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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

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Calculation method between heat treatment simulation and computer fluid dynamics

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materials Performance and Characterization 2018年第2期8卷

作者： Sugimoto, Tsuyoshi Taniguchi, Kouichi Yamada, Shigenori Matsuno, Toshiyuki Sonobe, Masaru Ju, Dong-Ying Department of Material Engineering Nissan Motor Co. Ltd. 560-2 Okatsukoku Atsugi Kanagawa243-0192 Japan Department of Engineering Saitama Institute of Technology Fuseiji 1690 Fukaya Saitama369-0293 Japan Parts Process Engineering Department Machining Process Engineering Section No. 2 JATCO Ltd. 700-1 Imaizumi Fuji Shizuoka417-8585 Japan Environmental Material and Manufacturing Engineering Development Department Suzuki Motor Corp. 300 Takatsuka-cho Minami-ku Hamamatsu Shizuoka432-8611 Japan Fujikoshi Co. Ltd. 176 Okake Namerikawa Toyama936-0802 Japan

For vehicle drivetrain system parts such as gears, case hardening heat treatment with carburizing is well used to improve wear and rolling contact fatigue properties. However, distortion would occur during heat treatment processes, which may be a problem in improving the precision of the gear shape. Predicting distortion behavior accurately by heat treatment simulation method could help us achieve a good heat treatment quality and parts' shape accuracy. In this article, heat treatment simulation that is the predicting method from cooling situation to heat treatment distortion and computer fluid dynamics that is the predicting method from flow condition to cooling phenomena are combined. This combined method can estimate heat treatment quality on mass production treatment, especially in stable flow condition or some cooling conditions. However, especially for a continuously variable transmission pulley quenched in high-speed flow oil condition, the accuracy of heat treatment simulation is lower than other conditions. We estimated this to be the effect of turbulence generated in the flow. © 2018 by ASTM International.

关键词： Cooling

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Microstructural control and mechanical properties of low-cost titanium alloys for next generation aircrafts

Microstructural control and mechanical properties of low-cos...

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8th Pacific Rim International Congress on Advanced materials and processing 2013, PRICM 8

作者： Niinomi, Mitsuo Nakai, Masaaki Itsumi, Yoshio Murakami, Shogo Oyama, Hideto Abe, Wataru Hieda, Junko Cho, Ken Akahori, Toshikazu Institute for Materials Research Tohoku University Sendai 980-8577 Japan Titanium Research and Development Section Kobe Steel Ltd. Takasago 676-8670 Japan Materials Research Laboratory Kobe Steel Ltd. Kobe 651-2271 Japan Material and Process Engineering Section Aero Space Co. Kawasaki Heavy Industry Ltd. 1 Kawasaki-cho Kagamigahara 504-8710 Japan Faculty of Science and Technology Department of Materials Science and Engineering Meijo University 1-501 Shiogamaguchi Tempaku-ku Nagoya 468-8502 Japan

ISBN: (纸本)9781632660008

New titanium alloys have been developed for use in next-generation aircrafts by adding low-cost elements such as C, Fe, Al and Cr. Some of the newly developed alloys are Ti-4.5Al-2Mo-1.6V-0.5Fe-0.3Si-0.03C, referred to as KS Ti-9, and Ti-4.5Al-2.5Cr-1.2Fe-0.1C, referred to as KS Ti-531C. As opposed to the widely used Ti-6Al-4V (Ti64), KS Ti-9 can be rolled at much lower temperatures without employing pack-rolling, and the anisotropy in its mechanical strength is significant. Microstructural control process to reduce the anisotropy in the mechanical strength of KS Ti-9 has been investigated. Anisotropy controlling treatment (ACT) is found to be effective to reduce the anisotropy in the mechanical strength of KS Ti-9. KS Ti-531C, with good mechanical properties at room temperature, similar to those of Ti64, and high hot-workability with low flow stress during deformation at high temperatures, similar to that of commercially pure titanium (CPTi), has been developed for fabricating forged or extruded components. There still exists a possibility of the precipitation of titanium carbides depending on the kind of the microstructural control process used. The mechanical properties and the fatigue strength of KS Ti-531C with different microstructures have been investigated, (α + β)-annealed KS Ti-531C with an equiaxed α structure exhibits better ductility and fatigue strength than β-annealed KS Ti-531C with the Widmanstätten α structure because of the presence of titanium carbide precipitates in the β-annealed KS Ti-531C.

关键词： Titanium alloys

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Overview and Lessons from More Than a Decade of Feeder Life Management

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Journal of Energy and Power engineering 2013年第11期7卷 2164-2173页

作者： Aman Usmani Zane Walker Manager and Principal Consultant Engineering Services AMEC NSS Power and Process Americas M5G 1E6 Ontario Canada Chemistry and Material Section Candu Energy Inc. Mississauga L5K 1BI Ontario Canada

This paper provides an overview of the degradation in CANDU^a （Canadian Deuterium Uranium） feeders in operating plants observed from the mid 1990s onward. The degradation has been dominated by feeder wall thinning, caused by FAC （flow accelerated corrosion） and feeder cracking. This paper summarizes the industry＇s response to the discovery of these two degradation mechanisms and the methodologies, tools and technologies developed to monitor the degradation and assess the continued fitness for service to manage the plant life. This paper identifies some of the lessons gained from more than a decade of industry effort, and discusses how these lessons are being implemented in the refurbished and new CANDU plants. CANDU^a is a registered trademark of Atomic Energy of Canada Limited.

关键词： CANDU feeder degradation wall thinning cracking FAC.

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Influences of homogenizing temperature and excess Si on age-hardening behavior of Al-Mg-Si alloys

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Keikinzoku/Journal of Japan Institute of Light Metals 2009年第6期59卷 305-309页

作者： Sakurai, Takeo Komatsu, Shin-Ya Kono, Norio Material and Process Research Section Aluminum Sheets and Coils Research Department Kobe Steel Ltd. 15 Kinugaoka Moka-shi Tochigi 321-4367 Japan Faculty of Chemistry Materials and Bioengineering Kansai University Suita-shi Osaka Japan Faculty of Engineering Chiba Institute of Technology Narashino-shi Chiba Japan

Influences of homogenizing temperature and excess Si on age-hardening behavior of Al-0.93%Mg2Si alloy were investigated. From size distribution obtained by image analysis of secondary phase particles on SEM micrographs, amount of Mg-Si compound in the excess Si alloy was decreased from that in the as-cast state by homogenization at 823 K for 7.2 ks. The amount of Mg-Si compound after homogenization at 773 K lays between those in the as-cast and 823 K homogenized states. Estimating from the analyzed chemical composition, complete dissolving temperature of Mg and Si of the excess Si alloy is 782 K. Conductivity IACS% was decreased with elevating temperature of homogenization, confirming the decrease in amount of the Mg-Si compound and increase in solute concentration. Though the complete dissolving temperature of Mg and Si is elevated, excess addition of only 0.18%Si brings about a strengthening larger than the previously reported alloy containing 0.47 %Cu.

关键词： Silicon alloys

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Non-graphite lubricant application experience to integration Pulley for Continuously Variable Transmissions (CVT)

Non-graphite lubricant application experience to integration...

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9th International Conference on Technology of Plasticity, ICTP 2008

作者： Kato, Naoki Sunazaki, Takahito Ueno, Kanji Forging Section of Manufacturing Division No.2 JATCO Ltd Japan Material Process Engineering Department Production Division JATCO Ltd Japan

This report centers on the forging pulleys which were applied for new CVT unit and covers how to select a Lubricant for hot forging by applying a method of lubricant's evaluation which is called "spike test&q... 详细信息

ISBN: (纸本)9788957081525

关键词： Pulleys

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FLAMMABILITY AND TOXICITY OF COMPOSITE-materialS FOR MARINE VEHICLES

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NAVAL ENGINEERS JOURNAL 1990年第5期102卷 45-54页

作者： SEVART, JL GRIFFIN, OH GURDAL, Z WARNER, GA Jeffrey L. Sevart:is a native of Kansas and a 1985 graduate of Kansas State University with a B.S. in mechanical engineering (magna cum laude). After working as a stress analysis engineer at Boeing Military Airplane Company in Wichita Kans. he attended Virginia Polytechnic Institute and State University and received an M.S. in engineering mechanics in February 1988. He currently resides in Akron Ohio working as a research engineer in tire composites research at The Goodyear Tire and Rubber Company. O. Hayden Griffin Jr.:received his B.S. and M.S. in mechanical engineering from Texas Tech University in 1970 and 1971 respectively. He received his Ph.D. in engineering mechanics from Virginia Polytechnic Institute and State University in 1980. Prior to joining the faculty of Virginia Polytechnic Institute and State University as associate professor of engineering science and mechanics in September 1985 he was employed at the U.S. Naval Surface Warfare Center (Dahlgren Virginia) BF Goodrich Tire Group (Akron Ohio) the Bendix Advanced Technology Center (Columbia Maryland) and the Johns Hopkins University Applied Physics Laboratory (Laurel Maryland). He is currently an associate director of the Virginia Institute for Material Systems. He is a registered professional engineer in Virginia and is a member of the American Society of Mechanical Engineers and the American Society for Composites. Zafer Gürdal:received his M.S. in mechanical and aerospace engineering from Illinois Institute of Technology in 1981 and his Ph.D. in aerospace engineering from Virginia Polytechnic Institute and State University in 1985. He worked as a research associate in the Aerospace and Ocean Engineering Department at Virginia Tech before joining the Engineering Science and Mechanics Department as an assistant professor in September 1985. Professor Gürdal's research interests include: composite structures failure mechanics of composites structural optimization and damage tolerant design. He is a member of the American Institute

Characteristics of both thermoplastic and thermoset composite materials as they pertain to marine vehicle applications are discussed. Comparison of various material selection factors such as strength, damage and moisture resistance, and flammability and toxicity as well as cost and availability of thermoset and thermoplastic composite materials are presented. Methods for testing and reducing the flammability and toxicity are discussed. Many commercially available composite systems are reported to provide favorable characteristics for marine applications. Although there seems to be a need for improved production technology for thermoplastics, they present potential advantages in physical properties over thermoset composites.

关键词： Composite materials

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