检索结果-内蒙古大学图书馆

Ecofriendly Mortar with Paint Sludge Ash

materials 2025年第9期18卷 2080-2080页

作者： Endale, Solomon Asrat Yehualaw, Mitiku Damtie Taffese, Woubishet Zewdu Vo, Duy-Hai Faculty of Civil and Water Resource Engineering Bahir Dar Institute of Technology Bahir Dar University P.O. Box 26 Bahir Dar Ethiopia Department of Civil Architectural and Environmental Engineering Missouri University of Science and Technology RollaMO65401 United States School of Research and Graduate Studies Arcada University of Applied Sciences Jan-Magnus Jansson Aukio 1 Helsinki00560 Finland Department of Materials Science and Engineering Missouri University of Science and Technology RollaMO65401 United States

This research aims to address the environmental and economic challenges associated with conventional concrete by partially replacing cement—the most polluting, expensive, and energy-intensive ingredient—with industrial paint sludge ash (PSA), a highly contaminated industrial waste that is typically landfilled. Mortar mixtures were prepared with PSA replacement levels ranging from 0% to 20% in 5% increments while maintaining a constant water-to-binder ratio of 0.48. This study comprehensively evaluated the fresh, mechanical, durability, and microstructural properties of the PSA-modified mortar to assess its potential as an ecofriendly construction material. Results showed that as PSA content increased, the fresh properties, such as workability/slump flow and setting time, decreased, while the water demand for attaining normal consistency increased. Soundness tests indicated expansion up to 15% PSA replacement, beyond which expansion became more pronounced. Compressive strength improved significantly with PSA replacements of 5% to 15% compared to the control sample, with a slight decline at 15% relative to 5% and 10%. This trend was consistent with bulk density and ultrasonic pulse velocity measurements. Furthermore, the incorporation of PSA enhanced key durability properties, including water absorption, sulfate resistance, and porosity reduction, up to 15% PSA replacement. Microstructural analysis using SEM, XRD, TGA/DTA, and FTIR confirmed that PSA inclusion led to increased mortar densification, with the 10% PSA mix exhibiting thermal stability and minimal mass loss at elevated temperatures. FTIR spectra further indicated improved composition with higher PSA content. Overall, PSA proved to be a viable partial cement replacement, offering enhanced mortar properties without compromising performance. Its use contributes to sustainability by reducing reliance on cement, lowering construction costs, and eliminating the environmental and logistical burdens of paint sludg

关键词： Compressive strength

来源：评论

学校读者我要写书评

暂无评论

Sustainability assessment of carbonaceous nanostructured materials for efficient hydrogen storage

引用

International Journal of Hydrogen Energy 2025年 135卷 477-498页

作者： Nemati, Behrouz Kamali, Mohammadreza Aminabhavi, Tejraj M. Dewil, Raf Costa, M. Elisabete V. Capela, Isabel Department of Environment and Planning Center for Environmental and Marine Studies CESAM University of Aveiro Aveiro3810-193 Portugal Department of Materials and Ceramics Engineering Aveiro Institute of Materials CICECO University of Aveiro Aveiro3810-193 Portugal KU Leuven Department of Chemical Engineering Process and Environmental Technology Lab J. De Nayerlaan 5 Sint-Katelijne-Waver2860 Belgium Center for Energy and Environment School of Advanced Sciences KLE Technological University Hubballi580 031 India Chandigarh University Punjab Mohali140 413 India Korea University Seoul02841 Korea Republic of University of Oxford Department of Engineering Science Parks Road OxfordOX1 3PJ United Kingdom

Increasing demands for energy driven by economic growth and development and challenges have prompted countries to shift towards renewable energy production. Hydrogen (H2) is a promising energy carrier to address the increasing need for clean energy sources. Hence, efforts are concentrated on developing sustainable methods for efficient production and safe H2 storage. Carbonaceous nanomaterials (CNMs) have emerged as promising candidates for high-performance H2 storage applications due to their unique properties, including high specific surface area. Despite the inherent advantages of CNMs for H2 storage, challenges remain in their cost-effective synthesis and hydrogen adsorption capacity, especially under ambient conditions. As research advances, a sustainability framework integrating technical, environmental, health, safety, economic, and social aspects is crucial to provide a roadmap to overcome existing barriers against the commercialization of CNMs for hydrogen storage applications. The discussions provided in the present review highlight that adopting strategies including nitrogen-doping, metal (e.g., Pd, Pt, Ni, Ti) incorporation, and the design of CNMs nanocomposites can shape the road of sustainable hydrogen storage. © 2025

关键词： Nanocomposites

来源：评论

学校读者我要写书评

暂无评论

High-temperature friction and wear properties of valve-seat pair with different ni contents 5

High-temperature friction and wear properties of valve-seat ...

引用

2024 5th International Conference on Advanced materials and Intelligent Manufacturing, ICAMIM 2024

作者： Zeng, Xiaoxiao Luo, Changzeng Li, Zhijie Wang, Huajie Qu, Shengguan Duan, Chenfeng Weichai Power Co. Ltd. Weifang261061 China State Key Laboratory of Engine and Powertrain System Weifang261061 China National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of Technology Guangzhou510640 China School of Automotive Studies Tongji University Shanghai201804 China College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing211106 China

A detailed study is conducted on the high-temperature wear performance of valve seat rings with different Ni contents. The wear resistance of two types of contact pairs is studied through methods such as three-dimensional profile, wear amount, and wear morphology. Research has shown that the friction coefficients of both contact pairs gradually decrease with increasing temperature, while the wear amount of both contact pairs shows a trend of first decreasing and then increasing, and both have the lowest wear amount under 500℃ conditions. The wear performance of Inconel 751 material contact pairs is better at room temperature, but Pyromet 31 material contact pairs have stronger stability under high-temperature conditions. Therefore, Pyromet 31 material has better wear and wear resistance in high-temperature environments. Temperature can affect the hardness of materials, resulting in varying degrees of material softening, and also affect the formation rate of oxide films on wear surfaces. The rapid formation of oxide films is an important reason for the greater wear resistance of Pyromet 31 materials. 2025 Published under licence by IOP Publishing Ltd.

关键词： Oxide films

来源：评论

学校读者我要写书评

暂无评论

Tribological Behaviors and Statistical Experimental Design of Sintered and Age-Hardened Aluminum–Copper Based Composites

引用

Lubricants 2025年第4期13卷 172-172页

作者： Popescu, Ileana Nicoleta Alhalaili, Badriyah Anghelina, Florina Violeta Nicolicescu, Claudiu Vidu, Ruxandra Faculty of Materials Engineering and Mechanics Valahia University of Targoviste Targoviste130004 Romania Valahia University of Targoviste Targoviste130004 Romania American Romanian Academy of Arts and Sciences Citrus HeightsCA95611 United States Nanotechnology and Advanced Materials Program Kuwait Institute for Scientific Research P.O. Box 24885 Safat 13109 Kuwait Department of Engineering and Management of the Technological Systems Faculty of Mechanics University of Craiova Drobeta-Turnu Severin220037 Romania Faculty of Materials Science and Engineering National University of Science and Technology POLITEHNICA Bucharest Bucharest060042 Romania

This paper reports on the influence of various processing parameters and different SiCp proportions on the outcome of mechanical, tribological, microstructural, and microcompositional investigations of Al-Cu based composites used as potential brake friction materials for eco-friendly vehicle parts. The composites were obtained by powder metallurgy, and then the sintered composite was treated at 515 ± 5 °C/6 h, quenched in water, and artificially aged at different temperatures and times. The microstructural and microcompositional investigations of the composites were made using an environmental scanning electron microscopy (ESEM), energy-dispersive X-ray spectroscopy (EDS). After analyzing the microstructures in correlation with the results of the hardness tests, the optimal proportion of SiCp and optimal heat treatment parameters were determined. The composite samples with the best properties were chosen for tribological investigation. The friction and wear tests of samples were made under dry sliding conditions using a "pin on disc" machine, at a contact pressure of 0.35 to 1.15 MPa, 2 to 4.5 m/s relative speed, and the prediction of tribological behavior was made using a linear factorial design approach. © 2025 by the authors.

关键词： Sintering

来源：评论

学校读者我要写书评

暂无评论

Increased corrosion resistance of steel substrates coated with epoxy resin/ZnO/Fe 2 O 3 obtained from electric arc furnace dust recovery

引用

Journal of materials Research and Technology 2025年 36卷 9462-9472页

作者： Mário Andrean Macedo Castro Tanara Caroline Nunes Nicácio Antonio Carlos do Nascimento Santos José Eudes Lima Santos Luis David Loor-Urgilés Antonio Eduardo Martinelli Fabiana Villela da Motta Mauricio Bomio LSQM–Laboratory of Chemical Synthesis of Materials Department of Materials Engineering Federal University of Rio Grande do Norte – UFRN P.O. Box 1524 Natal RN Brazil Institute of Chemistry Federal University of Rio Grande do Norte 59078-970 Natal RN Brazil Postgraduate Program in Materials Science and Engineering Federal University of Rio Grande do Norte 59078-900 Natal RN Brazil

The sustainable management of metal-rich industrial wastes, such as electric arc furnace dust (EAFD), remains a critical challenge for the steel industry. Although previous studies have investigated metal recovery routes and their application in functional materials, few have explored the reuse of these wastes as active components in anticorrosive coatings. This work proposes an innovative approach for valorizing EAFD, recovering iron (Fe 2 O 3 ) and zinc (ZnO) oxides through acid leaching, basic precipitation, and heat treatment. After recovery, mixed ZnO/Fe 2 O 3 oxides were prepared in different proportions and incorporated as nanofillers in an epoxy matrix, creating a hybrid coating aimed at protecting carbon steel against corrosion. The obtained materials were characterized by XRF, XRD, FTIR, SEM, and BET analysis, while the mechanical and anticorrosive properties were evaluated by Vickers hardness tests, Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy. After 240 h of immersion in saline solution and 360 h of Salt-spray test, the coating with the highest Fe 2 O 3 content demonstrated superior performance, reducing the corrosion rate by up to 100 times and increasing the load transfer resistance by up to 80 times. The contribution of this study lies in both the proposal of a new cycle for reusing steel waste and in demonstrating a viable route for developing high-performance anticorrosive coatings with potential for industrial application in sectors such as oil and gas. The combination of waste recovery and functional improvement of the material positions this study as a technologically and environmentally relevant solution.

关键词： EAFD ZnO Fe 2 O 3 Epoxy resin Anti-corrosive coatings

来源：评论

学校读者我要写书评

暂无评论

Sn-Mediated Local Atomic Ordering Enhances Reversible Anionic Redox Activity in Cation-Disordered Li1.3Mn0.4Nb0.3O2 Cathodes

引用

Advanced Energy materials 2025年第0期

作者： Sun, Gang Nie, Dan Zhu, Qingjun Gao, Lijun Chang, Yi-Hung Liu, Han Yang, Jiayi Ren, Yang Shao, Yu-Cheng Ishii, Hirofumi Sui, Xulei Wang, PanPan Wang, Hsiao-Tsu Wang, Zhenbo Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advance Technology of Ceramics Guangdong Research Center for Interfacial Engineering of Functional Materials Guangdong Provincial Key Laboratory of New Energy Materials Service Safety College of Materials Science and Engineering Shenzhen University Shenzhen518071 China Bachelor's Program in Advanced Materials Science Tamkang University No.151 Yingzhuan Rd. Tamsui Dist. New Taipei25137 Taiwan Department of Physics City University of Hong Kong 999077 Hong Kong National Synchrotron Radiation Research Center 101 Hsin-Ann Road Hsinchu Science Park Hsinchu300092 Taiwan State Key Laboratory of Space Power-Sources MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage MOE Engineering Research Center for Electrochemical Energy Storage and Carbon Neutrality in Cold Regions School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China

Recent advances in lithium-ion batteries have revealed the potential of Li-excess cation-disordered rock salt (DRX) cathodes, which expand the design space for cathode materials. The evidence of facile lattice substitution further provides a key strategy for activating redox reaction centers and enhancing the cycling performance of such materials. Here, the study explores how Sn-mediated local atomic ordering enhances reversible anionic redox activity in Li1.3Mn0.4Nb0.3O2 through the use of aberration-corrected scanning transmission electron microscopy, ex/in situ X-ray techniques, and theoretical calculation. The results demonstrate that Sn incorporation optimizes the local atomic structure, fostering the formation of rapid Li+ diffusion "elevator" pathways and short-range ordered structures, thereby enhancing the Li+ transport network. Additionally, quantitative analysis of the redox pathways and degree of participation for Mn and O during charge–discharge cycles reveals that the Sn-mediated electrode exhibits enhanced anionic O redox activity at high charging voltages, maintaining elevated activity throughout subsequent cycling. This sustained performance not only indicates increased redox capabilities but also suggests improved structural stability. By elucidating the complex interplay between composition, local structure, and performance, this study advances the understanding of DRX materials and underscores the potential of strategic elemental substitution for optimizing disordered cathode materials in next-generation energy storage systems. © 2025 Wiley-VCH GmbH.

关键词： Redox reactions

来源：评论

学校读者我要写书评

暂无评论

Searching for quantum nonthermodynamic phenomena

引用

Physical Review E 2025年第5期111卷 054108-054108页

作者： Yu Qiao Program of Materials Science and Engineering University of California–San Diego La Jolla California 92093 USA and Department of Structural Engineering University of California–San Diego La Jolla California 92093-0085 USA

Recent research on the fundamentals of statistical mechanics has led to an interesting discovery. With locally nonchaotic barriers, as Boltzmann's H theorem is inapplicable, there exist nontrivial nonthermodynamic systems that can produce useful work by absorbing heat from a single thermal reservoir without any other effect, thereby breaking the boundaries of the second law of thermodynamics. The previous analyses used classical mechanical models. In the current investigation, the study is extended to quantum mechanics. First, we reiterate that the Fermi-Dirac distribution and the Bose-Einstein distribution are compatible with the generalized Maxwell's relations, which demonstrates the general robustness of the framework of quantum statistical mechanics. Next, we analyze a set of simple-step scattering problems. When the system is in contact with a thermal reservoir, a bound state inherently follows the second law of thermodynamics, while a scattering state may not. The root cause is associated with the nonlocal nature of the wave function. It implies that the nonthermodynamic phenomena favor unquantized energy and localized wave packets, exhibiting a tendency to occur in “semiclassical” setups.

关键词： Statistical mechanics

来源：评论

学校读者我要写书评

暂无评论

On the microstructural, mechanical, damping, wear properties of magnesium alloy AZ91-3 vol. % SiCP-3 vol. % fly ash hybrid composite and property correlation thereof

引用

Journal of Magnesium and Alloys 2025年

作者： Gollapalli, Prince Pant, Mridul Chandra, A.R. Anil Surappa, M.K. Department of Materials Engineering Indian Institute of Science Karnataka Bangalore560012 India Department of Polymer & Process Engineering Indian Institute of Technology Roorkee Saharanpur Campus Saharanpur247001 India Department of Mechanical Engineering B.M.S. College of Engineering Karnataka Bangalore560019 India INSA Senior Scientist and Adjunct Professor National Institute of Advanced Studies Karnataka Bangalore560012 India

A combination of hard (SiCP) and soft (fly ash) particulate reinforcements could be a strategy to enhance combination of multiple properties of Magnesium and its alloys which otherwise suffer from low stiffness, low wear resistance, and many other critical properties. However, at present a comprehensive and robust map correlating different properties in particle-reinforced composites is much lacking. In this work, an industrial grade AZ91 magnesium alloy reinforced with hard SiC and soft fly ash particles (with 3 vol. % each), has been prepared using stir casting followed by hot extrusion at 325 ∘C with a ratio of 21.5. Microstructure of the hybrid composite was characterized using optical and scanning electron microscopes. The composite exhibited a reduction in average grain size from 13.6 to 7.1 µm, concomitantly an increase in Vickers hardness from 73 to 111 HV. The tension-compression yield asymmetry ratios of the unreinforced alloy and hybrid composite were 1.165 and 0.976, respectively indicating higher yield strength for the composite under compressive load. The composite exhibited 76% improvement in damping capacity under time sweep mode, and 28% improvement at 423 K under temperature sweep mode. The tribological characteristics of the composite under dry sliding conditions at sliding speeds and loads in the range of 0.5 to 1.5 m s-1 and 10 to 30 N, respectively showed higher wear resistance than the unreinforced alloy. The composite showed 23% improvement in sliding wear resistance at a load of 20 N and a speed of 1 m s-1. Finally, efforts have been made to understand the influence of one property on the other by developing statistical property correlation maps from the properties obtained in this study and from the literature. These maps are expected to help in the design of hybrid Metal Matrix Composites for a variety of targeted applications in different sectors. © 2025

关键词： Magnesium alloys

来源：评论

学校读者我要写书评

暂无评论

Optimized Alkaline Synthesis of Hydrotalcite-like CO2 Adsorbents from Blast Furnace Slag and the Influence of Interlayered Silicon on Structure and Adsorption Performance

SSRN

引用

SSRN 2025年

作者： Hua, Han Chen, Hao Su, Yiping Yan, Feng Shen, Xuehua Quan, Zewei Zhang, Zuotai School of Environmental Science and Engineering Key Laboratory of Municipal Solid Waste Recycling Technology and Management of Shenzhen City Southern University of Science and Technology Shenzhen518055 China College of Materials Science and Engineering Xi’an University of Architecture and Technology Xi’an710055 China Department of Chemistry Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen518055 China Guizhou Green Industry Technology Institute Guiyang550014 China

Synthesizing hydrotalcite-like (HT) CO2 adsorbents from blast furnace slag (BFS) is regarded as a promising strategy for valorizing industrial waste while mitigating CO2 emissions in steel industry. However, conventional methods via acid extraction face challenges due to their high reagent consumption and energy-intensive processes. This study proposes an economical alkaline hydrothermal synthesis method for direct conversion of wet-milled BFS slurry into HT-like adsorbents. Synthesized BFS-HT achieves a total CO2 adsorption capacity of 0.27 mmol CO2/g BFS-LDO after calcination at 400 ℃ and subsequent CO2 capture at 200 ℃, representing 68.8% increase compared to unmilled group. HT phases synthesized in Si-rich solutions exhibit a consistent crystalline structure with chemical-sourced layered double hydroxides (syn-LDH). A hydrothermal post-treatment in deionized water partially removes interlayer Si, further increasing CO2 uptake to 0.30 mmol CO2/g BFS-LDO27Al nuclear magnetic resonance (NMR) analysis identifies Al coordination changes during calcination of HT under the impact of interlayer Si by forming Al-O-Si bond. Density functional theory (DFT) modeling reveals the strong interfacial interactions between defective CaO surfaces and silica nanoparticles, potentially inhibiting subsequent carbonation or rehydration reactions. Overall, alkaline-synthesized BFS-HT achieves 24% of the CO2 sorption capacity of syn-LDH, with much lower consumption of acid/alkaline reagents and shorter hydrothermal treatment times compared to conventional acid methods. These results underscore its promising potential for carbon neutralization in the steel industry. © 2025, The Authors. All rights reserved.

关键词： Blast furnaces

来源：评论

学校读者我要写书评

暂无评论

Bandgap of Epitaxial Single-Crystal BiFe1−xMnxO3 Films Grown Directly on SrTiO3/Si(001)

引用

materials 2025年第9期18卷 2022-2022页

作者： Cantrell, Samuel R. Miracle, John T. Cottier, Ryan J. Lindsey, Skyler Theodoropoulou, Nikoleta Materials Science Engineering and Commercialization Program Texas State University San MarcosTX78666 United States Department of Physics Texas State University San MarcosTX78666 United States

We report the growth and optical characterization of single-crystal BiFe1−xMnxO3 thin films directly on SrTiO3/Si(001) substrates using molecular beam epitaxy. X-ray diffraction confirmed epitaxial growth, film crystallinity, and sharp interface quality. Scanning electron microscopy and energy dispersive X-ray spectroscopy verified uniform film morphology and successful Mn incorporation. Spectroscopic ellipsometry revealed a systematic bandgap reduction with increasing Mn concentration, from 2.7 eV in BiFeO3 to 2.58 eV in BiFe0.74Mn0.26O3, consistent with previous reports on Mn-doped BiFeO3. These findings highlight the potential of BiFe1₋xMnxO3 films for bandgap engineering, advancing their integration into silicon-compatible multifunctional optoelectronic and photovoltaic applications. © 2025 by the authors.

关键词： Molecular beam epitaxy

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：