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4th International Conference on mechanical, Electronics, and Electrical and Automation Control, METMS 2024

作者： Cheng, Ge Li, Zilin Pei, Xinjun Lin, Liangpeng Department of Mechanical and Electrical Engineering Yangjiang Polytechnic Yangjiang China School of Materials Science and Engineering Guangdong Ocean University Yangjiang China Yang-jiang Yue-de Cooperative Vocational Education and Training Center Yangjiang China

ISBN: (数字)9781510679887

ISBN: (纸本)9781510679870

This research focus on optimizing cutting parameters to realize high quality and efficiency in milling gray cast iron HT250. The experiments were designed by box-behnken design of response surface methodology and simulated in DEFORM-3D software, Second-order regression models of cutting temperature and surface roughness were obtained, which can predict the cutting temperature and surface roughness. Finally, the cutting parameters were optimized using a multi-objective genetic algorithm. The optimized results showed that the material removal rate increased by 49.28 %, while the cutting temperature decreased by 2.84% and the surface roughness decreased by 18.72 %. Additionally, the cutting temperature decreased by 20.02 % and the surface roughness 42.19 %, while the material removal rate increased by 7.78 %. According to the comprehensive study, the selection principle of cutting parameters for milling gray cast iron HT250 is as follows: use a low cutting speed, a large feed rate, a small depth of cut and a large width of cut. © 2024 SPIE.

关键词： Surface roughness

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Thermal Hall effect in insulating quantum materials

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The Innovation 2022年第5期3卷 3-4页

作者： Shucheng Guo Youming Xu Ran Cheng Jianshi Zhou Xi Chen Department of Electrical and Computer Engineering University of CaliforniaRiversideRiversideCA 92521USA Department of Physics and Astronomy University of CaliforniaRiversideRiversideCA 92521USA Materials Science and Engineering Program Department of Mechanical EngineeringUniversity of Texas at AustinAustinTX 78712USA

The emerging field of quantum materials involves an exciting new class of materials in which charge,spin,orbital,and lattice degrees of freedom are intertwined,exhibiting a plethora of exotic physical *** materials include,but are not limited to,superconductors,topological quantum matter,and systems with frustrated spins,which enable a wide range of potential applications in biomedicine,energy transport and conversion,quantum sensing,and quantum information processing。

关键词： properties. quantum topological

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High-entropy alloys in thermoelectric application:A selective review

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Chinese Physics B 2024年第5期33卷 1-11页

作者：任凯霍文燚陈帅程渊王彪张刚 Zhengzhou University Advanced Medical Research Center Luoyang Central HospitalLuoyang 471099China School of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037China Materials Genome Institute Shanghai UniversityShanghai 200444China Monash Suzhou Research Institute Monash UniversitySuzhou 215000China Department of Materials Science and Engineering Monash UniversityClayton VIC 3800Australia Research Institute of Interdisciplinary Science Dongguan University of TechnologyDongguan 523808China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019China

Since the superior mechanical,chemical and physical properties of high-entropy alloys(HEAs)were discovered,they have gradually become new emerging candidates for renewable energy *** review presents the novel applications of HEAs in thermoelectric energy ***,the basic concepts and structural properties of HEAs are ***,we discuss a number of promising thermoelectric materials based on ***,the conclusion and outlook are *** article presents an advanced understanding of the thermoelectric properties of HEAs,which provides new opportunities for promoting their applications in renewable energy.

关键词： high-entropy alloys thermoelectric materials thermal conduction

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Microstructural characterization of HP50 stainless steel tube from ethylene plant radiant furnace after 4 years of operation

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materials Today: Proceedings 2022年 66卷 3107-3111页

作者： Hafidz, Muhammad Lantang, Yorina S.F. Ardy, Husaini Materials Engineering Department Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology Jl. Ganesa 10 Bandung 40132 Indonesia Materials Science and Engineering Research Group Bandung Institute of Technology Jl. Ganesa 10 Bandung 40132 Indonesia

The microstructure of HP50 cast stainless steel tubes for radiant ethylene cracking furnace, which has been in service for four years at about 900 °C, was investigated. Optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy, and Rockwell hardness test were used to analyze the material properties. Extensive growth of the primary carbide network and secondary carbide precipitates caused by carburization were observed near the inner wall of the tubes. In contrast, the area near the outer wall showed minimum carbide growth due to decarburization. The quantitative analysis results showed that the fraction of carbide in the inner, mid, and outer areas were 33, 10, and 4% respectively. Hardness test data confirmed this observation and showed increasing hardness in the inner area and decreasing hardness in the mid and outer areas. Carbide-free zone and precipitation of silicon oxide were observed on both the inner and outer walls. Intergranular corrosion due to sensitization and severe carburization occurred on the inner wall. © 2022

关键词： Stainless steel

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Characterization of Fluoride-added Hydroxyapatite Derived from Eggshells for Dental Application 15

Characterization of Fluoride-added Hydroxyapatite Derived fr...

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15th Biomedical engineering International Conference, BMEiCON 2023

作者： Uthayaphamornwat, Vilasinee Khantachawana, Anak Kitiwan, Mettaya Srirussamee, Kasama Tunthawiroon, Phacharaphon School of Engineering Department of Biomedical Engineering Bangkok10520 Thailand Faculty of Engineering Department of Mechanical Engineering Bangkok10140 Thailand Biological Engineering Program Faculty of Engineering Bangkok10140 Thailand School of Science Department of Physics Bangkok10520 Thailand Devices and Systems for Energy and Environment Research Unit School of Science Bangkok10520 Thailand School of Engineering Department of Industrial Engineering Bangkok10520 Thailand

ISBN: (纸本)9798350345247

Hydroxyapatite (HA) is one of the potential biomaterials used for treating dental defects. It can be incorporated with fluoride to enhance its anti-caries properties, though other properties could be dependent on processing technique. Hence, this study aims to characterize the influence of sintering on the properties of fluoride-added HA derived from eggshells. FTIR and XRD techniques are used to characterize the chemical and crystal structures of the samples, whilst dissolution test is carried out to characterize material degradation in the acidic environment. The results show that sintering increased the crystallinity in both HA and fluoride-add HA (F-HA) samples, which corresponds with the enhanced stability during the dissolution test. Moreover, it is also found that the addition of fluoride could further stabilize the material structure, though the impurities found in all the samples still need to be minimized. These findings suggest that sintering and fluoride addition could potentially enhance anti-caries properties of eggshell-derived HA, which could be beneficial for dental application in future subject to further process optimization and analysis. © 2023 IEEE.

关键词： Hydroxyapatite

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Microwave-accelerated direct regeneration of LiCoO_(2)cathodes for Li-ion batteries

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science China Chemistry 2024年第7期67卷 2181-2189页

作者： Xueshan Hu Yun-Chao Yin Chao Li Lihui Zhou Lin Yang Yitian Feng Daxian Zuo Chenhui Ning Das Soham Sheng Dai Longbin Qiu Lin Zeng Haw Jiunn Woo Jiayu Wan Future Battery Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Centre for Ionics University of Malaya Department of PhysicsFaculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Natural and Applied Sciences Duke Kunshan UniversityKunshan 215316China

Recycling spent lithium-ion batteries is integral to today's low-carbon environmental protection *** concept of direct regeneration,acknowledged for its environmental sustainability,economic viability,and consistent performance of recycled materials,is gaining *** study presents an efficient and nondestructive approach by utilizing an ultrafast microwave technology to directly regenerate spent lithium cobaltate(LCO)cathode *** contrast to conventional furnacebased processes,this method significantly reduces the regeneration *** subjecting the spent LCO mixed with lithium sources to three microwave heating cycles(at approximately 1,350 K),LCO regeneration is achieved,yielding a specific capacity of 140.8 mAh g^(-1)(0.2 C)with a robust cycle *** further environmental and economic benefits,the ultrafast microwave technology holds scientific promise for directly regenerating cathode materials,while establishing competitiveness for industrial applications.

关键词： battery recycling spent lithium cobaltate microwave directly regeneration cathode materials

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mechanical Behavior of Bamboo,and Its Biomimetic Composites and Structural Members:A Systematic Review

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Journal of Bionic engineering 2024年第1期21卷 56-73页

作者： Shanyu Han Yuyuan He Hanzhou Ye Xueyong Ren Fuming Chen Kewei Liu Sheldon Q.Shi Ge Wang Institute of Biomaterials for Bamboo and Rattan Resources International Centre for Bamboo and RattanBeijing 100102China Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo&Rattan Science and Technology Beijing 100102China National Forestry and Grassland Engineering Technology Center for Wood Resources Recycling College of Materials Science and TechnologyBeijing Forestry UniversityBeijing 100083China International Bamboo and Rattan Organization Beijing 100102China School of Civil Engineering Tsinghua UniversityBeijing 100084China Mechanical Engineering Department University of North TexasDentonTX 762077102USA

Bamboo is a typical biological material widely growing in nature with excellent physical and mechanical *** is lightweight with high strength and *** naturally optimized bamboo structure,which has inspired global material scientists and engineers for decades,is significantly important for the bionic design of novel structural materials with ultra-light,ultra-strong,or ultra-tough and comprehensive *** literature on innovative composite materials and structural members inspired by bamboo are reviewed in this paper,and the research progress and prospects in this field are expounded in three ***,the structural characteristics of the bamboo wall layer along the thickness and height directions are described in terms of chemical composition,gradient structure,pore structure,and hollow structure with variable ***,this paper summarizes the research progress on new composite materials and structural components by applying bamboo’s structural features from the perspective of sustainability,designability,and ***,given the limitations of current research,the biomimetic scientific research on bamboo’s structural characteristics is prospected from the interpretation of bamboo structure,new bamboo-like materials,and structural design optimization perspectives,providing a reference for future research on biomimetic aspects of biomass.

关键词： Bamboo Structural characteristics-Bamboo-like material Physical and mechanical properties

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Microcellular foamed polyamide 6/carbon nanotube composites withsuperior electromagnetic wave absorption

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Journal of materials science & Technology 2022年第22期117卷 215-224页

作者： Menglong Xu Linfeng Wei Li Ma Jiawei Lu Tao Liu Ling Zhang Ling Zhao Chul B.Park State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Mechanical and Industrial Engineering University of Toronto5 King’s College RoadTorontoOntario M5S 3G8Canada Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Electromagnetic (EM) wave pollution causing damage to precision equipment and threatening thehealth of living organisms has attracted considerable attention. Herein, promising microcellular foamedpolyamide 6 (PA6)/carbon nanotube (CNT) composites for highly efficient EM wave absorption were successfully fabricated using supercritical CO_(2) foaming. Nanocomposites foams with a void fraction rangingfrom 38.7% to 85.1% were achieved, providing a platform to assess the correlation of the electrical conductivity, the dielectric permittivity and the EM wave absorption properties with porosity. Notably, theFoam-257.5C sample with a void fraction of 38.7% exhibited outstanding EM wave absorption characteristics at a thickness of only 1.59 mm and an ultra-low reflection loss value of -55.3 dB (99.9997% wave absorption). Most importantly, the effective absorption bandwidth (EAB) of the Foam-257.5C sample couldcover the entire Ku band (12.4–18 GHz) by slightly adjusting the thickness from 1.20 to 1.60 mm. Thesuperior EM wave absorption performance of the Foam-257.5C sample was attributed to multiple reflections and scattering at the solid-gas interfaces, favorable impedance matching due to the existence ofa large polymer-air interface area, conductive loss near the interfaces and interfacial polarization. Thus,this study offers an eco-friendly, simple and versatile methodology to develop high-efficiency, flexiblepolymer-based EM wave absorbents.

关键词： Polymer nanocomposites Supercritical CO_(2)foaming Void fraction Dielectric properties Electromagnetic wave absorption

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Effect of multiaxial deformation on structure, mechanical properties, and corrosion resistance of a Mg-Ca alloy

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Journal of Magnesium and Alloys 2022年第1期10卷 284-298页

作者： N.Yu.Yurchenko N.D.Stepanov G.A.Salishchev V.N.Serebryany N.S.Martynenko E.A.Lukyanova L.L.Rokhlin N.Birbilis S.V.Dobatkin Y.Z.Estrin Belgorod State National Research University BelgorodRussia Federal State Budget Institution of Science A.A.Baikov Institute of Metallurgy and Materials Science.Russian Academy of SciencesMoscowRussia National University of Science and Technology"MISiS" MoscoicRussia Department of Materials Engineering Monash UniversityClaytonVIC 3800Australia Department of Mechanical Engineering The University of Western AustraliaMedian ds WA 6009、Australia

This article provides a report on the effect of multiaxial deformation(MAD) on the structure, texture, mechanical characteristics, and corrosion resistance of the Mg-0.8(wt.)% Ca alloy. MAD was carried out on the alloy in the as-cast and the annealed states in multiple passes, with a stepwise decrease in the deformation temperature from 450 to 250 ℃ in 50 ℃ steps. The cumulative true strain at the end of the process was 22.5. In the case of the as-cast alloy, this resulted in a refined microstructure characterized by an average grain size of 2.7 μm and a fraction of high-angle boundaries(HABs) of 57.6%. The corresponding values for the annealed alloy were 2.1 μm and 68.2%. The predominant mechanism of structure formation was associated with discontinuous and continuous dynamic recrystallization acting in concert. MAD was also shown to lead to the formation of a rather sharp prismatic texture in the as-cast alloy, whilst in the case of the annealed one the texture was weakened. A displacement of the basal poles {00.4} from the periphery to the center of a pole figure was observed. These changes in the microstructure and texture gave rise to a significant improvement of the mechanical characteristics of the alloy. This included an increase of the ultimate tensile strength reaching 308 MPa for annealed material and 264 MPa for the as-cast one in conjunction with a twofold increase in ductility. A further important result of the MAD processing was a reduction of the rate of electrochemical corrosion, as indicated by a significant decrease in the corrosion current density in both microstructural states of the alloy studied.

关键词： Metals and alloys Multiaxial deformation Microstructure Recrystallization mechanical properties Corrosion

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Aqueous Flow Batteries for Energy Storage

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Energy Material Advances 2024年第1期5卷 133-134页

作者： Wei Wang Yi-Chun Lu Qing Wang Xianfeng Li Energy and Environment Directorate Pacific Northwest National LaboratoryRichlandWA 99354USA Electrochemical Energy and Interfaces Laboratory Department of Mechanical and Automation EngineeringThe Chinese University of Hong KongHong KongChina Department of Materials Science and Engineering College of Design and EngineeringNational University of SingaporeSingapore 117574Singapore Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

The wide deployment of renewable sources such as wind and solar power is the key to achieve a low-carbon world[1].However,renewable energies are intermittent,unstable,and uncontrollable,and large-scale integration will seriously affect the safe,efficient,and reliable operation of the power *** storage is the key to smooth output and further realize the application of renewable energies[2].Among different types of energy storage techniques,aqueous flow batteries(FBs)are one of the preferred technologies for large-scale and efficient energy storage due to their advantages of high safety,long cycle life(15 to 20 years),and high efficiency[3-5].

关键词： flow batteries fbs aqueous flow batteries wind power renewable sources energy storage renewable energies wind solar power

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