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Corrosion inhibition of layered double hydroxides for metal-based systems

Nano materials science 2021年第1期3卷 47-67页

作者： Chuan Jing Biqin Dong Aikifa Raza Tiejun Zhang Yuxin Zhang State Key Laboratory of Mechanical Transmissions College of Materials Science and EngineeringChongqing UniversityChongqing400044PR China Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering Shenzhen UniversityShenzhen518060PR China Department of Mechanical Engineering Masdar InstituteKhalifa University of Science and TechnologyP.O.Box 127788Abu DhabiUnited Arab Emirates

Layered double hydroxide(LDH),a kind of 2D layered materials,has been recognized as the promising anticorrosion materials for metal and its *** microstructure,physical/chemical properties,usage in corrosion inhibition and inhibition performance of LDH have been studied separately in open ***,there is a lack of a complete review to summarize the status of LDH technology and the potential R&D opportunities in the field of corrosion *** addition,the challenges for LDH in corrosion inhibition of metal-based system have not been summarized ***,we review recent advances in the rational design of LDH for corrosion inhibition of metal-based system(*** alloy,Al alloy,steel and concrete)and high-throughput anticorrosion materials *** evaluating the physical/chemical properties,usage in metal-based system and the corrosion inhibition mechanism of LDH,we highlight several important factors of LDH for anticorrosion performance and common features of LDH in applying different metal ***,we provide our perspective and recommendation in this field,including high-throughput techiniques for combinatorial compositional design and rapid synthesis of anticorrosion alloys,with the goal of accelerating the development and application of LDH in corrosion inhibition of metal-based system.

关键词： Layered double hydroxide Corrosion inhibition Magnesium alloy Aluminum alloy Steel Concrete

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Peculiarities of Phase Composition, Microstructure, and High-Temperature (600–700 °C) Fracture Toughness of Ti–Al–Cu Composite 11th

Peculiarities of Phase Composition, Microstructure, and High...

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11th International Conference on Nanotechnology and Nanomaterials, NANO 2023

作者： Kulyk, V.V. Vasyliv, B.D. Lyutyy, P.Y. Duriagina, Z.A. Vira, V.V. Trostianchyn, A.M. Kovbasiuk, T.M. Vynar, V.A. Vavrukh, V.I. Department of Materials Science and Engineering Lviv Polytechnic National University 12 S. Bandera Str Lviv79013 Ukraine Department of Hydrogen Technologies and Alternative Energy Materials Karpenko Physico-Mechanical Institute of the NAS of Ukraine 5 Naukova Street Lviv79060 Ukraine Department of Materials Engineering The John Paul II Catholic University 14 Raclawickie Al Lublin20950 Poland Department of Strength of Materials and Structural Mechanics Lviv Polytechnic National University 12 S. Bandera Street Lviv79013 Ukraine Department of Corrosion and Corrosion Protection Karpenko Physico-Mechanical Institute of the NAS of Ukraine 5 Naukova Street Lviv79060 Ukraine

ISBN: (纸本)9783031675188

Among advanced Ti-based composites, Ti–Cu–X alloys have an advantage in high-temperature electrical conductivity. Due to comparatively high electrical conductivity at elevated temperatures, their application area can include spring electrical contacts of power equipment and other products operating in similar conditions. Besides, copper in these alloys contributes to strong antibacterial properties while maintaining good mechanical properties and corrosion resistance. These properties allow the use of Ti–Cu–X alloys in medicine. This work is aimed at studying the phase composition, microstructure, and high-temperature (600–700 °C) fracture toughness of the Ti–Al–Cu composite. Ingots of the composite were prepared by melting in a vacuum induction furnace. The following phase fractions were determined using X-ray diffraction analysis of the composite: Ti2Cu (58.3 wt%), TiCu (37.5 wt%), Ti3Cu (4.2 wt%). Bar specimens were prepared by electric-discharge cutting of ingots, and then the specimens were ground and polished. The specimens with a sharp edge notch underwent the fracture toughness test in a wide temperature range (20 °C to 700 °C). Based on the test results, it was concluded that the Ti–Al–Cu composite can be successfully used for manufacturing electrical contacts of power equipment. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Corrosion resistance

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A state-of-the-art review on SiC and MWCNTs reinforced hybrid metal matrix composites: Processing, properties, and applications

Hybrid Advances

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Hybrid Advances 2025年 10卷

作者： Divakar, Sanoj Sardar, Santanu Sah, Satesh Das, Debdulal Department of Metallurgy and Materials Engineering Indian Institute of Engineering Science and Technology Shibpur West Bengal Howrah 711103 India Department of Mechanical Engineering Indian Institute of Engineering Science and Technology Shibpur West Bengal Howrah 711103 India

In recent years, the focus of material scientists has been moving from single to hybrid metal matrix composites (HMMCs) in order to fulfil the ever-increasing industrial demand for low-cost and lightweight materials with comprehensive mechanical performances. Discontinuous HMMCs, often with multi-scaled reinforcements with contrasting properties, are relatively simple to manufacture. They offer exciting property combinations like great specific-strength, acceptable formability and toughness, and outstanding wear resistance, making them potential candidates for a wide range of applications in the aerospace, automotive, and military sectors. Metal matrix reinforced with one hard ceramic and another carbonaceous material are the most researched hybrid composites;among these, silicon carbide (SiC) and multi-walled carbon nanotubes (MWCNTs) reinforced ones are the most promising. Therefore, the current article presented a comprehensive review of the processing, microstructures, properties, and applications of SiC plus MWCNTs reinforced light metal matrix hybrid composites, emphasizing the recent advancements, current challenges, and future directions. Various fabrication methods were compared in terms of microstructural characteristics and mechanical properties, while the role of different processing parameters was identified. The emerging steps to overcome the challenges of dispersion of reinforcements, damage of MWCNTs, and interfacial reaction during processing were explicitly addressed. New understandings of the thermal, electrical, tensile, tribological, and corrosion properties of the selected composite system were systematically highlighted. © 2025 The Authors

关键词： Carbonaceous Hybrid metal matrix composites mechanical and tribological properties Microstructural properties MWCNTs Processing SiC

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Direct Self-Identification of Inverse Jacobians for Dexterous Manipulation Through Particle Filtering

Direct Self-Identification of Inverse Jacobians for Dexterou...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： Joshua T. Grace Podshara Chanrungmaneekul Kaiyu Hang Aaron M. Dollar Department of Mechanical Engineering & Materials Science Yale University New Haven CT USA Department of Computer Science Rice University Houston TX USA

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

The ability to plan and control robotic in-hand manipulation is challenged by several issues, including the required amount of prior knowledge of the system and the sophisticated physics that varies across different robot hands or even grasp instances. One of the most direct models of in-hand manipulation is the inverse Jacobian, which can directly map from the desired in-hand object motions to the required hand actuator controls. However, acquiring such inverse Jacobians without complex hand-object system models is typically infeasible. We present a method for controlling in-hand manipulation using inverse Jacobians that are self-identified by a particle filter-based estimation scheme that leverages the ability of underactuated hands to maintain a passively stable grasp during self-identification movements. This method requires no a priori knowledge of the specific hand-object system and learns the system’s inverse Jacobian through small exploratory motions. Our system approximates the underlying inverse Jacobian closely, which can be used to perform manipulation tasks across a range of objects successfully. With extensive experiments on a Yale Model O hand, we show that the proposed system can provide accurate in-hand manipulation of sub-millimeter precision and that the inverse Jacobian-based controller can support real-time manipulation control of up to 900Hz.

关键词： Jacobian matrices Shape Robot vision systems Estimation Transforms Cameras Particle filters

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The Effects of Different Post-Heat Treatments on Rolling Contact Fatigue Behaviors of Direct Laser Cladding Inconel 625 Coatings

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Journal of Renewable materials 2021年第1期9卷 129-144页

作者： Qiaoxin Zhang Rui Chen Ding Jin Chen Zhou Xuewu Li School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan430070China School of Mechanical Engineering Xi’an University of Science and TechnologyXi’an710054China State Key Laboratory of Tribology Tsinghua UniversityBeijing100084China Shandong Key Laboratory of Corrosion Science Institute of OceanologyChinese Academy of SciencesQingdao266071China

In this paper,the microstructures and rolling contact fatigue behaviors of laser cladding Inconel 625 coatings with or without post-heat treatments were *** results revealed that the fatigue resistance of the laser cladding coating after any post-heat treatment was worse than that of the as-deposited ***,through the finite element analysis,the distribution of stress along the thickness direction of the coating was obtained,and it was concluded that the bonding interface between the coating and the matrix had little effect on the fatigue properties of the *** X-ray diffraction(XRD),scanning electron microscopy(SEM)and energy dispersive spectrometry(EDS)were used to analyze the microstructure and failure *** results revealed that the subsurface failure morphology of the coatings showed a consistent correlation with rolling fatigue property after different heat *** TCP phase and carbides have been shown in the laser cladding *** coating after stress relieved annealing exhibited chain-shaped granular carbides on the grain boundaries which could accelerate crack *** aging heat treatment made small amounts of Laves phase dissolved in the coating,while the dispersed phase was precipitated which could result in the formation of *** the solution treatment made large amounts of Laves phase dissolved,while the rod-shape brittle phases were generated which was easy to fracture and contribute to crack initiation and spalling.

关键词： Laser cladding Inconel 625 coating heat treatment rolling contact fatigue microstructure

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Merging Variable Stiffness Fiber Patterns on Multi-Shape Robotic Sheets

Merging Variable Stiffness Fiber Patterns on Multi-Shape Rob...

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IEEE International Conference on Soft Robotics (RoboSoft)

作者： Medha Goyal Maggy Lambo Josh Bongard Rebecca Kramer-Bottiglio Department of Mechanical Engineering & Materials Science Yale University New Haven CT USA Department of Computer Science University of Vermont Burlington VT USA

Shape morphing can be achieved using thin, pla-nar sheets patterned with strain-limiting constraints to direct differential growth into desired shapes. Our previous work produced such shape-shifting sheets using an inflatable sheet with variable stiffness fibers placed in patterns optimized by a multi-objective evolutionary algorithm. With our pipeline, we generated two specialized fiber patterns $\{P_{i},\ P_{j}\}$ to produce shapes $\{S_{i},\ S_{j}\}$ , which we then layered onto the same sheet. However, this layering approach had translation inefficiencies in hardware, such as fiber redundancies. To reduce fiber crowding and increase shape fidelity, we propose that fibers identified as similar in both $P_{i}$ and $P_{j}$ can be implemented as a single fiber belonging to both patterns. Extending our previous work, herein we implement a post-optimization fiber merging protocol. Applying the protocol to sheets patterned with fibers targeting two shape-pairs, cylinder/sphere and simple saddle/monkey saddle, we demonstrate that fiber merging reduces the total number of fibers on each sheet, thus reducing sheet bulk and weight. We further measure the error between the target shapes and actual hardware shapes: For the cylinder/sphere shape-pair, the error increases with merging implemented when compared to the original, unmerged fiber patterns. For the monkey saddle/simple saddle shape-pair, the error decreases for one or both shapes for all fiber mergers implemented. The results indicate that fiber merging is increasingly useful with increasing fiber pattern complexity as measured by fiber count. Therefore, fiber merging is a potentially useful strategy to simplify the complexity of fiber designs required for shape-matching.

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Glycerol Electrooxidation over Precision-Synthesized Gold Nanocrystals with Different Surface Facets

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Precision Chemistry 2024年第3期2卷 103-111页

作者： Hansen Mou Fang Lu Zechao Zhuang Qiaowan Chang Lihua Zhang Xiaobo Chen Yugang Zhang Jingguang G.Chen Department of Chemical Engineering Columbia UniversityNew YorkNew York 10027United States School of Chemical Engineering and Bioengineering Washington State UniversityPullmanWashington 99164United States Center for Functional Nanomaterials Brookhaven National LaboratoryUptonNew York 11973United States Materials Science and Engineering Program State University of New York at BinghamtonBinghamtonNew York 13902United States Chemistry Division Brookhaven National LaboratoryUptonNew York 11973United States

Electrochemical glycerol oxidation(EGO)emerges as a promising route to valorize glycerol,an underutilized byproduct from biodiesel production,into value-added *** study employed three types of gold(Au)nanocrystals with controlled shapes to elucidate the facet-dependent electrocatalytic behavior in ***,rhombic dodecahedral,and cubic Au nanocrystals with{111},{110},and{100}facets,respectively,were precisely synthesized with uniform size and *** dodecahedra exhibited the lowest onset potential for EGO due to facile AuOH formation,while octahedra showed enhanced electrochemical activity for glycerol oxidation and resistance to ***-situ FTIR analysis revealed that Au{111}surfaces selectively favored C_(2) products,whereas Au{100}surfaces promoted C_(3) product formation,highlighting the significant effect of facet orientation on EGO performance and informing catalyst design.

关键词： Electrochemical glycerol oxidation Precision synthesis Shaped nanocrystals Au nanocrystals SAXS In-situ FTIR

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Ultrahigh Thermal Conductivity of Cubic Boron Arsenide with an Unexpectedly Strong Temperature Dependence

arXiv

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arXiv 2024年

作者： Hou, Songrui Pan, Fengjiao Shi, Xinping Nataj, Zahra Ebrahim Kargar, Fariborz Balandin, Alexander A. Cahill, David G. Li, Chen Ren, Zhifeng Wilson, Richard B. Materials Science and Engineering University of California RiversideCA92521 United States University of Houston HoustonTX77204 United States Department of Mechanical Engineering University of California RiversideCA92521 United States Department of Materials Science and Engineering University of California Los AngelesCA90095 United States Department of Materials Science and Engineering Materials Research Laboratory University of Illinois at Urbana-Champaign UrbanaIL61801 United States

materials with high thermal conductivity are needed to conduct heat away from hot spots in power electronics and optoelectronic devices. Cubic boron arsenide (c-BAs) has a high thermal conductivity due to its special phonon dispersion relation. Previous experimental studies of c-BAs report a room-temperature thermal conductivity between 1000 and 1300 watts per meter-kelvin. We synthesized high purity c-BAs single crystals with room-temperature thermal conductivity of 1500 watts per meter-kelvin. We observed its thermal conductivity to be proportional to the inverse square of temperature between 300 and 600 kelvin, a stronger dependence than predicted by state-of-the-art theory. © 2024, CC BY.

关键词： Temperature distribution

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Optical Patterning of Two-Dimensional materials

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Research 2020年第1期2020卷 1064-1078页

作者： Pavana Siddhartha Kollipara Jingang Li Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA Materials Science&Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX 78712USA

Recent advances in the field of two-dimensional(2D)materials have led to new electronic and photonic devices enabled by their unique properties at atomic *** 2D materials into desired patterns on substrates is often an essential and foremost step for the optimum performance of the functional *** this regard,optical patterning of 2D materials has received enormous interest due to its advantages of high-throughput,site-specific,and on-demand *** years have witnessed scientific reports of a variety of optical techniques applicable to patterning 2D *** this minireview,we present the state-of-the-art optical patterning of 2D materials,including laser thinning,doping,phase transition,oxidation,and *** applications based on optically patterned 2D materials will be discussed as *** further developments,optical patterning is expected to hold the key in pushing the frontiers of manufacturing and applications of 2D materials.

关键词： frontier doping optimum

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Discovery of Ni Activated Sintering of MoNbTaW Predicted by a Computed Grain Boundary Diagram

SSRN

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SSRN 2023年

作者： Shivakumar, Sashank Song, Keqi Wang, Chunyang Lei, Tianjiao Xin, Huolin L. Rupert, Timothy J. Luo, Jian Department of Nano and Chemical Engineering Program of Materials Science and Engineering University of California San Diego La Jolla CA92093 United States Department of Physics and Astronomy University of California IrvineCA92697 United States Department of Materials Science and Engineering Department of Mechanical and Aerospace Engineering University of California IrvineCA92697 United States

Activated sintering of refractory metals represents a classical phenomenon in powder metallurgy. This study discovers that Ni addition can enhance sintering of MoNbTaW both above and below the bulk solidus composition at 1800 °C, thereby demonstrating the first example of activated sintering of a high-entropy alloy. To probe the underlying mechanism, experiments reveal complete grain boundary (GB) wetting above the bulk solidus composition, which logically infers the stabilization of a liquid-like interfacial phase (GB complexion) in a prewetting region below the bulk solidus composition. Furthermore, bulk CALPHAD (calculation of phase diagram) methods have been extended to model GBs in Ni-doped MoNbTaW to compute a GB "phase" diagram to forecast high-temperature GB disordering in the prewetting region and rationalize the observed Ni activated sintering of MoNbTaW. Only weak GB segregation of Ni is found in furnace-cooled specimens, which suggests GB "drying" during cooling, consistent with the observed nanoscale precipitates along GBs. © 2023, The Authors. All rights reserved.

关键词： Grain boundaries

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