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Microstructure and Shear Properties Evolution of Minor Fe-doped SAC/Cu Substrate Solder Joint under Isothermal Aging

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1279-1290页

作者： Quanzhen Li Chengming Li Xiaojing Wang Shanshan Cai Jubo Peng Shujin Chen Jiajun Wang Xiaohong Yuan Jiangsu University of Science and technology Zhenjiang212003China r&d center Yunnan Tin Group(Holding)Co.LtdKunming650000China The 58 Research Institute of China Electronics Technology Group CorporationWuxi214100China Yunnan Precious Metals Lab Sino-Platinum Metals Co.LtdKunming650156China

different amounts of Fe(0.005,0.01,0.03,0.05,and 0.07 wt%)were added to SAC305 to study the shear behavior damage of Fe-doped SAC solder joints under thermal loading(170℃,holding time of 0,250,500,and 750 h).The results show that during isothermal aging at 170℃,the average shear force of all solder joints decreases with increasing aging time,while the average fracture energy first increases and then decreases,reaching a maximum at 500 *** Fe doping could both increase shear forces and related fracture energy,with the optimum Fe doping amount being 0.03 wt%within the entire aging *** is because the doping Fe reduces the undercooling of the SAC305 alloy,resulting in the microstructure refining of solder *** in turn causes the microstructure changing from network structure(SAC305 joint:eutectic network+β-Sn)to a single matrix structure(0.03Fe-doped SAC305 joint:β-Sn matrix+small compound particles).Specifically,Fe atoms can replace some Cu in Cu_(6)Sn_(5)(both inside the solder joint and at the interface),and then form(Cu,Fe)_(6)Sn_(5) compounds,resulting in an increase in the elastic modulus and nanohardness of the ***,the growth of Cu_(6)Sn_(5) and Cu_(3)Sn intermetallic compounds(IMC)layer are inhibited by Fe doping even after the aging time prolonging,and Fe aggregates near the interface compound to form FeSn_(2).This study is of great significance for controlling the growth of interfacial compounds,stabilizing the microstructures,and providing strengthening strategy for solder joint alloy design.

关键词： SAC305 solder Fe doping Shear mechanical behavior Isothermal aging Interfacial intermetallic compounds(IMC)

Highly Flexible Graphene-Film-Based rectenna for Wireless Energy Harvesting

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Energy & Environmental Materials 2024年第2期7卷 324-329页

作者： Jingwei Zhang Yuchao Wang rongguo Song Zongkui Kou daping He Hubei Engineering research center of rF-Microwave technology and Application School of Science Wuhan University of Technology Sanya Science and Education Innovation Park of Wuhan University of technology State Key Laboratory of Advanced technology for Materials Synthesis and processing Wuhan University of Technology

Herein, we report the design, fabrication, and performance of two wireless energy harvesting devices based on highly flexible graphene macroscopic films（FGMFs）. We first demonstrate that benefiting from the high conductivity of up to 1 × 10～6S m-1and good resistive stability of FGMFs even under extensive bending, the FGMFs-based rectifying circuit（GrC）exhibits good flexibility and rF-to-dC efficiency of 53% at 2.1 GHz. Moreover,we further expand the application of FGMFs to a flexible wideband monopole rectenna and a 2.45 GHz wearable rectenna for harvesting wireless energy. The wideband rectenna at various bending conditions produces a maximum conversion efficiency of 52%, 46%, and 44% at the 5th Generation（5G） 2.1 GHz, Industrial Long-Term Evolution（LTE） 2.3 GHz, and Scientific Medical（ISM） 2.45 GHz, respectively. A 2.45 GHz GrC is optimized and integrated with an AMC-backed wearable antenna. The proposed 2.45 GHz wearable rectenna shows a maximum conversion efficiency of 55.7%. All the results indicate that the highly flexible graphene-film-based rectennas have great potential as a wireless power supplier for smart Internet of Things（Io T） applications.

关键词： flexible rectennas highly flexible graphene-based films wireless energy harvesting

In-situ polymerized PEO-based solid electrolytes contribute better Li metal batteries:Challenges,strategies,and perspectives

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Journal of Energy Chemistry 2024年第5期92卷 548-571页

作者： Zhihui Jia Yong Liu Haoming Li Yi Xiong Yingjie Miao Zhongxiu Liu Fengzhang ren School of Materials Science and Engineering Henan Key Laboratory of Non-Ferrous Materials Science&Processing TechnologyHenan University of Science and TechnologyLuoyang 471023HenanChina Provincial and Ministerial Co-construction of Collaborative Innovation center for Non-ferrous Metal new Materials and Advanced processing technology Henan University of Science and TechnologyLuoyang 471023HenanChina

Polyethylene oxide(PEO)-based solid polymer electrolytes(SPEs)with good electrochemical stability and excellent Li salt solubility are considered as one of the most promising SPEs for solid-state lithium metal batteries(SSLMBs).However,PEO-based SPEs suffer from low ionic conductivity at room temperature and high interfacial resistance with the electrodes due to poor interfacial contact,seriously hindering their practical *** an emerging technology,in-situ polymerization process has been widely used in PEO-based SPEs because it can effectively increase Li-ion transport at the interface and improve the interfacial contact between the electrolyte and ***,we review recent advances in design and fabrication of in-situ polymerized PEO-based SPEs to realize enhanced performance in *** merits and current challenges of various SPEs,as well as their stabilizing strategies are ***,various in-situ polymerization methods(such as free radical polymerization,cationic polymerization,anionic polymerization)for the preparation of PEO-based SPEs are *** addition,the application of in-situ polymerization technology in PEO-based SPEs for adjustment of the functional units and addition of different functional filler materials was systematically discussed to explore the design concepts,methods and working ***,the challenges and future prospects of in-situ polymerized PEO-based SPEs for SSLMBs are also proposed.

关键词： In-situ polymerization Polyethylene oxide Solid polymer electrolytes Lithium metal anodes

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Exploring the taste presentation and receptor perception mechanism of salty peptides from Stropharia rugosoannulata based on molecular dynamics and thermodynamics simulation

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Food Science and Human Wellness 2024年第4期13卷 2277-2288页

作者： Wen Li Shuai Sun Wanchao Chen Haile Ma Tingzhao Li Zhong Zhang di Wu Mengqiu Yan Yan Yang Institute of Edible Fungi Shanghai Academy of Agricultural SciencesNational Engineering Research Center of Edible FungiKey Laboratory of Edible Fungi Resources and Utilization(South)Ministry of Agriculture and Rural AffairsShanghai 201403China School of Food&Biological Engineering Institute of Food Physical ProcessingJiangsu UniversityZhenjiang 212013China Amway(Shanghai)Innovation&Science Co. Ltd.Shanghai 201203China Amway(China)Botanical r&d center Wuxi 214115China

The taste presentation and receptor perception mechanism of the salty peptide of Stropharia rugosoannulata were predicted and verified using peptide omics and molecular interaction *** combination of aspartic acid(d)and glutamic acid(E),or peptide fragments composed of arginine(r),constitute the characteristic taste structural basis of salty peptides of *** taste intensity of the salty peptide positively correlates with its concentration within a specific concentration range(0.25–1.0 mg/mL).The receptor more easily recognizes the first amino acid residue at the N-terminal of salty peptides and the aspartic acid residue in the ***513,ASP707,and VAL508 are the critical amino acid residues for the receptor to recognize salty ***1 is specifically the receptor for recognizing salty *** bonds and electrostatic interactions are the main driving forces for the interactions between salty peptides and TrPV1 *** has the most potent binding capacity with the receptor and has tremendous potential for application in sodium salt *** study confirmed the taste receptor that specifically recognizes salty peptides,analyzed the receptor-peptide binding interaction,and provided a new idea for understanding the taste receptor perception of salty peptides.

关键词： Salty peptide Molecular docking Biolayer interferometry Isothermal titration calorimetry

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dynamic Location Method for Shallow Ocean Bottom Nodes Using the Levenberg-Marquart Algorithm

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Journal of Ocean University of China 2024年第4期23卷 953-960页

作者： TONG Siyou LI Junjie XU Xiugang FANG Yunfen WANG Zhongcheng Key Laboratory of Submarine Geosciences and Prospecting Techniques MOEOcean University of ChinaQingdao 266100China Laboratory for Marine Mineral resources Qingdao Marine Science and Technology CenterQingdao 266237China r&d center of BGP CNPCZhuozhou 072751China Insitute of Shengli Oilfield SINOPECDongying 257022China

Ocean bottom node(OBN)data acquisition is the main development direction of marine seismic exploration;it is widely promoted,especially in shallow sea ***,the OBN receivers may move several times because they are easily affected by tides,currents,and other factors in the shallow sea environment during long-term *** uncorrected,then the imaging quality of subsequent processing will be *** conventional secondary positioning does not consider the case of multiple movements of the receivers,and the accuracy of secondary positioning is *** first arrival wave of OBN seismic data in shallow ocean mainly comprises refracted *** this study,a nonlinear model is established in accordance with the propagation mechanism of a refracted wave and its relationship with the time interval curve to realize the accurate location of multiple receiver *** addition,the Levenberg-Marquart algorithm is used to reduce the influence of the first arrival pickup error and to automatically detect the receiver movements,identifying the accurate dynamic relocation of the *** simulation and field data show that the proposed method can realize the dynamic location of multiple receiver movements,thereby improving the accuracy of seismic imaging and achieving high practical value.

关键词： OBN dynamic location method Levenberg-Marquart algorithm seismic exploration of shallow sea

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Oncology research 2024年第2期32卷 421-432页

作者： SEUNG-HEE GWAK JUHYUN LEE EUNJI OH dOHYUN LEE WONSHIK HAN JONGMIN KIM KYONG-TAI KIM department of Life Sciences Pohang University of Science and TechnologyPohang37673Korea r&d center NovMetaPharma Co.Ltd.Pohang37668Korea department of Surgery and Cancer research Institute Seoul National University College of MedicineSeoul03080Korea Generative Genomics research center Global Green Research&Development CenterHandong Global UniversityPohang37554Korea

Genetic information is transcribed from genomic dNA to mrNA,which is then translated into threedimensional *** can undergo various post-transcriptional modifications,including rNA editing that alters mrNA sequences,ultimately affecting protein *** this study,rNA editing was identified at the 499th base(c.499)of human vaccinia-related kinase 2(VrK2).This rNA editing changes the amino acid in the catalytic domain of VrK2 from isoleucine(with adenine base)to valine(with guanine base).Isoleucine-containing VrK2 has higher kinase activity than the valine-containing VrK2,which leads to an increase in tumor cell *** we reported that VrK2 directly interacts with dystrobrevin-binding protein(dysbindin)and results in reducing its ***,we demonstrate that isoleucine-containing VrK2 decreases the level of dysbindin than valinecontaining *** interacts with cyclin d and thereby regulates its expression and *** reduction in the level of dysbindin by isoleucine-containing VrK2 further enhances the cyclin d expression,resulting in increased tumor growth and reduction in survival *** has also been observed that in patient samples,VrK2 level was elevated in breast cancer tissue compared to normal breast ***,the isoleucine form of VrK2 exhibited a greater increase in breast cancer ***,it is concluded that VrK2,especially dependent on the 167th variant amino acid,can be one of the indexes of tumor progression and proliferation.

关键词： VrK2 Kinase activity Breast cancer Tumor rNA editing Cell proliferation Cell growth

Inhibiting Voltage decay in Li-rich Layered Oxide Cathode:From O3-Type to O2-Type Structural design

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Nano-Micro Letters 2024年第12期16卷 81-102页

作者： Guohua Zhang Xiaohui Wen Yuheng Gao renyuan Zhang Yunhui Huang Institute of New Energy for Vehicles Shanghai Key Laboratory for R&D and Application of Metallic Functional MaterialsSchool of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China Contemporary Amperex technology Co. LtdNingde 352100People’s Republic of China State Key Laboratory of Material processing and die and Mould technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiPeople’s Republic of China

Li-rich layered oxide(LrLO)cathodes have been regarded as promising candidates for next-generation Li-ion batteries due to their exceptionally high energy density,which combines cationic and anionic redox ***,continuous voltage decay during cycling remains the primary obstacle for practical applications,which has yet to be fundamentally *** is widely acknowledged that voltage decay originates from the irreversible migration of transition metal ions,which usually further exacerbates structural evolution and aggravates the irreversible oxygen redox ***,constructing O2-type structure has been considered one of the most promising approaches for inhibiting voltage *** this review,the relationship between voltage decay and structural evolution is systematically *** to suppress voltage decay are systematically ***,the design of O2-type structure and the corresponding mechanism of suppressing voltage decay are comprehensively ***,the reported O2-type LrLO cathodes still exhibit partially disordered structure with extended ***,the factors that may cause the irreversible transition metal migrations in O2-type LrLO materials are also explored,while the perspectives and challenges for designing high-performance O2-type LrLO cathodes without voltage decay are proposed.

关键词： Lithium-ion batteries Li-rich layered oxide Voltage decay Migration of transition metal ions O2-type structural design

Semantic segmentation via pixel-to-center similarity calculation

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CAAI Transactions on Intelligence technology 2024年第1期9卷 87-100页

作者： dongyue Wu Zilin Guo Aoyan Li Changqian Yu Nong Sang Changxin Gao national Key Laboratory of Science and technology on Multispectral Information processing School of Artificial Intelligence and AutomationHuazhong University of Science and TechnologyWuhanChina Meituan Inc. BeijingChina

Since the fully convolutional network has achieved great success in semantic segmentation,lots of works have been proposed to extract discriminative pixel ***,the authors observe that existing methods still suffer from two typical challenges:(i)The intra-class feature variation between different scenes may be large,leading to the difficulty in maintaining the consistency between same-class pixels from different scenes;(ii)The inter-class feature distinction in the same scene could be small,resulting in the limited performance to distinguish different classes in each *** authors first rethink se-mantic segmentation from a perspective of similarity between pixels and class *** weight vector of the segmentation head represents its corresponding semantic class in the whole dataset,which can be regarded as the embedding of the class ***,the pixel-wise classification amounts to computing similarity in the final feature space between pixels and the class *** this novel view,the authors propose a Class center Similarity(CCS)layer to address the above-mentioned challenges by generating adaptive class centers conditioned on each scenes and supervising the similarities between class *** CCS layer utilises the Adaptive Class center Module to generate class centers conditioned on each scene,which adapt the large intra-class variation between different *** designed Class distance Loss(Cd Loss)is introduced to control both inter-class and intra-class distances based on the predicted center-to-center and pixel-to-center ***,the CCS layer outputs the processed pixel-to-center similarity as the segmentation *** experiments demonstrate that our model performs favourably against the state-of-the-art methods.

关键词： computer vision deep neural networks image segmentation scene understanding

Laser Powder Bed Fusion of Beta-Type Titanium Alloys for Biomedical Application:A review

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Acta Metallurgica Sinica(English Letters) 2024年第1期37卷 17-28页

作者： Xuan Luo Chao Yang dongdong Li Lai-Chang Zhang State Key Laboratory of Materials processing and die&Mould technology Huazhong University of Science and TechnologyWuhan430074China national Engineering research center of Near-Net-Shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou510640China Centre for Advanced Materials and Manufacturing School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupPerthWA6027Australia

Additive manufacturing ofβ-type titanium alloy is expected to replace Ti-6Al-4V alloy in the field of orthopedic implantation because of their low elastic modulus,excellent corrosion resistance,and *** briefly introducing the laser powder bed fusion(LPBF)process and physical phenomena,this paper reviews the recent progresses in LPBF-edβ-type Ti *** strategies to strengthening and tougheningβ-type Ti alloys are critically *** is followed by the processing routes employed to achieve to low modulus for orthopedic applications,especially a new methodology for tailoring crystallographic orientation called multi-track coupled directional *** effect of processing and compositions on performance metrics ofβ-type Ti alloys included corrosion behavior,and biocompatibility is *** the end,challenges in additive manufacturing ofβ-type Ti alloys in future are highlighted,with the aim to ensue clinical application of LPBF-edβ-type Ti alloys.

关键词： β-type Ti alloys Laser powder bed fusion Mechanical properties Elastic modulus Biocompatibility