检索结果-内蒙古大学图书馆

Aiming at magnesium metal production using domestic resource in Japan

Keikinzoku/Journal of Japan Institute of Light Metals 2024年第10期74卷 463-470页

作者： Takenaka, Toshihide Ohara, Hisashi Hoshino, Takeo Chino, Yasumasa Matsumoto, Toshiharu Inoue, Makoto Faculty of Chemistry Materials and Bioengineering Kansai University 3-3-35 Yamate-cho Osaka Suita-shi564-8680 Japan The Japan Magnesium Association Chuou-ku Tokyo Japan Department of Material Engineering Graduate of Engineering The University of Tokyo Bunkyo-ku Tokyo Japan Department of Material and Chemistry National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba-shi Japan Tobata Seisakusho Co. Ltd. Kitakyushu-shi Fukuoka Japan Department of Mechanical Engineering National Institute of Technology Toyama College Toyamashi Toyama Japan

来源：评论

学校读者我要写书评

暂无评论

Parametric Study on Abrasive Wear of Reinforced Polytetrafluroethylene Composites Using Taguchi Model 5th

Parametric Study on Abrasive Wear of Reinforced Polytetraflu...

引用

5th International Conference on Advances in Manufacturing and materials engineering, ICAMME 2022

作者： Ibrahim, Musa Alhaji Tambaya, Magaji Yusuf, Auwalu Gidado Auwal, S.T. Kurniawan, D. Ramesh, S. Department of Mechanical Engineering Faculty of Engineering Kano University of Science and Technology P.M.B 3244 Kano State Wudil Nigeria Faculty of Engineering Universiti Teknologi Brunei Tungku Highway Gadong1410 Brunei Center of Advanced Manufacturing and Material Processing Department of Mechanical Engineering Faculty of Engineering University of Malaya Kuala Lumpur50603 Malaysia

ISBN: (纸本)9789811995088

Over the years reinforced polymer composites are extensively used in aircraft, automobile and structural industries owing to their high specific modulus and strength. However, the main issue is the method used to quantify the abrasive wear which often does not represent the true nature of the composite behaviour. This study presents optimization of parameters which affect the abrasive wear rate of reinforced polytetrafluoroethylene (PTFE) composites using Taguchi model. Friction and wear experiments were performed on a pin-on-disc arrangement as per ASTM G99 standard. A plan of experiment based on Taguchi design was used to obtained data in a controlled way. Load, grit size, distance and speed were considered as process parameters. Taguchi L9 orthogonal array was chosen to find the optimum parameter settings. Analysis of variance (ANOVA) was applied to determine parameters that most significantly affect the abrasive wear rate of the reinforced PTFE composites. Confirmation test was conducted to validate the optimized conditions. Taguchi optimization model revealed different combinations of process parameters for desired coefficient of friction (COF) and specific wear rate (Ks). The study concluded that that the load was the most significant parameter that controlled COF and Ks with a contribution of 82.13% and 81.54%, respectively. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Analysis of variance (ANOVA)

来源：评论

学校读者我要写书评

暂无评论

Exceptional thermal stability of ultrafine-grained long-period stacking ordered Mg alloy

引用

Rare Metals 2022年第5期41卷 1537-1542页

作者： Shuai-Jun Ding Li-Dong Xu Xue-Cheng Cai Shen-Xiang-Yu Gu Kang-Kang Wen Hui Yu Zheng Chen Bao-Ru Sun Sheng-Wei Xin Tong-De Shen State Key Laboratory of Metastable Materials Science and Technology Clean Nano Energy CenterYanshan UniversityQinhuangdao 066004China Department of Mechanical Engineering the University of Hong KongHong Kong 999077China School of Material Science and Engineering China University of Mining and TechnologyXuzhou 221116China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300132China

The hierarchical long-period stacking ordered(LPSO)architecture composed mainly of an ultrafine-grained LPSO matrix has been demonstrated to be a feasible design strategy for achieving ultra-strong Mg ***,we report an... 详细信息

关键词： grain alloy alloy

来源：评论

学校读者我要写书评

暂无评论

Accurate prediction of oxygen vacancy concentration with disordered A-site cations in high-entropy perovskite oxides

引用

npj Computational materials 2023年第1期9卷 2053-2065页

作者： Jiyun Park Boyuan Xu Jie Pan Dawei Zhang Stephan Lany Xingbo Liu Jian Luo Yue Qi School of Engineering Brown UniversityProvidenceRI 02912USA Department of Physics Brown UniversityProvidenceRI 02912USA Department of Chemical Engineering and Materials Science Michigan State UniversityEast LansingMI 48824USA Program of Materials Science and Engineering University of California San DiegoLa JollaCA 92093USA Materials Science Center National Renewable Energy LaboratoryGoldenCO 80401USA Department of Mechanical and Aerospace Engineering Benjamin M.Statler College of Engineering and Mineral ResourcesWest Virginia UniversityMorgantownWV 26506USA Department of NanoEngineering University of California San DiegoLa JollaCA 92093USA

Entropic stabilized ABO_(3) perovskite oxides promise many applications,including the two-step solar thermochemical hydrogen(STCH)*** binary and quaternary A-site mixed{A}FeO_(3) as a model system,we reveal that as more cation types,especially above four,are mixed on the A-site,the cell lattice becomes more cubic-like but the local Fe–O octahedrons are more *** comparing four different Density Functional Theory-informed statistical models with experiments,we show that the oxygen vacancy formation energies(E^(f)_(V))distribution and the vacancy interactions must be considered to predict the oxygen non-stoichiometry(δ)*** STCH applications,the E^(f)_(V) distribution,including both the average and the spread,can be optimized jointly to improveΔδ(difference ofδbetween the two-step conditions)in some hydrogen production *** model can be used to predict the range of water splitting that can be thermodynamically improved by mixing cations in{A}FeO_(3) perovskites.

关键词： perovskite vacancy oxides

来源：评论

学校读者我要写书评

暂无评论

Ultrasonic multi-frequency piezoelectric transducer for generation different sound pressure field patterns 69

Ultrasonic multi-frequency piezoelectric transducer for gene...

引用

69th International Conference on Vibroengineering

作者： Čeponis, Andrius Vainorius, Darius Kilikevičienė, Kristina Kilikevičius, Artūras Department of Engineering Graphics Faculty of Fundamental Sciences Vilnius Gediminas Technical University Vilnius Lithuania Department of Mechanical and Material Engineering Faculty of Mechanics Vilnius Gediminas Technical University Vilnius Lithuania Institute of Mechanical Science Faculty of Mechanics Vilnius Gediminas Technical University Vilnius Lithuania Laboratory of Experimental Mechanics Institute of Mechanical Science Faculty of Mechanics Vilnius Gediminas Technical University Vilnius Lithuania

The paper represents numerical and experimental investigation of ultrasonic piezoelectric transducer which operation is based on three different vibration modes. Multi-frequency operation of the transducer allows to obtain sound pressure fields with different patterns, sound fields intensities and frequencies which allows to obtain more flexible and adjustable agglomeration process of fine and ultrafine. Results of numerical investigations have shown that vibration modes of transducer at 25.83 kHz, 34.73 kHz and 52.41 kHz frequencies are suitable for acoustic pressure generation. Moreover, the calculations revealed that at these frequencies sound pressure levels (SPL) reaches up to 142 dB while SPL patterns at different frequencies are different. Experimental investigations have confirmed results of numerical investigations and showed that resonant frequencies of transducer are at 25.65 kHz, 31.1 kHz, 50.8 kHz while SPL values reaches up to 132.5 dB. © 2024 Andrius Čeponis, et al.

关键词： Piezoelectric transducers

来源：评论

学校读者我要写书评

暂无评论

Enhancing efficiency and stability of organic solar cells through a simplified four-step synthesis of fully non-fused ring electron acceptor

引用

Journal of Energy Chemistry 2024年第6期93卷 601-608,I0015页

作者： Chenyang Han Huanhuan Gao Yanna Sun Yuanyuan Kan Zhaozhao Bi Wei Ma Yani Zhang Juan Antonio Zapien Yingguo Yang Ke Gao College of New Energy Xi’an Shiyou UniversityXi’an 710065ShaanxiChina Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Institute of Frontier ChemistrySchool of Chemistry and Chemical EngineeringShandong UniversityQingdao 266237ShandongChina State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049ShaanxiChina Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong 99907China School of Microelectronics Fudan UniversityShanghai 200433China

Design and synthesis of superior cost-effective non-fullerene acceptors(NFAs)are still big challenges for facilitating the commercialization of organic solar cells(OSCs),yet to be ***,two medium bandgap fully non-fused ring electron acceptors(NFREAs,medium bandgap,i,e.,1,3-1,8 eV),namely PTR-2Cl and PTR-4Cl are synthesized with only four steps by using intramolecular noncovalent interaction central core,structured alkyl side chain orientation linking units and flanking with different electron-withdrawing end *** them,PTR-4C1 exhibits increased average electrostatic potential(ESP)difference with polymer donor,enhanced crystallinity and compactπ-πstacking compared with the control molecule *** a result,the PTR-4Cl-based OSC achieved an impressive power conversion efficiency(PCE)of 14.72%,with a much higher open-circuit voltage(V_(OC))of 0.953 V and significantly improved fill factor(FF)of 0.758,demonstrating one of the best acceptor material in the top-performing fully NFREA-based OSCs with both high PCE and V_(OC).Notably,PTR-4Cl-based cells maintain a good T_80lifetime of its initial PCE after over 936 h under a continuous thermal annealing treatment and over1300 h T_(80)lifetime without *** work provides a cost-effective design strategy for NFREAs on obtaining high V_(OC),efficient exciton dissociation,and ordered molecular packing and thus high-efficiency and stable OSCs.

关键词： Organic solar cells Fully non-fused ring acceptors End group engineering Morphology regulation High efficiency

来源：评论

学校读者我要写书评

暂无评论

Interfacial Reaction between the Steel and the Al2O3-MgO-C Refractory

Interfacial Reaction between the Steel and the Al2O3-MgO-C R...

引用

第九届国际耐火材料学术会议

作者： ZHAO Mingzhe REN Qiang ZHANG Lifeng School of Materials Science and Engineering Yanshan University School of Mechanical Engineering Yanshan University School of Mechanical and Material Engineering North China University of Technology

In the current study, laboratory experiments were performed to investigate the interfacial reaction between the molten steel and the AlO-MgO-C refractory, and the self-reaction of the AlO-MgO-C refractory and the interaction between stainless steel and AlO-MgO-C refractory were studied. For the self-reaction experiment, a dense MgO-AlO reaction layer with a 66.8 μm thickness at the surface of the refractory was observed. Meanwhile, the AlOparticle in the refractory was complete wrapped by a MgO-AlO reaction layer. The MgO-AlO layer can effectively inhibited the degradation of the AlO-MgO-C refractory. For the interfacial reaction between the steel and the AlO-MgO-C refractory, a Ti-Al-Mg-O reaction layer with a 78 μm was generated at the interface between the steel and the MgO-AlO layer. Meanwhile a dense Al-Mg-Ti-O layer was observed at the interface between refractory and Ti-Al-Mg-O layer. The dissolved Ti in the steel reacts with AlO particle of the refractory to form Ti-Al-Mg-O reaction layer, and inhibit the formation of MgO-AlO layer. Before the reaction, the composition of inclusion main were TiO, CaO, AlO,and MgO. After the reaction, the composition of inclusions in the steel obviously changed due to the interaction between the molten steel and refractory. As the reaction time increased, the AlO-MgO-C refractory continuously provide Mg and Al to the steel,thereby led to the average MgO contents in inclusions increased from 14.0 wt.% to 20.6 wt.% and the average AlO contents increased from 20.7 wt.% to35.4 wt.%. In addition, due to the formation of Ti-Al-Mg-O layer, the average TiO contents decreased from 42.9 wt.% to 33.1 wt.%. The average SiO contents increased from 0.4 wt.% to 3.5 wt.%,and the average CaO contents significantly decreased from 22.1 wt.% to 7.4 wt.%. Meanwhile, the number density of inclusions slightly decreased from10.7mm-2 to 9.4mm-2, and the average diameter of the inclusions decreased from 2.7 μm to 2.4 μm.

关键词： interfacial reaction MgO-Al2O3 layer Al2O3-MgO-C refractory

来源：评论

学校读者我要写书评

暂无评论

Design of the Continuous Gravity-Driven Multiple-Effect Thermal System (G-METS) for Efficient Low-Cost Magnesium Recycling

Design of the Continuous Gravity-Driven Multiple-Effect Ther...

引用

Magnesium Technology Symposium held during the 152nd TMS Annual Meeting and Exhibition, TMS 2023

作者： Sehar, Daniel Mcarthur Espinosa, Gabriel Telgerafchi, Armaghan Ehsani Chinwego, Chinenye Lynch, Keira Perrin, Benjamin Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States 100 Institute Rd WorcesterMA01609 United States

ISBN: (纸本)9783031226458

Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight. This study continues prior work on magnesium recycling using multiple-effect distillation with gravity as the parameter to create the pressure difference between effects, called G-METS. The long-term vision is for continuous distillation, but experiments to date have only used batch distillers with maximum rate of 1 kg/h. and minimum energy consumption of 2 kWh/kg. This study presents the design of laboratory-scale continuous distiller including a custom-made furnace to sustain a high-power density and temperature gradient for rapid boiling and efficient recovery of magnesium. © The Minerals, Metals & materials Society 2023.

关键词： Distillation

来源：评论

学校读者我要写书评

暂无评论

Optimal Strain Gauge Placement on Testing Samples for Assessing the Effect of Residual Stress in Weld Fatigue

Optimal Strain Gauge Placement on Testing Samples for Assess...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Even Englund R.M. Chandima Ratnayake Department of Mechanical and Structural Engineering and Material Science University of Stavanger Stavanger Norway

ISBN: (数字)9798350360868

ISBN: (纸本)9798350360875

Strain gauges are frequently used for monitoring and for measure of the deformation or strain of a material under stress. They are widely used in fatigue degradation testing, which are methods to evaluate the performance and durability of structures and components under varying loads and cycles. They are also applied on small-scale test samples used for fatigue testing of welds where they are used in determination of hot spot stress that is found to give good reference stress approximations for the fatigue-loaded welded joints. The meticulous selection of optimal strain gauge placement on welded test samples is crucial for capturing the complicated impact of residual stresses. The careful consideration of sample preparation and extraction processes holds paramount significance, as it directly dictates the precision and reliability of the ensuing fatigue test results. This article highlights the significance of placement of strain gauges on test samples for fatigue testing of welds and for the determining residual stress release utilizing the sectioning method. The location of strain gauges should consider factors such as size of the test sample, thickness, weld bead profile, and potential stress concentrations. There have not been given any standard placement and guidelines for location of strain gauges on small-scale test samples or for measuring relies of residual stress applying the section method. Drawing upon a comprehensive literature survey of established principles and guidelines regarding strain gauge placement, this article focuses to offer instructive guidance on the judicious application of strain gauges in the examination of small-scale welded test samples. Furthermore, the paper aims to reveal best practices for employing strain gauges during the extraction process to ascertain the extent of residual stress relief.

关键词： Uncertainty Welding Spot welding Strain measurement Fatigue Residual stresses Testing

来源：评论

学校读者我要写书评

暂无评论

Wearable and interactive multicolored photochromic fiber display

引用

Light(science & Applications) 2024年第3期13卷 454-465页

作者： Pan Li Yuwei Wang Xiaoxian He Yuyang Cui Jingyu Ouyang Ju Ouyang Zicheng He Jiayu Hu Xiaojuan Liu Hang Wei Yu Wang Xiaoling Lu Qian Ji Xinyuan Cai Li Liu Chong Hou Ning Zhou Shaowu Pan Xiangru Wang Huamin Zhou Cheng-Wei Qiu Yan-Qing Lu Guangming Tao State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and Engineering and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Vascular Aging(HUST) Ministry of EducationWuhan 430030China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Performing Arts Wuhan Conservatory of MusicWuhan 430060China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China School of Fashion Beijing Institute of Fashion TechnologyBeijing 100029China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive ***,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight ***,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light *** designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the *** impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission *** addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single *** prepared fibers on mass-produced kilometer-long using the thermal drawing *** fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as *** work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

关键词： fiber interactive colored

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：