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High piezoelectricity after field cooling AC poling in temperature stable ternary single crystals manufactured by continuous-feeding Bridgman method

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Journal of Advanced Ceramics 2022年第1期11卷 57-65页

作者： Cong LUO Tomoaki KARAKI Zhuangkai WANG Yiqin SUN Yohachi(John)YAMASHITA Jiayue XU School of Materials Science and Engineering Shanghai Institute of TechnologyShanghai 201418China Department of Electrical and Computer Engineering Faculty of EngineeringToyama Prefectural UniversityToyama 939-0398Japan Department of Mechanical&Aerospace Engineering North Carolina State UniversityNC 27695-7910USA

After field cooling(FC)alternating current poling(ACP),we investigated the dielectric and piezoelectric properties of[001]_(pc)-oriented 0.24Pb(In_(1/2)Nb_(1/2))O_(3)(PIN)-0.46Pb(Mg_(1/3)Nb_(2/3))O_(3)(PMN)-0.30PbTiO3(PT)(PIMN-0.30PT)single crystals(SCs),which were manufactured by continuous-feeding Bridgman(CF BM)within morphotropic phase boundary(MPB)*** ACP with 4 kVrms/cm from 100 to 70℃,the PIMN-0.30PT SC attained high dielectric permittivity of 8330,piezoelectric coefficient(d_(33))of 2750 pC/N,bar mode electromechanical coupling factorκ_(33)of 0.96 with higher phase change temperature(T_(pc))of 103℃,and high Curie temperature(7c)of 180℃.These values are the highest ever reported as PIMN-xPT SC system with Tpc>100℃.The enhancement of these properties is attributed to the induced low symmetry multi-phase supported by phase *** work indicates that FC ACP is a smart and promising method to enhance piezoelectric properties of relaxor-PT ferroelectric SCs including PIMN-xPT,and provides a route to a wide range of piezoelectric device applications.

关键词： field cooling(FC)alternating current poling(ACP) PIMN-0.30PT high piezoelectricity

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Advancements in Titanium for Biomedical Applications: A Review of Recent Developments 2

Advancements in Titanium for Biomedical Applications: A Revi...

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2nd International Conference on Multidisciplinary engineering and Applied science, ICMEAS 2023

作者： Adeleke, Adekunle A. Ikubanni, Peter P. Lawal, Mohammed S. Ogedengbe, Temitayo Anosike-Francis, Esther Suleiman, Suleiman-Abba Daniel, Favour Chika Orhadahwe, Thomas Aghogho Odusote, Jamiu Kolawole Nile University of Nigeria Department of Mechanical Engineering Abuja Nigeria Landmark University Department of Mechanical Engineering Omu-Aran Nigeria Air Force Institute of Technology Department of Mechanical Engineering Kaduna Nigeria African University of Science and Technology Department of Mechanical Engineering Abuja Nigeria Ajayi Crowther University Department of Mechanical Engineering Oyo Nigeria University of Ilorin Department of Materials and Metallurgical Engineering Ilorin Nigeria

ISBN: (纸本)9798350358834

Titanium is an inorganic metallic element that has gained significant importance in various fields due to its exceptional biocompatibility, corrosion resistance, high strength-to-weight ratio, and low modulus of elasticity. These properties have made it a crucial material for improving the quality and durability of life. The chemical and physical characteristics of this element have demonstrated dependability and suitability in the fabrication of mechanical components and constructions that can be implanted within the human body. It has been demonstrated to be a viable option for the fabrication of medical instruments and equipment, particularly those utilised in surgical procedures. This review aims to provide an overview of the latest advancements in the utilization of titanium for biomedical purposes, while also emphasising the distinctive characteristics of titanium that render it an ideal material for medical equipment. © 2023 IEEE.

关键词： Biocompatibility

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Fragmentation of fuel pellets during transport via a belt conveyor:A design of experiment study

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Particuology 2022年第7期20卷 29-37页

作者： Hamid Gilvari Coen H.H.van Battum Richard Farnish Yusong Pang Wiebren de Jong Dingena L.Schott Section of Transport Engineering and Logistics Department of Maritime&Transport TechnologyFaculty of MechanicalMaritime and Materials EngineeringDelft University of TechnologyThe Netherlands Wolfson Centre for Bulk Solids Handling Technology Faculty of Engineering&ScienceUniversity of GreenwichUnited Kingdom Section of Large Scale Energy Storage(LSE) Department of Process&EnergyFaculty of MechanicalMaritime and Materials EngineeringDelft University of TechnologyThe Netherlands

This work investigates the proportion of generated fines in a pilot-scale experiment using a belt conveyor and commercial fuel *** this,a belt conveyor with a length of 3.1 m was used and operated at varying conditions:speeds,percentages of material loading on the belt,two combinations of the inclination angle of the belt and the falling height,and a different number of handling *** considered a design of experiments approach based on response surface methodology to investigate the effect of different conditions on the potential of fines ***,a comparison between the results of the belt conveyor and three common benchmark experimental approaches(tumbling box,rotary impact tester,and mechanical compression test)was *** show that the number of handling steps and the combined effect of drop height and inclination angle directly affected the fines ***,the tested belt speed range and the level of loading were of lower significance.A polynomial quadratic model was derived based on the regression analysis and showed a high accuracy to predict the proportion of ***,the tumbling box method showed good potential to predict the proportion of fines in a belt conveyor when transported several times.

关键词： Fuel pellets Breakage Belt conveyor Transport Design of experiment Box–Behnken design

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Impact of grain boundary energy anisotropy on grain growth

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Physical Review materials 2024年第9期8卷 093403页

作者： S. Kiana Naghibzadeh Zipeng Xu David Kinderlehrer Robert Suter Kaushik Dayal Gregory S. Rohrer Department of Civil and Environmental Engineering Department of Materials Science and Engineering Center for Nonlinear Analysis Department of Mathematical Sciences Department of Physics Department of Mechanical Engineering

A threshold dynamics model of grain growth that accounts for the anisotropy in the grain boundary energy has been used to simulate experimentally observed grain growth of polycrystalline Ni. The simulation reproduces several aspects of the observed microstructural evolution that are not found in the results of simulations assuming isotropic properties. For example, the relative areas of the lowest-energy twin boundaries increase as the grains grow and the average grain boundary energy decreases with grain growth. This decrease in energy occurs because the population of higher-energy grain boundaries decreases while the population of lower-energy boundaries increases as the total grain boundary area decreases. This phenomenon emerges from the assumption of anisotropic grain boundary energies without modification of the energy minimizing algorithm. These findings are consistent with the observation that, in addition to the decrease in grain boundary area, additional energy is dissipated during grain growth by a decrease in the average grain boundary energy.

关键词： Grain boundaries Microstructure Polycrystals Polycrystalline materials

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Unexpected creep behavior in a rejuvenated metallic glass

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Journal of materials science & Technology 2023年第32期163卷 140-149页

作者： J.P.Wu Y.Lin F.H.Duan Q.Chen H.T.Wang N.Li J.L.Wen J.Pan L.Liu Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Laboratory of Nanomaterials&Nanomechanics Department of Mechanical EngineeringCity University of Hong KongHong KongChina Wuhan National High Magnetic Field Center Huazhong University of Science and TechnologyWuhan 430074China Shenzhen Polytechnic Shenzhen 518055China

Rejuvenation,bringing metallic glasses(MGs)to the younger and higher energy states,provides an alternative avenue to explore the interplay between the property and microstructures of *** this study,the creep behavior of the Zr_(69.5)Cu_(12)Ni_(11)Al_(7.5)MGs was experimentally examined by controlling the energy state in terms of structural rejuvenation and thermal *** is found that compared to the as-cast counterpart,the annealed MG at a lower energy state exhibits a higher hardness,a smaller displacement,and a lower creep rate due to the decreased free volume and the inhibited activation of the shear transformation ***,the rejuvenated MG at a high energy state displays lower hardness and increased free volume content,yet it demonstrates superior creep resistance compared to its as-cast counterpart,which deviates from conventional *** unexpected phenomenon occurs as the initial high-content free volume annihilates during creep,and strain hardening takes precedence over strain softening as the prevailing process during creep deformation,leading to a superior creep performance in extremely rejuvenated MGs.

关键词： Metallic glass Energy state Rejuvenation Creep Strain-hardening

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Smart Operating Range Monitoring of Solar PV Cell with Integrated Phase Change materials by Using Solar Deep Learning Model

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Electric Power Components and Systems 2024年第11期52卷 2147-2158页

作者： Geetha, P. Ajitha, S. Jyothirmayi, M. Guha, Tapas Chaturvedi, Abhay Ganeshan, P. Taqui, Syed Noeman Al-Ammar, Essam A. Wabaidur, Saikh Mohammad Iqbal, Amjad Department of Electronics and Communication Engineering Sree Vidyanikethan Engineering College Andhra Pradesh Tirupati India Department of MCA Ramaiah Institute of Technology Karnataka Bengaluru India Department of Electronics and Instrumentation Engineering Ramaiah Institute of Technology Karnataka Bengaluru India Department of AI and ML Nitte Meenakshi Institute of Technology Karnataka Bengaluru India Department of Electronics & Communication Engineering GLA University Uttar Pradesh Mathura India Department of Mechanical Engineering Sri Eshwar Engineering College Tamilnadu Coimbatore India Department of VLSI Microelectronics Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Tamil Nadu Chennai India Department of Electrical Engineering College of Engineering King Saud University Riyadh Saudi Arabia Chemistry Department College of Science King Saud University Riyadh Saudi Arabia Department of Materials Technologies Faculty of Materials Engineering Silesian University of Technology Gliwice Poland

This research aims to demonstrate that a one-of-a-kind microencapsulated bio-based PCM may be utilized in the passive collection of solar energy in buildings. The research makes use of a PCM with thermal properties within the comfort zone but is also able to track the performance of solar photovoltaic panels. This allows the research to be more accurate. Because of this, the research can produce outcomes that are more accurate. After finishing the step before this one, the next thing that needs to be done is creating novel composite concrete panels. This step follows the completion of the phase before it. The outcomes of the mechanical and thermal tests served as the basis for determining the best composition of the concrete mix that should be used for making this panel. The method concludes with the construction of a test structure using composite walls as the primary building material. © 2023 Taylor & Francis Group, LLC.

关键词： Solar energy

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Unraveling the influence of Mo on the corrosion mechanism of Ni-advanced weathering steel in harsh marine atmospheric environments

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Journal of materials science & Technology 2024年第28期195卷 41-62页

作者： Gang Niu Rui Yuan Enmao Wang Xiaojia Yang Zhiying Liu Zhangyin Li Zhihui Zhang Na Gong Kun Li Baoxian Su Junhua Zhang Huibin Wu Xiaogang Li Lawrence E.Murr Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Str.1D-40237 DüsseldorfGermany Engineering Technology Research Institute Chery Automobile Co.Ltd.Wuhu 241006China Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A∗STAR)2 Fusionopolis WayInnovis#08-03Singapore 138634Republic of Singapore College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Department of Metallurgical Materials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX 79968USA

Ni-advanced weathering steel holds paramount importance in marine atmospheric environments,especially those with heightened Cl^(−)*** meticulous compositional design plays a crucial role in establishing a rust layer capable of withstanding intrusion by Cl^(−),making it imperative for the viability of coating-free weathering steel in marine atmospheric *** study explores the corrosion evolution and corrosion-resistant mechanisms within a steady-state rust layer in 3Ni weathering steel,with a particular focus on the role of Mo in challenging marine atmospheric *** findings unequivocally demonstrate that the augmentation of the protective properties of the rust layer is directly correlated with an increase in Mo content,transitioning from 0.5 to 1.5 wt.%.This transition is most evident in the reduction of the corrosion rate for the 3Ni-Mo steel,dropping from an initial 1.74 mm a^(−1)to a robust 1.31 mm a^(−1)after 768 h of corrosion *** heightened Mo content expedites the formation of a stable and durable rust layer,significantly enriching the proportion ofα-FeOOH within this protective *** stabilized rust layer of 3Ni-Mo weathering steel exhibits a distinct three-layer structure,comprising an outer layer primarily ofγ-FeOOH,an intermediate layer mainly composed of Fe_(2)O_(3)/Fe_(3)O_(4),and an inner layer predominantly composed ofα-FeOOH andβ-***,an alkaline interface enriched with NiFe_(2)O_(4)and CuFe_(2)O_(4)develops between the inner layer and the ***,Mo promotes the deposition of MoO_(2),MoO_(3),and molybdate on both the inner layer and alkaline steel-rust interface to repair corrosion pits and fill ***,Mo facilitates the generation of compounds such as NiFe_(2)O_(4)and CuFe_(2)O_(4),which heightens the electronegativity of the intermediate rust layer and the steel-rust interface,preventing Cl^(−)-induced interface acidification and pitting *** higher Mo con

关键词： 3Ni-Mo weathering steel Corrosion behavior Corrosion-resistant mechanisms Stable rust layer

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Influence of the Identification Procedures of the Material Model in Accurate Prediction of Incremental Sheet Forming Forces 14th

Influence of the Identification Procedures of the Material M...

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14th International Conference on Technology of Plasticity, ICTP 2023

作者： Betaieb, Ehssen Shin, Jaekwang Lee, Youngrok Duchêne, Laurent Taub, Alan I. Banu, Mihaela Habraken, Anne Marie Urban and Environmental Engineering University of Liège Liège Belgium Department of Mechanical Engineering University of Michigan Ann Arbor United States Department of Materials Science and Engineering University of Michigan Ann Arbor United States

ISBN: (纸本)9783031409196

Finite element simulations of sheet metal forming processes achieve high precision of the process model. Previous works [1] on the impact of the selection of the material law on the prediction accuracy of the formed results have shown that more sophisticated yield functions allow better prediction compared to von Mises or Hill 48 models. However, this choice increases the cost of calibration, as it requires extensive material testing, and in some cases, crystal plasticity modeling predictions. In this work, the selection of the material model is investigated with respect to the accuracy of the force prediction in single point incremental sheet forming (SPIF) simulations. It is shown that the calibration of the material model using shear tests instead of tensile tests can satisfy the required accuracy of SPIF force prediction. This study investigates the accuracy and computation cost of using only von Mises yield surface and an isotropic hardening model versus Hill 48 and Barlat Yld2004-18p yield criteria. AA7075-O cone parts are used to compare the force prediction results. © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Finite element method

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Bubble-pen lithography:Fundamentals and applications

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Aggregate 2022年第4期3卷 85-100页

作者： Pavana Siddhartha Kollipara Ritvik Mahendra Jingang Li Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexasUSA Department of Electrical and Computer Engineering The University of Texas at AustinAustinTexasUSA Material Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexasUSA

Developing on-chip functional devices requires reliable fabrication methods with high resolution for miniaturization,desired components for enhanced performance,and high throughput for fast prototyping and mass ***,laser-based bubble-pen lithography(BPL)has been developed to enable sub-micron linewidths,in situ synthesis of custom materials,and on-demand patterning for various functional components and *** exploits Marangoni convection induced by a laser-controlled microbubble to attract,accumulate,and immobilize particles,ions,and molecules onto different *** years have witnessed tremendous progress in theory,engineering,and application of BPL,which motivated us to write this ***,an overview of experimental demonstrations and theoretical understandings of BPL is ***,we discuss the advantages of BPL and its diverse applications in quantum dot displays,biological and chemical sensing,clinical diagnosis,nanoalloy synthesis,and *** conclude this review with our perspective on the challenges and future directions of BPL.

关键词： additive manufacturing capillary flow lithography marangoni convection microbubbles sensing

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Fracture toughness of a rejuvenated β-Ti reinforced bulk metallic glass matrix composite

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Journal of materials science & Technology 2022年第11期106卷 225-235页

作者： Devashish Rajpoot R.Lakshmi Narayan Long Zhang Punit Kumar Haifeng Zhang Parag Tandaiya Upadrasta Ramamurty Department of Mechanical Engineering Indian Institute of Technology BombayPowaiMumbai400076India Department of Mechanical and Aerospace Engineering in Nanyang Technological University Singapore 637331Republic of Singapore Department of Materials Science and Engineering Indian Institute of Technology DelhiHauz KhasNew Delhi110016India Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A∗STAR)Singapore 138634Republic of Singapore

A β-Ti dendrite reinforced Zr-based bulk metallic glass composite(BMGC) was found to be brittle when cast in a large size. The reasons for the embrittlement and the effectiveness of the cryothermal cycling(CTC) treatment in restoring the mode I fracture toughness are examined. Plasticity in all the CTC treated BMGC is estimated from the distribution and occurrence of pop-ins in nanoindentation tests and by measuring the magnitude of enthalpy of relaxation(△H_(rel)) via differential scanning calorimetry(DSC). This is further validated by examining the strain-to-failure(ε_(f)) in compression tests. Mode I fracture behaviour of the as-cast embrittled BMGC and the CTC treated BMGC, which exhibits maximum plasticity, is examined. Results show that both BMGCs are equally brittle and exhibit 5 times lower notch toughness(K_(QJ))than their tougher counterpart. Post-facto imaging of the side surfaces reveals the absence of notch-tip plasticity in both BMGCs. The lack of notch tip plasticity of CTC treated BMGC, despite exhibiting signatures of plasticity in nanoindentation and higher △Hrelis rationalized by reassessing the origin of pop-ins in nanoindentation tests and describing the variations in chemical and topological short range ordering during CTC, respectively. Implications of these results in terms of improving the fracture toughness of structurally relaxed BMGCs via CTC are discussed.

关键词： Bulk metallic glass composites Fracture Rejuvenation Shear bands Microsegragation

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