Samykano, W. S. W. Harun, G. Najafi, M. Mofijur, Mohamed Mazlan
Summary: Graphene has garnered much attention for its enhanced properties, particularly in thermal conductivity and heat transfer characteristics. Graphene nanofluids exhibit high thermal conductivity and stability, with significant enhancements in thermal conductivity and viscosity. The review article provides a detailed analysis of preparation techniques, characterization methods, stability evaluation, and thermal properties enhancements of Graphene nanofluids.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
M. Sandhya, D. Ramasamy, K. Sudhakar, K. Kadirgama, W. S. W. Harun
Summary: The research focuses on graphene-based nanofluids with high thermal conductivity, utilizing graphene and graphene oxide nanofluids for simulation analysis. The results indicate that inserting louvered strips in the radiator tube can enhance heat transfer efficiency.
JOURNAL OF THERMAL ENGINEERING
(2021)
Review
Energy & Fuels
Abu Shadate Faisal Mahamude, Muhamad Kamal Kamarulzaman, Wan Sharuzi Wan Harun, Kumaran Kadirgama, Devarajan Ramasamy, Kaniz Farhana, Rosli Abu Bakar, Talal Yusaf, Sivarao Subramanion, Belal Yousif
Summary: This paper studies the application of hybrid nanofluids in solar energy systems and finds that they can enhance heat transfer efficiency and replace traditional heat transfer fluids. The research also introduces preparation methods, stability factors, thermal improvement methods, and current applications of hybrid nanofluids, as well as mathematical regression analysis. Hybrid nanofluids have excellent thermophysical properties and have the potential to improve the efficiency of solar collectors.
Article
Green & Sustainable Science & Technology
Navid Aslfattahi, Reyhaneh Loni, Evangelos Bellos, Gholamhassan Najafi, K. Kadirgama, W. S. W. Harun, R. Saidur
Summary: This research investigates the use of a novel high-efficiency nanofluid in a solar dish concentrator using a numerical model. Different concentrations of soybean oil-based MXene nanofluid were evaluated, demonstrating excellent thermal properties suitable for solar thermal applications. The study analyzed three different cavity receivers and found that the hemispherical shape led to maximum thermal efficiency with the nanofluid, showing potential for enhanced solar collector performance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Materials Science, Multidisciplinary
Basel Almuallim, W. S. W. Harun, Ihab Jabbar Al Rikabi, Hussein A. Mohammed
Summary: This review presents the principles of designing high thermal conductive polymer nanocomposites and summarizes the factors affecting thermal conductivity. It also explores the potential applications of polymer nanocomposites in AM technologies.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
M. Sandhya, D. Ramasamy, K. Kadirgama, W. S. W. Harun, R. Saidur
Summary: Nanofluids prepared with Graphene nanoplatelets and CNC dispersed in a base fluid exhibit excellent colloidal stability and have the potential to replace traditional heat transfer fluids, leading to efficient and compact thermal structures.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Abu Shadate Faisal Mahamude, Wan Sharuzi Wan Harun, Kumaran Kadirgama, Kaniz Farhana, D. Ramasamy, L. Samylingam, Navid Aslfattahi
Summary: Several studies have investigated the use of various nanomaterials in solar collectors, with this study focusing on the thermal performance of graphene nanofluid and hybrid nanofluid. Graphene nanoparticles have been shown to significantly enhance the thermo-physical properties of working fluids, improving the efficiency of solar collectors. The stable properties and improved heat transfer capacity of graphene nanofluids make them ideal for use in medium-temperature systems like solar collectors.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Abu Shadate Faisal Mahamude, Wan Sharuzi Wan Harun, Kumaran Kadirgama, Devarajan Ramasamy, Kaniz Farhana, Khalid Salih, Talal Yusaf
Summary: Flat plate solar collectors are the most widely studied alternative energy technology, and using nanomaterials can improve their thermal performance.
Review
Automation & Control Systems
Kumaresan Rajan, Mahendran Samykano, Kumaran Kadirgama, Wan Sharuzi Wan Harun, Md Mustafizur Rahman
Summary: In recent years, 3D printing technology has been crucial in fabricating customized products in various industrial sectors at a low cost and faster speed. Among the techniques, fused deposition modeling (FDM) stands out as one of the most efficient and economical methods. Researchers have been expanding the range of materials and optimizing the FDM process parameters to extend its applications.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Review
Engineering, Manufacturing
Minhalina Ahmad Buhairi, Farhana Mohd Foudzi, Fathin Iliana Jamhari, Abu Bakar Sulong, Nabilah Afiqah Mohd Radzuan, Norhamidi Muhamad, Intan Fadhlina Mohamed, Abdul Hadi Azman, Wan Sharuzi Wan Harun, M. S. H. Al-Furjan
Summary: This study investigates the effect of volumetric energy density (VED) on the morphology and properties of Ti6Al4V printed by laser powder bed fusion (LPBF). It is found that higher VED leads to smaller alpha' martensite size and larger columnar beta grain, lower surface roughness, as well as higher microhardness and tensile strength.
PROGRESS IN ADDITIVE MANUFACTURING
(2023)
Review
Engineering, Manufacturing
L. Sandanamsamy, W. S. W. Harun, I. Ishak, F. R. M. Romlay, K. Kadirgama, D. Ramasamy, S. R. A. Idris, F. Tsumori
Summary: Fused Deposition Modelling (FDM) is a widely used additive manufacturing technique that utilizes polylactic acid as the main material. This review explores the properties of polylactic acid and the influence of processing parameters on the quality of FDM-printed parts. It also highlights the importance of filler reinforcement to enhance the mechanical properties of polylactic acid. Additionally, the review emphasizes the potential industrial applications of polylactic acid due to its excellent thermoplastic and biodegradability properties.
PROGRESS IN ADDITIVE MANUFACTURING
(2022)
Review
Polymer Science
J. Mogan, W. S. W. Harun, K. Kadirgama, D. Ramasamy, F. M. Foudzi, A. B. Sulong, F. Tarlochan, F. Ahmad
Summary: Additive manufacturing (AM) is important for developing complex and efficient parts, with fused deposition modeling (FDM) being the most commonly used method for polymer product fabrication. However, FDM has limitations in terms of weak mechanical properties and poor surface quality, which restrict the types of polymer materials that can be produced and affect its structural applications. This review aims to systematically document critical information on FDMed-polymer composite processing for part fabrication. Based on a literature review of over 150 high-impact research articles published from 2011 to 2021, this review covers the use of base and filler materials, as well as process parameters such as layer height, nozzle temperature, bed temperature, and screw type. FDM is widely used in biomedical, automotive, and other manufacturing industries, making this study an essential reference for future research in FDMed-polymeric composites.
Article
Thermodynamics
M. Sandhya, D. Ramasamy, K. Kadirgama, W. S. W. Harun, R. Saidur
Summary: This article comprehensively investigates the preparation and thermophysical properties of single and hybrid nanofluids. It characterizes nanoparticles using various analytical techniques and measures the thermal conductivity, viscosity, density, and specific heat capacity of the nanofluids. The study finds that both single GNP nanofluids and hybrid nanofluids exhibit favorable thermal properties and can be considered as alternatives to conventional/water-based fluids in operational systems.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2023)
Review
Green & Sustainable Science & Technology
Talal Yusaf, Abu Shadate Faisal Mahamude, Kaniz Farhana, Wan Sharuzi Wan Harun, Kumaran Kadirgama, Devarajan Ramasamy, Mohd Kamal Kamarulzaman, Sivarao Subramonian, Steve Hall, Hayder Abed Dhahad
Summary: Graphene, with its unique properties and wide range of applications, has attracted global attention. Researchers are exploring the potential applications of graphene in various fields and aiming to bring it into the science, technology, and commercial markets.
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)
