检索结果-内蒙古大学图书馆

High-yield carbon nanofibers derived from nanoporous Cu catalyst alloyed with Ni for sodium storage with high cycling stability

引用

International Journal of Minerals,Metallurgy and materials 2025年第4期32卷 925-935页

作者： Zhenyang Yu Changqi Duan Qi Sun Jinhu Ma Yifang Zhang Mengmeng Zhang Delin Zhang Zhijia Zhang Zhiyan Jia Yong Jiang School of Mechanical Engineering Tiangong UniversityTianjin 300387China School of Material Science and Engineering State Key Laboratory of Separation Membrane and Membrane ProcessesTiangong UniversityTianjin 300387China School of Electronic and Information Engineering Institute of Quantum Materials and DevicesTiangong UniversityTianjin 300387China Cangzhou Institute of Tiangong University Cangzhou 061000China Jiangsu Fuyuan Mustard Seed Space New Material Research Institute Co. Ltd.Xuzhou 221100China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

High-performance and low-cost anode materials are critical for superior sodium-ion batteries(SIBs).Herein,high-yield porous carbon nanofiber(CNF)anode materials(named CNFs@Cu–Ni)are prepared by chemical vapor deposition using a specialized nanoporous Cu–Ni alloy *** functional theory calculations indicate that Ni incorporation results in a shift of the d-band center of the catalyst from−2.34157 to−1.93682 *** phenomenon elucidates the remarkable adsorption capacity of the Cu–Ni catalyst toward C2H2,thereby facilitating the catalytic growth of high-performance *** this approach,a superior yield of 258.6%for deposited carbon is reached after growth for 1 *** CNFs@Cu–Ni anode presents an outstanding discharge capacity of 193.6 mAh·g^(−1) at 1.0 A·g^(−1)over 1000 cycles and an exceptional rate capability by maintaining a capacity of 158.9 mAh·g^(−1)even at 5.0 A·g^(−1)in an ether-based *** also exhibits excellent performance in the CNFs@Cu–Ni//NVP full battery attributed to the presence of abundant Na+adsorption sites on its *** study presents a new concept for the advancement of high-performance carbonaceous electrodes for SIBs.

关键词： carbon nanofibers chemical vapor deposition Cu-based catalyst anode materials sodium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Study on the Effect of Nanoparticles Extracted from Banyan Aerial Root Reinforced Porcelain Filler Blended PMMA Composite

引用

Journal of The Institution of Engineers (India): Series D 2024年 1-6页

作者： Raja, Thandavamoorthy Devarajan, Yuvarajan Material Science Lab Department of Prosthodontics Saveetha Dental College and Hospitals SIMATS Saveetha University Chennai India Department of Mechanical Engineering Saveetha School of Engineering SIMATS Saveetha University Chennai India

This study investigates the properties of a novel composite material designed for dental applications, consisting of nanoparticles extracted from banyan aerial roots, reinforced with porcelain filler, and blended into a polymethyl methacrylate (PMMA) matrix. The primary focus is on evaluating the antimicrobial efficacy and analyzing the functional characteristics of the composite. Antibacterial testing against common oral pathogens demonstrates significant microbial growth inhibition, highlighting the composite’s potential in preventing oral infections. X-ray Diffraction analysis reveals the crystalline nature of the composite, with distinct peaks confirming the presence of PMMA, banyan root nanoparticles, and porcelain filler. The sharp peak 2θ at around 29.2° with 2987 intensity is characteristic of the PMMA matrix, showcasing its semi-crystalline structure. Scanning Electron Microscopy examination shows a uniform dispersion of nanoparticles and a smooth surface morphology, indicative of effective material integration and potential for favorable mechanical properties. Energy Dispersive X-ray analysis complements SEM by identifying the elemental composition of 1.25% (Si) and 1.09% (Mg) verifying the inclusion of all components. The findings of this study suggest that the banyan root nanoparticle-reinforced porcelain filler blended with PMMA composite possesses promising antimicrobial properties, along with desirable physical and chemical characteristics can be used for medical instruments. © The Institution of Engineers (India) 2024.

关键词： Nanoparticles

来源：评论

学校读者我要写书评

暂无评论

Impact of aging temperature on the metallurgical and dry sliding wear behaviour of LM25 / Al2O3 metal matrix composite for potential automotive application

引用

International Journal of Lightweight materials and Manufacture 2023年第3期6卷 416-433页

作者： Ravinath, Harinath Ahammed I, Ijas P, Harigovind Devan S, Achu Senan V R, Aravind Shankar, Karthik V. S, Nandakishor Department of Mechanical Engineering Amrita Vishwa Vidyapeetham Amritapuri India Department of Material Science and Engineering KTH Royal Institute of Technology Stockholm100 44 Sweden

The current study exhibits the influence of aging temperatures on the metallurgical, hardness, and dry-sliding wear behaviour of LM25 (Al-6.6Si-0.2Mg) alloy reinforced with Al2O3 particles. The LM25 alloy reinforced with 10 wt% of alumina particles was fabricated using the liquid metallurgy route followed by solutionizing and aging. The baseline LM25 alloy and its composite were solutionized at 538 °C for 8 h and were aged at 155, 165, and 175 °C for 12 h. Optical, FESEM, EDS, and X-ray diffraction analysis were done on the fabricated alloy and its composite in all conditions. The microstructure revealed the formation of the Mg2Si phase in the baseline alloy and the MgAl2O4 spinel generated at the composite interface of the aluminium matrix. The heat-treated alloy and composites were tested for their hardness on the Vickers microhardness tester. It was concluded that the aging temperature of 155 °C displayed significant enhancement in hardness values for tested samples. The heat-treated alloy and composite samples displayed an increment of 96% and 55% in hardness values relative to LM25. The wear rate and friction coefficient for the fabricated samples were analyzed using the pin-on-disc tribometer under dry sliding conditions. The hardness value increased from the as-cast state to samples aged at 155 °C and then decreased at 165 and 175 °C. Based on the wear study, a 14% and 25% decrease in the wear rate values for heat-treated alloy and composites were noted when sliding velocity was increased from 1 m/s to 3 m/s. However, the coefficient of friction (COF) decreased by 23% and 13% for the specimens in the same conditions. Furthermore, a similar trend was displayed by age-hardened LM25 alloy and the composite when subjected to varying load (5, 10, 15 N) condition. Lastly, the worn-out surface mechanisms were examined using FESEM analysis. Amongst the investigated samples, LM25/10 wt% Al2O3 composite aged at 155 °C revealed the least wear rate when subjected to an e

关键词： Hardness

来源：评论

学校读者我要写书评

暂无评论

Effect of lanthanum on inclusions in non-oriented electrical steel slabs

引用

Journal of Iron and Steel Research International 2024年第7期31卷 1680-1691页

作者： Qiang Ren Zhi-yuan Hu Yun-xia Liu Wei-cheng Zhang Zi-qi Gao Li-feng Zhang School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Research and Development Department Shougang Zhixin Qian'an Electromagnetic Material Co.Ltd.Qian'an 064400HebeiChina School of Mechanical and Materials Engineering North China University of TechnologyBeijing 100144China

The effect of lanthanum on the characteristics of inclusions in the slab of non-oriented electrical steels was investigated through industrial trials and thermodynamic *** number,size,and chemical composition of inclusions in the surface,one-quarter of thickness and the center of slabs with and without lanthanum addition were statistically analyzed using an automatic inclusion analysis *** the lanthanum-free slab,inclusions were predominately ***_(2)O_(3),MgO,and AlN as well as a small number of Al_(2)O_(3)-MgO-CaO and *** number densities of oxide inclusions and AlN decreased from the surface to the center of the slab,which was ascribed to the difference in cooling intensity during the continuous *** the steel with lanthanum addition,inclusions were modified into LaAlO_(3) and La_(2)O_(2)S and gradually transformed into dual-phase MgO-La_(2)S3 with an increasing distance from the slab surface due to the reaction between the lanthanum-containing inclusion and the steel *** uneven distribution of oxide inclusions along the thickness of the slab was eliminated in the lanthanum-bearing slab because the dissolved oxygen was remarkably decreased by ***-bearing inclusions were more likely to agglomerate AlN by inducing the heterogeneous nucleation of AlN on their surface,while small-size ***_(2)O_(3) inclusions hardly showed a coarsening effect on the size of AlN.

关键词： Lanthanum-Inclusion Non-oriented electrical steel Aluminum nitride Heterogenous nucleation

来源：评论

学校读者我要写书评

暂无评论

Effects of friction stir processing and nano-hydroxyapatite on the microstructure,hardness,degradation rate and in-vitro bioactivity of WE43 alloy for biomedical applications

引用

Journal of Magnesium and Alloys 2024年第1期12卷 209-224页

作者： Bo Wu Farazila Yusof Fuguo Li Huan Miao A.R.Bushroa Mohd Ridha Bin Muhamad Irfan Anjum Badruddin Mahmoud Z.Ibrahim Department of Mechanical Engineering Faculty of EngineeringUniversiti MalayaKuala Lumpur 50603Malaysia Centre of Advanced Manufacturing and Material Processing(AMMP Centre) Universiti MalayaKuala Lumpur 50603Malaysia Center of Foundation studies in Science Universiti MalayaKuala Lumpur 50603Malaysia State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Mechanical Engineering Department College of EngineeringKing Khalid UniversityAbha 61421Saudi Arabia Design and Production Engineering Faculty of EngineeringAin Shams UniversityCairo 11517Egypt

Nowadays,magnesium alloys are emerging in biomedical implants for their similar properties to natural ***,the rapid degradation of magnesium alloys in biological media hinders successful *** of microstructure,as well as reinforcement particles can significantly improve the degradation *** this work,multi-pass friction stir processing(FSP)was proposed to synthesize WE43/nano-hydroxyapatite(n HA)surface composite,the microstructure,reinforced particle distribution,micro-hardness,corrosion behavior and in-vitro bioactivity were *** subsequent FSP passes of WE43 alloy and WE43/n HA composite refined the grain size which was reduced by 94.29%and 95.92%(2.63 and 1.88μm,respectively)compared to base metal after three *** resulted in increasing the microhardness by 120%(90.86 HV0.1)and 135%(105.59 HV0.1)for the WE43 and WE43-n HA,*** is found that increasing FSP passes improved the uniform distribution of n HA particles within the composite matrix which led to improved corrosion resistance and less degradation *** corrosion rate of the FSPed WE43/n HA composite after three passes was reduced by 38.2%(4.13 mm/year)and the degradation rate was reduced by 69.7%(2.87 mm/y).This is attributed to secondary phase(Mg24Y5and Mg41Nd5)particle fragmentation and redistribution,as well as a homogeneous distribution of n ***,the growing Ca-P and Mg(OH)2layer formed on the surface represented a protective layer that reduced the degradation *** wettability test revealed a relatively hydrophilic surface with water contact angle of 49.1±2.2°compared to 71.2±2.1°for base ***,biomineralization test showed that apatite layer grew after immersion 7d in simulated body fluid with atomic ratio of Ca/P 1.60 approaching the stoichiometric ratio(1.67)indicating superior bioactivity of FSPed WE43/n HA composite after three *** results raise that the grain refinement by FSP and introduction of n HA partic

关键词： Friction stir processing Magnesium-based composite Nano-hydroxyapatite Corrosion behavior In-vitro bioactivity

来源：评论

学校读者我要写书评

暂无评论

Hybrid air conditioning and seawater desalination system assisted by solar energy: thermoeconomic investigation and optimization

引用

Journal of engineering and Applied science 2024年第1期71卷 148页

作者： Yosry, Nashwa Elgendy, Essam Mostafa, Ahmed Fatouh, Mohamed Mechanical Power Engineering Department Faculty of Engineering at El-Mattaria Helwan University Cairo Egypt Mechanical Engineering Department College of Engineering & ampTechnology at Arab Academy for Science Technology & ampMaritime Transport Sheraton Cairo Egypt Energy and Renewable Energy Engineering Program Faculty of Engineering and Technology Egyptian Chinese University Ain Shams Egypt

The demand for freshwater has become progressively critical due to population growth and water scarcity. The current work investigates the energetic performance of a hybrid absorption refrigeration and desalination system. A parametric study for the system operating conditions has been performed to get the optimal conditions. Also, economic analysis and a multi-objective optimization method are used with the aim of maximizing the energy utilization factor of the system and minimizing total costs. The specific cost of desalinated water from the multi-objective optimization is calculated as (1.728 Cent/L) with the greatest energy utilization factor of (2.214). It turns out that, the system performs optimum at condensation and generation temperatures of 30 and 65 °C respectively, with resultant COP and GOR of 0.84 and 1.37. Using the optimum conditions, TRNSYS has been used to investigate the transient performance of the system for Marsa–Matrouh City in Egypt. The cooling and freshwater demands are 10 kW and 24 L/h. It was concluded that the input energy required to run the hybrid system decreased by about 65% less than that required for separate systems. With the assistance of solar energy, it became clear that the energy required was 60% less than the hybrid system as well. © The Author(s) 2024.

关键词： Hybrid systems

来源：评论

学校读者我要写书评

暂无评论

Review on the effect of isomorphic replacement on the structure and application performance of typical clay minerals

引用

Progress in Natural science:materials International 2024年第2期34卷 251-262页

作者： Ritong Huang Limei Wu Xiaolong Wang Ning Tang Lili Gao Aiqin Wang Yushen Lu School of Materials Science and Engineering Shenyang Jianzhu University School of Mechanical Engineering Shenyang Jianzhu University Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green Chemistry Lanzhou Institute of Chemical Physics Chinese Academy of Sciences

Clay minerals represent a class of hydrated phyllosilicates making up the fine-grained portions of rocks, sediments, and soils. Due to the advantages of abundant reserves, low prices, and wide applications, the development and utilization of clay minerals have received increasing attention in recent years. Isomorphic replacement is a common phenomenon in clay minerals, which is one of the main causes of changes in mineral chemical composition and physical and chemical properties. This article briefly describes the crystal structure of several clay minerals such as montmorillonite, vermiculite, palygorskite, kaolinite, and halloysite. It summarized the research status of the effect of isomorphic replacement on their structure and application performance. The research results can provide theoretical basis for the structural research and efficient resource utilization of clay minerals.

关键词： Clay minerals Crystal structure Isomorphism Application performance

来源：评论

学校读者我要写书评

暂无评论

Recent research progress in the mechanism and suppression of fusion welding-induced liquation cracking of nickel based superalloys

引用

International Journal of Minerals,Metallurgy and materials 2024年第5期31卷 1072-1088页

作者： Zongli Yi Jiguo Shan Yue Zhao Zhenlin Zhang Aiping Wu Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China College of Engineering China Agricultural UniversityBeijing 100091China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China Key Laboratory for Advanced Materials Processing Technology Ministry of EducationBeijing 100084China School of Material Science and Engineering Southwest Jiaotong UniversityChengdu 610031China

Nickel-based superalloys are extensively used in the crucial hot-section components of industrial gas turbines,aeronautics,and astronautics because of their excellent mechanical properties and corrosion resistance at high *** welding serves as an effective means for joining and repairing these alloys;however,fusion welding-induced liquation cracking has been a challenging *** paper comprehensively reviewed recent liquation cracking,discussing the formation mechanisms,cracking criteria,and *** recent investigations,regulating material composition,changing the preweld heat treatment of the base metal,optimizing the welding process parameters,and applying auxiliary control methods are effective strategies for mitigating *** promote the application of nickel-based superalloys,further research on the combination impact of multiple elements on cracking prevention and specific quantitative criteria for liquation cracking is necessary.

关键词： nickel-based superalloy fusion welding liquation cracking cracking mechanism cracking suppression

来源：评论

学校读者我要写书评

暂无评论

Design and preparation of highly crystalline K-intercalated W@PCN:an efficient material for aniline elimination

引用

Rare Metals 2024年第3期43卷 1337-1342页

作者： Hao-Fei Li Kai-Wen Yu Xiao-Bi Jing Lei Duan Yi-Yang Zhang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225002China School of Mechanical Engineering Yangzhou UniversityYangzhou225127China School of Material Science and Engineering Huazhong University of Science and TechnologyWuhan430071China School of Chemical Engineering and Materials Changzhou Institute of TechnologyChangzhou213032China Department of Basic Courses Army Engineering University of PLANanjing211101China

In this paper,we designed and prepared the polymeric carbon nitride-supported tungsten(W@PCN)*** were employed as the catalysts for photocatalytic oxidation of aniline in *** the process,H_(2)O_(2)was initially generated via the PCN-catalyzed *** by supported tungsten,aniline was oxidized by the in situ generated H_(2)O_(2)to obtain less toxicpoly aniline.

关键词： materials aniline crystalline

来源：评论

学校读者我要写书评

暂无评论

Robust H-infinity Control for the Longitudinal Dynamics of a Fixed Wing Aircraft

Robust H-infinity Control for the Longitudinal Dynamics of a...

引用

AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Rashad, Maha El-Badawy, Ayman Hamza, Abdelaziz Faculty of Engineering Mechanical Engineering Department German International University Cairo Egypt Faculty of Engineering and Material Science Mechatronics Engineering Department German University in Cairo Cairo Egypt

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

In this paper, the design and application of a feedback-linearization-based controller combined with a robust µ-synthesis for trajectory tracking for the longitudinal dynamics of an aircraft is presented. This approach is compared with a full-state feedback controller to validate this control strategy. The proposed approach aims to enhance the robustness and performance of the system in the presence of various uncertainties and disturbances, including unmodeled nonlinear dynamics and wind disturbances. The feedback linearization technique is used to eliminate model non-linearities to enable linear control methodologies to be effectively applied. Subsequently, a µ-synthesis controller is designed to ensure robust performance and stability under structured uncertainties. The simulation results indicate that the proposed controller effectively ensures the aircraft follows the desired position trajectories, despite the presence of wind disturbances and unmodeled nonlinear dynamics, thus, the control system satisfies the requirements. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Feedback linearization

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：