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4th International Symposium on Advances and Innovation in mechanical engineering, ISAIME 2023

作者： Prahmana, Rico Aditia Darmanto, Prihadi Setyo Reksowardojo, Iman Kartolaksono Prakoso, Tirto Juangsa, Firman Bagja Doctoral Program of Mechanical Engineering Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Institut Teknologi Sumatera South Lampung35365 Indonesia Thermal Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung Indonesia Department of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Universitas Pertamina Jakarta12220 Indonesia

In the last decade, the Indonesian government has implemented a program to use biodiesel as a substitute for fossil diesel to reduce dependence on fossil fuels. On the other hand, the development of biodiesel as an alternative fuel to replace fossil diesel has several challenges, one of which is the production of biodiesel, which is more complicated and requires a long process. However, the direct use of crude palm oil (CPO) in diesel engines is not recommended because it has many drawbacks. Research recently shows that fuel additives in diesel engines have promising prospects. Therefore, to solve the problem, this study used pure palm oil (PPaO) as the primary fuel, with the addition of silicon oxide (SiO2) as a fuel additive in diesel engines. The results showed that using SiO2 additive in PPaO can increase thermal efficiency by 18.8% at 60% load compared to diesel fuel (DF). Nevertheless, using this fuel increased specific fuel consumption (SFC) by 3.9% on average and increased the opacity by 153% compared to diesel fuel. These results indicate that SiO2 has the potential to be developed as an effective additive to PPaO fuel that can improve the efficiency and performance of diesel engines. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Biodiesel

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A novel carbon-induced-porosity mechanism for improved cycling stability of magnesium hydride

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Journal of Magnesium and Alloys 2025年第3期13卷 1341-1352页

作者： Shuaijun Ding Yuqing Qiao Xuecheng Cai Hongchao Wang Xun Shen Lidong Xu Yixuan Wen Fenglong Jiang Wei Zhou Tongde Shen Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Applied Chemistry College of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong KongChina

MgH_(2) has been extensively studied as one of the most ideal solid hydrogen storage ***,rapid capacity decay and sluggish hydrogen storage kinetics hamper its practical ***,a Ni/C nano-catalyst doped MgH_(2)(MgH_(2)–Ni/C)shows an improved hydrogen absorption kinetics with largely reduced activation ***,the MgH_(2)–Ni/C displays remarkable cycling stability,which maintains a high capacity of 6.01 wt.%(98.8%of initial capacity)even after 50 full hydrogen ab/desorption cycles,while the undoped MgH_(2) counterpart retains only 85.2%of its initial *** microstructure characterizations clearly reveal that particle sintering/growth accounts primarily for the deterioration of cycling performance of undoped MgH_(2).By comparison,MgH_(2)–Ni/C can maintain a stable particle size with a growing porous structure during long-term cycling,which effectively increases the speciﬁc surface of the particles.A novel carbon-induced-porosity stabilization mechanism is proposed,which can stabilize the proportion of rapid hydrogen absorption process,thus dominating the excellent cycling performance of MgH_(2)–Ni/*** study provides new insights into the cycling stability mechanism of carbon-containing Mg-based hydrogen storage materials,thus promoting their practical applications.

关键词： Hydrogen storage materials Magnesium hydride Cycling properties Particle stability Carbon-induced-porosity

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Effect of Sn addition on electrochemical activity of ribbons of Mg-Al-Ca anode material for rechargeable magnesium batteries fabricated by rapid solidification

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第1期75卷 9-13页

作者： Fukuta, Yoshitaka Kikura, Kensei Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Graduate School of Science and Engineering University of Toyama Toyama-shi Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawagun Toyama Japan Saitama Industrial technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

Magnesium-based batteries are potential candidates for next-generation rechargeable batteries due to the divalent nature of magnesium cations and the natural abundance of magnesium resources. In this study, the electrochemical activity of Mg-6mass%Al-3mass%Ca anodes combined with Sn was investigated. Thin ribbons of the anode specimens were prepared by a single-roll rapid solidification method. The results showed that the electrochemical activity increased upon adding 1 mass% Sn, while it decreased for 3 mass% Sn. Based on the results of an X-ray diffraction analysis, the addition of Sn led to the formation of Mg2Sn and Ca2Sn phases, which increased the lattice distortion. Scanning electron microscopy observations indicated that these secondary phases were homogeneously distributed for 1 mass% Sn addition, while they were coarsely distributed for 3 mass% Sn. © 2025 The Japan Institute of Light Metals.

关键词： X ray diffraction analysis

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Great influence of demagnetization history on internal interaction and magnetization process of mischmetal-based magnets

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science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 183-192页

作者： Dan Liu Jiefu Xiong Lichen Wang Xinqi Zheng Xin Ming Jiaying Jin Jiazheng Hao He Bai Zhenxing Li Tongyun Zhao Fengxia Hu Jirong Sun Jun Shen Baogen Shen Department of Physics Beijing Technology and Business UniversityBeijing 10048China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 31521China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Spallation Neutron Source Science Center Dongguan 523803China School of Mechanical Engineering Beijing Institute of Technology Beijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

The magnetization process and corresponding magnetization curve are usually used to analyze the coercivity mechanism of NdFe-B based sintered ***,different demagnetization histories will seriously influence the magnetization curve,leading to an inaccurate understanding and analysis of magnetization *** this work,we investigated the magnetization behavior of multi-main phase(MMP)magnets with thermal demagnetized and alternating current demagnetized *** curves of initial magnetization process and demagnetization process of thermal demagnetized magnets reflect the movement of domain walls inside the grains and the magnetization interaction between the grains,*** is noted that the former process cannot represent the magnetization reversal of the entire magnet,which is not appropriate to analyze coercivity mechanism *** the recoil curves of both two processes of AC demagnetized magnets can illustrate the magnetization reversal of the entire grains and the interaction between ***-optical Kerr microscope shows that the grains of thermal demagnetized magnets are in multi-domain states,and the grains of AC demagnetized magnets are almost in singledomain *** walls of thermal demagnetized magnets move easily within the grains,which is more conducive to magnetization saturation in industrial *** addition,the minorloops of thermal demagnetized magnets can independently represent the transition of grains from multi-domain to single-domain and the demagnetization of single-domain grains,which is equivalent to characterizing the internal interactions by recoil *** investigation of magnetization characteristics of MMP sintered magnets starting from different demagnetized states is helpful to further understand the internal interaction and magnetic hardening mechanism.

关键词： permanent magnet demagnetization history magnetization reversal misch-metal rare earth

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Electron-beam-induced tunable reduction of graphene oxide on cellulose-based filter paper for flexible electromagnetic interference shielding

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Current Applied Physics 2025年 75卷 50-62页

作者： Singh, Jagdeep Tiwari, Santosh K. Bhowmik, Soumik Hada, Karan Singh Dhaliwal, A.S. Department of Physics and Materials Science Thapar Institute of Engineering and Technology Punjab Patiala147004 India Centre for New Materials and Surface Engineering Department of Chemistry NMAM Institute of Technology Nitte Karnataka 574110 India School of Mechanical and Material Science Indian Institute of Technology Mandi Kamand Himachal Pradesh 175005 India Department of Physics Sant Longowal Institute of Engineering and Technology Punjab Longowal148106 India

This study reports the electrochemical exfoliation synthesis of graphene oxide (GO) and the fabrication of free-standing GO films via vacuum filtration on cellulose filter paper (CFP). The films were subjected to electron beam irradiation at 10 keV for varying durations to achieve controlled reduction to reduced graphene oxide (rGO). Comprehensive characterization revealed significant changes in optical, thermal, chemical, morphological, mechanical, and dielectric properties, confirming successful reduction. The resulting rGO/CFP composite was used as electromagnetic interference (EMI) shielding in the 4–14 GHz range. Notably, the film was irradiated for 90 min, exhibiting a shielding effectiveness of 60.8 dB at 10 GHz with a thickness of 0.32 mm. This enhancement is attributed to improved conductivity, polarization relaxation, and dielectric losses caused by hopping carriers and lattice defects. E-beam irradiation presents a chemical-free, efficient method for producing flexible, high-performance rGO/CFP films for EMI shielding. © 2025 Korean Physical Society

关键词： Dielectric losses

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High-performance high-entropy perovskite cathodes with A-site deficiency and Ni doping derived from LaxSr1-xCoyFe1-yO3-δ for solid oxide fuel cells

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Ceramics International 2025年第12期51卷 15837-15845页

作者： Yang, Chen Zheng, Tong Li, Zhiyuan Yu, Fangyong Sun, Haibin Gapsari, Femiana Sunarso, Jaka School of Materials Science and Engineering Shandong University of Technology Shandong Zibo255000 China School of Chemistry and Chemical Engineering Shandong University of Technology Shandong Zibo255000 China Department of Mechanical Engineering Faculty of Engineering Brawijaya University MT Haryono 167 Malang65145 Indonesia Research Centre for Sustainable Technologies Faculty of Engineering Computing and Science Swinburne University of Technology Jalan Simpang Tiga Sarawak Kuching93350 Malaysia

In an effort to obtain simultaneous enhancement in the electrochemical performance and the electronic conductivity while achieving resistance to chromium (Cr) poisoning, here we developed high-entropy perovskite oxide with the composition of (La0.2Nd0.2Sm0.2Sr0.2Ba0.2)0.95(Co0.2Fe0.8)1-xNixO3-δ (HE-LSCF095Nix, x = 0.05, 0.10, 0.15), which contains A-site deficiency and different amount of Ni doping. The composition that contains 0.10 Ni doping, i.e., HE-LSCF095Ni10 showed the highest electrochemical performance, i.e., the lowest polarization resistances (Rp) of 0.83 Ω cm2 at 650 °C and 0.39 Ω cm2 at 700 °C, which are much lower than those of its original high entropy parent perovskite analog La0.2Nd0.2Sm0.2Sr0.2Ba0.2Co0.2Fe0.8O3-δ (HE-LSCF) of 2.14 Ω cm2 at 650 °C and 0.60 Ω cm2 at 700 °C. Density functional theory (DFT) calculations and electrical conductivity measurements revealed that the higher electrochemical performance for HE-LSCF095Ni10 relative to HE-LSCF is due to the lower oxygen vacancy formation energy (−52.75 eV −1 > 168.15 S cm−1 at 700 °C). Notably, following Cr treatment for 40 h, HE-LSCF095Ni10-based symmetrical cell displayed marginal increase in Rp, indicating good resistance to Cr poisoning. Anode-supported single cell based on HE-LSCF095Ni10, i.e., NiO-SDC|SDC|HE-LSCF095Ni10 showed relatively high peak power densities of 0.639, 0.806, and 0.939 W cm−2 at 650, 700, and 750 °C, respectively, which are comparable to the other cells based on best performing cathodes. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Perovskite

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Finite element modeling of machining with interactive friction model based evolutionary friction

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Journal of Manufacturing Processes 2025年 148卷 61-74页

作者： Mia, Mozammel Anwar, Saqib Yang, Xiao Department of Mechanical Engineering Imperial College London Exhibition Road South Kensington LondonSW7 2AZ United Kingdom Brac Business School Brac University Dhaka1212 Bangladesh Industrial Engineering Department College of Engineering King Saud University P.O. Box 800 Riyadh11421 Saudi Arabia State Key Laboratory of Materials Processing and Die Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China

This article presents the finite element modeling and simulation of machining with evolutionary friction, which was obtained from the interactive friction model (IFM). An empirical-numerical approach was used for IFM calibration, and the simulated annealing optimization was used to determine the IFM parameters. As the first step, the validated FEA simulations with constant friction coefficients were used to extract the interfacial parameters (i.e., pressure, sliding velocity, and temperature). Afterward, the interfacial parameters of the marginal nodes were fed into the IFM to optimize the model parameters. The evolution of the coefficient of friction obtained from the calibrated IFM was afterward used to generate the FEA model, which was validated with experimental cutting force. Finally, the performance of the IFM-based FEA model was compared with that of the constant friction coefficient. It was found that the inclusion of the evolution of friction with cutting time caused a shift in the FEA-simulation-based cutting force, feed force, thrust force, and temperature to move in the projected direction of friction. The adopted approach of IFM calibration can be helpful as an alternative to the friction data for machining interfaces, which are challenging to achieve through tribology tests. © 2025 The Authors

关键词： Simulated annealing

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Mechanistic switch in corrosion behavior of magnesium alloy diamond lattice structures induced by argon plasma treatment

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Journal of Magnesium and Alloys 2025年第1期13卷 101-119页

作者： Viviana M.Posadaa Alexandru Marin Tonny Naranjo Juan Ramírez Patricia Fernández-Morales Ken and Mary Alice Lindquist Department of Nuclear Engineering Pennsylvania State UniversityPA USA Department of Mechanical Engineering School of MinesUniversidad Nacional de ColombiaBogotáColombia Department of Nuclear Plasma and Radiological EngineeringCollege of EngineeringUniversity of Illinois at Urbana-ChampaignILUSA Medicine Faculty Universidad Pontificia BolivarianaAntioquiaColombia Corporación para Investigaciones Biológicas AntioquiaColombia Industrial Engineering Faculty Universidad Pontificia BolivarianaAntioquiaColombia Materials Science and Engineering Department Pennsylvania State UniversityUniversity ParkPA16802USA Surface Analysis Laboratory Institute for Nuclear Research PitestiMioveni15400Romania Department of Electronics and Computer Science Pontificia Universidad Javeriana de CaliColombia

Advancing 3D magnesium(Mg)development beyond current limitations requires controlling Mg alloy degradation in pre-designed,low-dimension *** study reveals a mechanistic switch in the corrosion behavior of Mg alloy(3.6%Al,0.8%Zn)diamond lattice structures,induced by plasma nanosynthesis(400 eV Ar^(+)ions,fluence 1×10^(17) ions/cm^(2)).Plasma treatment of the Mg alloy increases surface Mg from 1.5%to 14.5%,enhances carbonate formation,and generates a nanostructured surface with a Mg carbonate layer over an oxide/hydroxide *** vitro and in vivo analyses over 8 wk demonstrate how this treatment fundamentally alters the degradation process and stability of these 3D *** untreated samples initially formed a protective film that subsequently diminished,DPNS-treated samples demonstrated an inverse corrosion behavior.X-ray photoelectron spectroscopy(XPS)and electrochemical impedance spectroscopy(EIS)confirmed the presence of a stable,protective layer composed of magnesium oxide,magnesium hydroxide,and magnesium carbonate on the DPNS-treated *** 14 days,the DPNS-treated sample exhibited a more positive corrosion potential(-0.69 V versus-1.36 V)and a marginally lower current density(0.73 mA/cm^(2)compared to 0.75 mA/c^(2))relative to the *** protective layer,combined with modified surface topology,initiated a core-to-periphery degradation pattern that maintained structural integrity for up to 8 wk *** findings support the conclusion that the DPNS-treated scaffold demonstrates sustained improved corrosion resistance over time compared to the untreated ***-CT revealed plasma-treated samples retained larger struts(504.9±95.3μm at 8 wk)and formed larger H_(2) pockets extending 14.2 mm from the implant center,versus 4.9 mm in *** corrosion behavior switch enhances stability but risks pore clogging,offering insights for tailoring Mg alloy degradation and H_(2) evolution in 3D architectures

关键词： Mg Corrosion resistance Cellular materials Nanotopography Nano-medicine Diirected plasma nanosynthesis

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Technical and economic feasibility assessment for hybrid energy system electricity and hydrogen generation: A case study

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Global Energy Interconnection 2025年第1期8卷 62-81页

作者： Paul C.Okonkwo Samuel Chukwujindu Nwokolo El Manaa Barhoumi Ibrahim B.Mansir Usman Habu Taura Barun Kumar Das Ahmed Bahgat Radwan Wilfred Emori Ephraim Bonah Agyekum Khalid Al Kaaf Mechanical&Mechatronics Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Physics Faculty of Physical SciencesUniversity of CalabarCalabar PMB 1115Nigeria Electrical&Computer Engineering Department Dhofar UniversitySalalah 211the Sultanate of Oman Department of Mechanical Engineering Prince Sattam bin Abdulaziz UniversityAl-Kharj 11942Saudi Arabia Centre for Energy Research and Training Ahmadu Bello UniversityPMB 1045ZariaNigeria Oil&Gas Research Center Sultan Qaboos UniversityMuscat 123the Sultanate of Oman Department of Mechanical Engineering Rajshahi University of Engineering&TechnologyRajshahi 6204Bangladesh Center for Advanced Materials Qatar UniversityDoha 2713Qatar School of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000PR China Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia BorisEkaterinburg 620002Russia Western Caspian University Baku AZ1001Azerbaijan Department of Civil and Environmental Engineering Dhofar UniversitySalalah 211the Sultanate of Oman

Hydrogen is emerging as a promising alternative to fossil fuels in the transportation *** study evaluated the feasibility of estab-lishing hydrogen refueling stations in five cities in Oman,Duqm,Haima,Sur,Al Buraymi,and Salalah,using Hybrid Optimization of Multiple Electric Renewables(HOMER)*** hybrid energy systems,photovoltaic-wind turbine-battery,photovoltaic-battery,and wind turbine-battery were analyzed for each *** indicated that Duqm offers the lowest net present cost(NPC),levelized cost of energy,and levelized cost of hydrogen,making it the most cost-effective ***,Sensitivity analysis showed that as the life of electrolyzer increases during operation,the initial capital expenditure is distributed over a longer operational period,leading to a reduction in the *** so,renewable energy systems produced no emissions which supports Oman’s mission *** comprehensive analysis confirms the feasibility of establishing a hydrogen refueling station in Duqm,Oman,and highlights advanced optimization techniques’superior capability in designing cost-effective,sustainable energy systems.

关键词： Cities Economic indicator Hydrogen production Optimization Solar

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GRIPPY: A VR Grip Controller for Combating Sarcopenia in Elderly

GRIPPY: A VR Grip Controller for Combating Sarcopenia in Eld...

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2025 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops, VRW 2025

作者： Leong, Hoilam Wu, Jiang Lai, Yoke Chin Faulon, Loïc Sun, Xu Lee, Boon Giin University of Nottingham Faculty of Science and Engineering Department of Mechanical Materials and Manufacturing Engineering Ningbo China School of Computer Science China

ISBN: (纸本)9798331514846

As the global population ages, sarcopenia - age-related muscle decline - demands innovative solutions. This paper introduces GRIPPY, a VR grip controller that transforms basic handgrip exercises into immersive, gamified tasks. By integrating sensor-based interaction and VR gameplay, older adults can strengthen grip while maintaining higher motivation. A preliminary test with three participants (ages 68-80) revealed key usability insights, underscoring GRIPPY's potential for enhanced rehabilitation. Future work will refine its design and validate long-term efficacy. © 2025 IEEE.

关键词： Elderly Rehabilitation Grip Strength Immersive Exercise Interactive Training Sarcopenia Virtual Reality

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