Article
Chemistry, Physical
Md Sazzad Hossain, Lisa Stephens, Janine Mauzeroll, Steen B. Schougaard
Summary: Scanning electrochemical microscopy (SECM) is a useful technique for characterizing the diffusion coefficients in porous media, with a transitional frontier from hemispherical to cylindrical diffusion. Experimental parameters were examined through simulations to derive a best practice thickness criterium and found an empirical formulation in the response below a certain thickness limit. This analysis solidifies SECM as a reliable tool for characterizing mass transport in porous films over a wide range of thicknesses.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Ceramics
O. V. Sreejith, Murugan Ramaswamy
Summary: The study reveals that the lithium-ion diffusion kinetics in lithium titanate can be significantly improved through germanium incorporation, leading to enhanced electrochemical performance and increased discharge capacity of the battery.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Fuqian Yang
Summary: This work investigates the lithiation-induced swelling and deformation of three different electrode shapes under the framework of linear elasticity. The study reveals a linear relationship between lithium concentration and hydrostatic stress for all three electrode shapes. It is found that the lithium-induced swelling is proportional to the partial molal volume of lithium and the state of charge, and the swelling rate decreases over time. The constraint and geometrical shape of the electrode play crucial roles in controlling the swelling and stress evolution.
JOURNAL OF ENERGY STORAGE
(2024)
Article
Engineering, Multidisciplinary
Xiaofei Wang, Qi Tong
Summary: By using a concurrently-coupled and multi-physical model based on peridynamics, we have successfully simulated the delayed fracture in electrodes of lithium-ion batteries under mechanical and chemical loads, and revealed the key mechanisms during the fracture process, providing a useful tool for the design of lithium-ion batteries.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Chemistry, Physical
Florian Rittweger, Christian Modrzynski, Valentin Roscher, Dmitry L. Danilov, Peter H. L. Notten, Karl-Ragmar Riemschneider
Summary: The study investigates the lithium-ion dynamics in lithium iron phosphate based positive electrodes using optical in situ methods. By analyzing the change in reflectivity during charge and discharge processes, apparent diffusion coefficients for the lithiation and delithiation of the electrode are estimated. The addition of conductive and electrochromic marker additives enhances the visibility of optical effects in the cathodes without altering their electrical properties.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Yasushi Idemoto, Kota Shima, Chiaki Ishibashi, Naoya Ishida, Naoto Kitamura
Summary: The rate dependence of the average crystal and electronic structure of a 0.5Li(2)MnO(3)-0.5LiMn(10/24)Ni(7/24)Co(7/24)O(2) electrode was investigated. The electrode exhibited high capacity in the first discharge process at a low rate, but the capacity decreased at higher rates. The migration of transition metals and higher distortion of MO6 after multiple cycles were found to be the reasons for the capacity decrease.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Construction & Building Technology
Florian R. Steindl, Florian Mittermayr, Marlene Sakoparnig, Joachim Juhart, Lukas Briendl, Benedikt Lindlar, Neven Ukrainczyk, Martin Dietzel, Wolfgang Kusterle, Isabel Galan
Summary: In this study, the effects of the spraying process, setting accelerator addition, and mix design on the microstructure of shotcrete were investigated. A deconvolution analysis of the pore size distributions was used to determine the critical and median pore diameter parameters with increased precision. Results showed that the dry-mix shotcrete had coarser pore sizes compared to wet-mix shotcrete, and combinations of different supplementary cementitious materials favored refined pore structures in wet-mix shotcretes. The addition of setting accelerators and the spraying process caused systematic variations in the pore volume and structure of paste and shotcrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Adam M. Boyce, Xuekun Lu, Dan J. L. Brett, Paul R. Shearing
Summary: This study establishes an advanced tool using X-ray nano-computed tomography imaging, morphological image processing techniques, and a coupled electrochemical model to digitally alter electrode microstructures and assess the impact of thickness, porosity, and discharge rate on electrode performance. The model shows high levels of heterogeneity in lithium, lithium-ion, and current density distributions across the electrode, highlighting the significant and inextricable link between thickness, porosity, and discharge rate.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Zhaohui Wu, Haodong Liu, Sicen Yu, Ping Liu
Summary: The choice of binder significantly affects the cycling performance of thick SPAN cathodes, with CMC improving capacity retention. Binder optimization also enables stable cycling of low porosity cathodes. This work highlights the importance of binder selection for thick SPAN cathodes and opens up possibilities for high energy density Li-SPAN cells.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Jinkun Wang, Yun Gao, Jianhong Liu, Li Wang, Hong Xu, Yang Yang, Huaihe Song, Bo Zhang, Xiangming He
Summary: In this study, Li-rich Li2.24SrTi6-xZrxO14 materials with different Zr doping amounts were synthesized and the effect of Zr4+ doping on the properties of Li2.24SrTi6O14 was investigated. The results show that Zr4+ doping can effectively inhibit grain growth, improve the diffusion coefficient of Li+ in the material, and enhance high-rate charge-discharge performance. The optimal doping ratio is x = 0.1, with a capacity retention of 82.9% at 10C/1C. Excessive Zr4+ doping is harmful to the capacity and rate performance of the anode.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Wenlong Huang, Jiaxin Peng, Jie Li, Xueyang Hou, Xingliang Zhang, Zhao Fang
Summary: The hydrothermally treated aluminum electrolysis spent cathode (SC) shows excellent electrochemical performance, with a calculated Li+ diffusion coefficient of 2.2292 x 10(-11) cm(2) s(-1) by CV analysis. The SC electrode exhibits better Li+ diffusion kinetics compared to commercial graphite (CG), leading to a high discharge capacity and capacity retention in the full cell of LiNi0.5Co0.2Mn0.3O2/SC.
Article
Engineering, Environmental
Ling Bai, Zeliang Guan, Jingjing Nie, Binyang Du
Summary: A novel host material for sulfur cathode, porous carbon decorated with NiCo2O4 nanoparticles, was designed and prepared in this study. The synergistic effects between carbon and NiCo2O4 nanoparticles resulted in strong adsorption for lithium polysulfides, alleviating the shuttle effect and promoting the catalytic conversion process. This work provides new insights into the optimization of carbonaceous architecture for regulating polysulfide redox reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Madhushri Bhar, Sourav Ghosh, Surendra K. Martha
Summary: In this study, a carbon fiber-based freestanding electrode architecture was proposed, which effectively reduced pulverization and conductivity issues by embedding Fe2O3 nanoparticles on the carbon fiber network. The freestanding electrode exhibited an enhanced initial capacity and improved cycling stability compared with the conventional Fe2O3 electrode. The carbon fiber network provided a conductive backbone for ionic and electronic transport, and the electrode showed good electrochemical stability during repeated sodiation/desodiation processes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Tatiana Kulova, Dmitri Gryzlov, Alexander Skundin, Ilia Gavrilin, Yulia Kudryashova, Nicolai Pokryshkin
Summary: Germanium phosphide (GeP) is synthesized by evaporating and condensing red phosphorus on the surface of germanium nanowires pre-grown on a titanium substrate. The synthesized GeP is capable of reversibly inserting lithium and sodium, with lithium and sodium having effective diffusion coefficients in germanium phosphide that differ 2 orders of magnitude.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Electrochemistry
Thomas Beuse, Mathias Fingerle, Christian Wagner, Martin Winter, Markus Boerner
Summary: Porosity is not only a value used to describe the microstructure of a battery electrode, but also a key parameter for battery electrode performance and mechanical properties. This study emphasizes the importance of using multiple methods to describe electrode microstructure and understanding the advantages and limitations of each analytical technique.
Article
Energy & Fuels
Nanny Strzelczyk, Laura Gottschalk, Jannes Muller, Arno Kwade
Summary: High energy density lithium-ion batteries are the focus of current research, with the main challenge being fast charging capability. A study on blend anodes of graphite and hard carbon revealed that combining these materials can enhance lithium-ion diffusion and capacity retention.
Article
Chemistry, Applied
Timon R. Heyn, Marcel Schrader, Ingo Kampen, Arno Kwade, Karin Schwarz, Julia K. Keppler
Summary: In this study, beta-lactoglobulin solutions were mechanically stressed using glass beads at high temperatures and low pH value to investigate the effect of mechanical stressing and surfaces on amyloid aggregation kinetics. The findings provide valuable insights into the role of specific mechanical factors in facilitating the assembly of building blocks for efficient production of functional amyloid aggregates. The use of different diameters of glass beads and shaking frequencies allowed for the manipulation of mechanical stress energy, which was quantified using CFD-DEM simulations. Surface effects were examined by modifying the hydrophobicity and surface roughness of the glass beads. The analysis of amyloid aggregates and bead surfaces was performed using ThT-assay, AFM, and ATR-FTIR techniques.
FOOD HYDROCOLLOIDS
(2023)
Article
Energy & Fuels
Marcel Weber, Alexander Schoo, Marie Sander, Julian K. Mayer, Arno Kwade
Summary: The demand for electrochemical storage systems is increasing, particularly in mobile applications and power generation. The lithium-ion battery is widely used due to its low weight and high energy density. Battery cell production involves a complex process chain with specific requirements for each step. Understanding the potential effects of different process parameters and their relationship with product properties is crucial. This study investigates the application of spectrophotometry in lithium-ion battery production to establish a correlation between intermediate product properties and measured color values.
Article
Pharmacology & Pharmacy
Daniel Puckhaber, Anna-Lena Voges, Supriya Rane, Sarah David, Bindhumadhavan Gururajan, Jan Henrik Finke, Arno Kwade
Summary: Modeling the structural and mechanical properties of tablets with multiple components using minimal experimental data is of great interest to minimize time and cost in the development of new tablet formulations. Most available models use compressibility and compactibility of constituent components and mixing rules to predict tablet properties. However, these models are limited to single materials, excluding lubricants. This study combines compaction and lubrication models to systematically predict properties of lubricated multi-component tablets.
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
(2023)
Article
Pharmacology & Pharmacy
Kostas Giannis, Arno Kwade, Jan Henrik Finke, Carsten Schilde
Summary: The aim of this study was to investigate the deformation behavior of non-spherical particles during high-load compaction using the multi-contact discrete element method (MC-DEM). The bonded multi-sphere method (BMS), which incorporates intragranular bonds between particles, and the conventional multi-sphere (CMS), where overlaps between particles are allowed to form a rigid body, were used. The results showed that the BMS method was able to handle large elastic deformations and achieved good agreement with experimental data, while the CMS approach had limitations in capturing the compression behavior of a single rubber sphere.
Article
Pharmacology & Pharmacy
Karl Vorlaender, Lukas Bahlmann, Arno Kwade, Jan Henrik Finke, Ingo Kampen
Summary: This study investigates the drying of yeast Saccharomyces cerevisiae via fluidized bed spray granulation and finds that lactose is the most effective carrier material for maintaining microbial viability.
Article
Electrochemistry
Florian S. Hoffmann, Florian Schmidt, Jannes Mueller, Kay Schoenherr, Susanne Doerfler, Thomas Abendroth, Holger Althues, Arno Kwade, Nae-Lih Wu, Stefan Kaskel
Summary: In this study, a new low density electrolyte based on hexyl methyl ether (HME) and 1,3-dioxalane (DOL) was introduced, which allows the use of graphite as anode material for Li-S batteries. By using symmetric graphite vs. graphite cells, an average Coulombic efficiency of 99.94% per electrode could be achieved. Furthermore, the cycling conditions for Li-S cells with graphite anodes were optimized for the first time, and the feasibility of the concept was demonstrated in multilayer pouch cells under realistic conditions.
BATTERIES & SUPERCAPS
(2023)
Article
Pharmacology & Pharmacy
Karl Vorlaender, Paula Pramann, Arno Kwade, Jan Henrik Finke, Ingo Kampen
Summary: In order to ensure the effectiveness of probiotic microorganisms when administered to patients in sufficient doses, dry dosage forms are preferred, particularly tablets. The drying process must be as gentle as possible. In this study, Saccharomyces cerevisiae was dried using spray drying and various additives and process parameters were investigated to improve yeast cell survival. The use of protective additives was found to be essential and the outlet temperature during drying determined the survival rate. Subsequent compression of the spray-dried yeast reduced viability, but tabletability of the yeast protectant particles was good, providing insights into cell inactivation during tableting.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Electrochemistry
Laura Helmers, Finn Frankenberg, Julian Brokmann, Christine Burmeister, Annika Buchheit, Arno Kwade, Peter Michalowski
Summary: To achieve the commercialization of solid-state batteries, further improvement in the properties of solid electrolytes is needed. The hybrid solid electrolyte approach, which combines different solid electrolyte classes, is being systematically investigated. However, mixing thiophosphate or oxide filler particles into the matrix does not improve the electrochemical properties. Silanization of the thiophosphate filler particles significantly increases the ionic conductivity, and the surface structure of the filler particles affects the overall conductivity of the hybrid solid electrolyte. These findings emphasize the importance of tailored filler design in solid-state battery applications.
Article
Electrochemistry
Mattis Batzer, Daniel Gundlach, Peter Michalowski, Arno Kwade
Summary: This article introduces the potential of sulfidic solid electrolytes as key elements of solid-state batteries. It also discusses the establishment of an extrusion process for scalable production of separators and cathode suspensions. Through systematic investigation, the article presents improved layers with better adhesive strength, ionic conductivity, and capacity. The Li3PS4-based separators show high ionic conductivity and specific capacity.
Article
Engineering, Chemical
Maike S. Wullenweber, Jonathan Kottmeier, Ingo Kampen, Andreas Dietzel, Arno Kwade
Summary: Deterministic lateral displacement (DLD) is a passive microfluidic separation method used to separate micron-scale particles based on their size. This study investigates the limitations of DLD under specific conditions by varying particle volume fractions and flow rates in the microsystem. Computational simulations were performed to evaluate the separation efficiency. The results suggest that by limiting the volume fraction to a maximum of 3.6%, the flow rate and separation efficiency can be increased.
Review
Engineering, Chemical
Christoph Thon, Marvin Roehl, Somayeh Hosseinhashemi, Arno Kwade, Carsten Schilde
Summary: Since the early 2010s, the field of artificial intelligence (AI) has been growing exponentially, with widespread applications in daily life and industry. In particle technology, there have been successful AI applications for predictive modeling, process control, fault recognition, and mechanistic modeling. However, there is still untapped potential for further adoption and productivity gains compared to other industries.
KONA POWDER AND PARTICLE JOURNAL
(2023)
Review
Engineering, Chemical
Arno Kwade, Marcel Moeller, Jannes Mueller, Jutta Hesselbach, Sabrina Zellmer, Stefan Doose, Julian Mayer, Peter Michalowski, Malcolm Powell, Sandra Breitung-Faes
Summary: This paper discusses the use of comminution processes and machines in the production of lithium-ion batteries, covering particle breakage, dispersing, and separation. It highlights the importance of raw material production and recycling in the battery manufacturing process, and the need for milling and classification in the synthesis of active materials. The paper also explores the use of mills and classifiers in designing graphite and producing nanosized silicon. Additionally, it emphasizes the dispersion of conductive additives using machines like planetary mixers and stirred media mills.
KONA POWDER AND PARTICLE JOURNAL
(2023)
Article
Chemistry, Physical
Marcella Horst, Julian K. Burmeister, Mozaffar Abdollahifar, Salavatore Pillitteri, Arno Kwade
Summary: This paper introduces a solvent-free low-cost dry coating process for manufacturing high load electrodes and investigates its impact on the performance of lithium-sulfur batteries. The electrodes fabricated through hot-pressing process exhibit high specific capacity and improved rate capability.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Florian S. Hoffmann, Florian Schmidt, Jannes Mueller, Kay Schoenherr, Susanne Doerfler, Thomas Abendroth, Holger Althues, Arno Kwade, Nae-Lih Wu, Stefan Kaskel
Summary: A new low density electrolyte based on hexyl methyl ether (HME) and 1,3-dioxalane (DOL) is presented in this study, which allows the use of graphite as anode material for Li-S batteries. The electrolyte showed a high Coulombic efficiency in graphite vs. graphite cells. Additionally, the cycling conditions for Li-S cells with graphite anodes were optimized for the first time.
BATTERIES & SUPERCAPS
(2023)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxin Zhong, Biao Zhang, Yuhan Ren, Jian Ye, Jiawei Zhang, Feng Ye
Summary: In this study, bioinspired web-liked multiphase composites were successfully constructed using boron-modified polysilazane polymer. The composites consisted of long TiB nanowires as 'web' and hybrid TiC and Ti3Si particles as 'nodes'. The enhanced strength of these composites was attributed to the synergistic load transfer of the hybrid reinforcements. This study provides a promising design approach for developing high-performance composites with high reinforcement content, utilizing polymer instead of traditional ceramic powder.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
