检索结果-内蒙古大学图书馆

Effects of Phosphorus Additions on Microwave Sintering Properties of Uitrafine WC-10Co Cemented Carbides

Journal of Wuhan University of technology(materials Science) 2007年第4期22卷 725-727页

作者：全峰周建 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology State Key Lab of Advanced Technology for Materials Synthesis and Processing Wohan University of Technology

Using the microwave sintering technology, the effects of phosphorus （P） additions on the microstructure and properties of the ultrafine WC-10Co alloys were investigated. The experimental results show that with only 0.3wt% P additions, full density WC-10Co cermets were obtained at temperature of 1250℃, which is 70 ℃ lower than that of the undoped counterparts. Lower sintering temperature can result in finer WC grain growth; therefore, the P-doped WC-10Co alloys exhibited higher hardness than the undoped ones. But at the same time, P doping could lead to sacrifice of fracture toughness ofWC-10Co cemented carbides.

关键词： microwave sintering cemented carbides ultrafine hardmetals phosphorus grain growth inhibitor

来源：评论

学校读者我要写书评

暂无评论

Construction of Cells-Membrane-Cells Living Complexes for Cartilage Repair by Enhancing the Structural Stability of Fibrous Membranes

引用

advanced Healthcare materials 2025年 e2403656页

作者： Hu, Yanru Meng, Lihui Li, Wenchao Zhou, Zilin Cui, Shuojie Wang, Meng Chen, Zebin Wu, Qingzhi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Center of Hepato-Pancreato-Biliary Surgery The First Affiliated Hospital Sun Yat-sen University Guangzhou510080 China

3D cartilage tissue engineering scaffolds with stable structures are crucial for promoting cartilage tissue growth and repair. However, limited research attention is given to the effects of 3D cells-membrane-cells sandwich-like living complexes with enhanced structural stability for cartilage repair. In this study, silk fibroin/graphene oxide@kartogenin (SF/GO@KGN) fibrous membranes with improved structural stability are developed through the regulation of the crystallinity, and living complexes are constructed for cartilage repair using rat bone marrow stromal cells (rBMSCs) and the SF/GO@KGN fibrous membranes. Results show that the physicochemical properties of the SF/GO@KGN fibrous membranes, including morphology, tensile strength, swelling ratio, degradation, and KGN release rate are greatly influenced by the crystallinity of the fibrous membranes. The enhanced structural stability of the fibrous membranes promotes the adhesion, proliferation, and chondrogenic differentiation of rBMSCs on the surface of the fibrous membranes, as well as the deposition of the cartilage's extracellular matrix (ECM). Animal experiments demonstrate that sandwich-like cells-membrane-cells living complexes with high structural stability significantly promote early cartilage formation and ECM deposition. This study not only provides a facile and effective strategy for cartilage regeneration and repair but also provides new insights for designing and preparing other tissue engineering scaffolds. © 2025 Wiley-VCH GmbH.

关键词： Fiber bonding

来源：评论

学校读者我要写书评

暂无评论

Side-chain sterically induced directional units construct stable and continuous ion transport channels for anion exchange membranes

引用

Journal of Membrane Science 2025年 729卷

作者： Zhang, Zhe Zhao, Shengqiu Liao, Yucong Li, Yao Liu, Bingxuan Xiao, Zhengrui You, Zeqi Tian, Tian Zhang, Lan Chan, Siew Hwa Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu Laboratory Foshan528200 China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan430070 China School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore 639798 Singapore

Improving the hydroxide conductivity and dimensional stability of anion exchange membranes (AEMs), while retaining their high alkaline stability, is essential for AEM water electrolysis (AEMWE). Herein, a novel design strategy is proposed for perfluorinated ionomer by introducing sterically induced directional units (SIDUs) at the termini of pendant side chains to achieve superior performance in both conductivity and stability. The design is centered on introducing an appropriate amount of rigid bulk benzyl groups based on fluorinated ionomer segments to driven the directional aggregation of cationic groups, thus enabling the construction of continuous and stable ion transport channels. The resulting Perfluorinated-tribenzyls AEM (PFTQ), by forming continuous and stable ionic channels that significantly enhance OH− and H2O mobility, exhibit an over 46 % and 65 % increase in self-diffusion coefficient compared to Perfluorinated-propyl AEM (PFPQ), achieving an exceptional conductivity of 167 mS cm−1 at 80 °C with a swelling ratio as low as 19 %. Moreover, the robust C–F bond backbone, coupled with the protective effects of SIDUs through electron-donating and steric hindrance on the cationic groups, allows the PFTQ with negligible degradation at 80 °C in 6 M KOH over 400 h. Based on this rational design, we achieved a high alkaline water electrolysis performance of 3.6 A cm−2 at 2.0 V and demonstrated durability of over 500 h at 1 A cm−2 at 80 °C. This study demonstrates that the AEM design strategy based on the introduction of SIDUs has significant potential in achieving excellent energy efficiency and extended stability for electrolyzers. © 2025 Elsevier B.V.

关键词： Potassium hydroxide

来源：评论

学校读者我要写书评

暂无评论

Enhanced oxygen evolution reaction activity of iridium oxide supported on tantalum-doped tin oxide for acidic water electrolysis

引用

International Journal of Electrochemical Science 2025年第7期20卷

作者： Tian, Juanjuan Li, Shang Zhu, Zuobiao Tan, Jinting Pan, Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122# Wuhan 430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen China Hubei Key Laboratory of Fuel Cells Wuhan University of Technology Wuhan 430070 China

In the research process of proton exchange membrane electrolysis, Ir-based catalysts exhibit sluggish dynamics of reaction and the poor durability in strongly acidic medium, as well as the high cost greatly limit their commercialization. In this paper, in order to decrease the Ir amount and improve precious metal utilization, Ta-doped tin oxide (SnO₂) was prepared by sol-gel method in this paper as a support and loaded with iridium dioxide (IrO₂). The results indicate that the Ta doping increased conductivity of SnO₂ by two orders of magnitude and inhibited particle size growth. The introduction of 2Ta-SnO₂ supports improved the electric charge transfer dynamics during the catalytic reaction process, and the mass activity of the 40 wt% IrO₂/2Ta-SnO₂ catalyst reached 835.39 A g⁻¹ IrO₂, which was 3.6 times higher than that of commercial IrO₂. The overpotential of the 40 wt% IrO₂/2Ta-SnO₂ catalyst was 264 mV at a current density of 10 mA cm⁻², which is due to the prominent dispersion effect of the support as well as the interaction of the support surface with the active substance. Its stability is better than that of commercial IrO₂ in a stability test over 20,000 s. Therefore, Ta-doped SnO₂ supported IrO₂ catalysts have a promising application by reducing the cost of precious metal catalysts and enhancing the electrocatalytic properties of OER catalysts. © 2025 The Authors

关键词： Catalyst support OER catalyst Proton exchange membrane electrolysis Ta-doped SnO2

来源：评论

学校读者我要写书评

暂无评论

Fuel Cell Performance Degradation Prediction Method Based on Hybrid Probabilistic Data-driven Model

引用

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering 2025年第10期45卷 3892-3901页

作者： Guo, Bingxin Xie, Changjun Zhu, Wenchao Yang, Yang Du, Banghua Wuhan University of Technology Hubei Province Wuhan430000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Province Wuhan430000 China

Accurately predicting the degradation characteristics of fuel cells can provide a solid basis for control and diagnosis decisions. However, mainstream data-driven methods often do not take into account uncertainty factors such as measurement errors caused by experimental conditions and the model's dependence on the data during the modeling phase. Therefore, only a single point estimate can be provided, resulting in a lack of sufficient credibility in the performance degradation results. This paper proposes a mixed-probability data-driven model (MPDD) that combines the characteristics of multiple data-driven models using Bayesian theory, which could quantify the uncertainty of the model's dependence on the data and provide prediction results for fuel cell performance degradation trends in both point estimates and interval estimates. Based on the full operating condition data in fuel cell dynamic load cycle (FC-DLC), the point estimate results of the MPDD model outperform those of a single data-driven model. Furthermore, based on the steady-state data in FC-DLC, the MPDD model achieves up to a 33% improvement in the concentration rate of interval estimates compared to Gaussian process regression (GPR). The prediction results indicate that this forecasting method possesses excellent uncertainty quantification capabilities and could provide more practical decision recommendations for the operation of electrohydrogen coupling devices. ©2025 *** ***.

关键词： Gaussian distribution

来源：评论

学校读者我要写书评

暂无评论

Optimal design approach of interpenetrating pre-stressed metal-ceramic composites based on deep learning neural network

引用

Composite Structures 2025年 368卷

作者： Liu, Kun Lai, Xin Liu, Lisheng Zhang, Jinyong Liu, Yifei Hubei Longzhong Laboratory Wuhan University of Technology Demonstration Zone XiangYang 537134 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China University of Rochester Rochester 14527 NY United States

In this work, we proposed a new pre-stressed metal-ceramic interpenetrating structure to improve the apparent tensile strength of ceramic. In addition, an optimization design framework was constructed by integrating machine learning and gradient descent optimization algorithm for the optimization design of ceramic interpenetrating composites. The optimized metal-ceramic interpenetrating structure can achieve a balance of the stress state of the ceramic phase between intensity and distribution by ingeniously control the confinement and topology of the metal phase. More specifically, the surrogate model we constructed through deep neural network (DNN) can efficiently predict the relationship between the structure and its stress state. The final result obtained can achieve excellent pre-stress effect while making the structure lightweight. © 2025 Elsevier Ltd

关键词： Deep neural network Interpenetrating structure Optimal design Pre-stressed ceramic

来源：评论

学校读者我要写书评

暂无评论

Preparation of TEMPO-partially oxidized sodium alginate/SF scaffolds with degradation compatibility for skin defect repair

引用

Carbohydrate Polymers 2025年 357卷 123437页

作者： Zhao, Xinxin Wang, Wenyuan Cheng, Bo Li, Binbin Qiu, Tong Yan, Lesan Wang, Xinyu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen Valley Foshan528200 China Sanya Science and Education Innovation Park Wuhan University of Technology Sanya572000 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan430070 China Department of Stomatology Zhongnan Hospital of Wuhan University Wuhan430060 China

This study aimed to curtail the secondary damage caused by traditional dressings by cross-linking TEMPO-mediated oxidized sodium alginate (TOSA) with silk fibroin (SF) through the EDC system and preparing the scaffolds through freeze-drying and anhydrous ethanol immersion. The good adsorption, mechanical properties, high porosity, and good in vitro and in vivo biocompatibility of the scaffold can improve the healing efficiency of the wound. Additionally, sodium alginate was oxidized by the TEMPO system to lower its molecular weight and hence increase the degradation rate of the scaffold. Consequently, the scaffold demonstrated a rapid degradation rate (42.26 % degradation in 7 days) in the in vitro enzyme solution. The scaffold will not induce secondary damage to the wound and does not require removal. Furthermore, the oxidation degree of sodium alginate was regulated by the TEMPO system, supporting the preparation of degradation-adapted skin tissue engineering scaffolds. © 2025 Elsevier Ltd

关键词： Silk

来源：评论

学校读者我要写书评

暂无评论

Ionic Liquid-Grafted Mxene Composite Polymer Electrolytes for High-Performance Solid-state Batteries

SSRN

引用

SSRN 2025年

作者： Li, Yu Qian, Zhi Qiu, Zhao-Dong Wang, Rui-Qing Wei, Mei-Tong Fei, An-Min Hu, Zhi-Yi Mohamed, Hemdan S.H. Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Wuhan430070 China Physics Department Faculty of Science Fayoum University El Gomhoria Street Fayoum63514 Egypt University of Namur NamurB-5000 Belgium

All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li+ transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10-4 S cm-1) and Li+ transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO4|MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g-1 over 120 cycles with an impressive 95.3% capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs. © 2025, The Authors. All rights reserved.

关键词： Solid-state Batteries

来源：评论

学校读者我要写书评

暂无评论

Ultrafast synthesis of Nanoscale Metal Borides for Efficient Hydrogen Evolution

引用

Angewandte Chemie - International Edition 2025年第14期64卷 e202425257页

作者： Liu, Tingting Chen, Chen Pu, Zonghua Huang, Qiufeng Jiang, Jiadong Han, Min Chen, Wei Yu, Guangtao Sun, Yuzhi Huang, Shengyun Chen, Qingjun Al-Enizi, Abdullah M. Nafady, Ayman Mu, Xueqin Mu, Shichun Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fujian Fuzhou350117 China Fujian Normal University Fujian Fuzhou350117 China Ganjiang Innovation Academy Key Laboratory of Rare Earths Chinese Academy of Sciences Ganzhou341000 China Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Nanoscale metal borides, with exceptional physicochemical properties, have been attracted widespread attention. However, traditional synthesis methods of metal borides often lead to surface coking and large particle sizes. Herein, we have employed a flash Joule heating (FJH) technique to enable the ultrafast synthesis of metal boride nanomaterials. The synthesized materials encompass a wide range of diverse categories, including alkaline-earth metal borides (CaB6), transition metal borides (TiB2, VB2, CrB2, MoB, MoB2, MnB2, MnB4, FeB, CoB, NiB), noble-metal borides (RuB2, RuB1.1), and rare-earth metal borides (lab., CeB6). As an example, the RuB2 demonstrates highly desirable electrocatalytic performance for all-pH hydrogen evolution reaction (HER). Especially, under the acidic condition, it exhibits an overpotential as low as 15 mV at a current density of 10 mA cm−2, with a nearly 100 % faradic efficiency. Additionally, in situ Raman spectra confirm that both Ru and B sites serve as active sites for the HER. Moreover, the stability of RuB2 can be further enhanced by optimizing the microenvironments of the anolyte composition (H+, K+). More importantly, the experimental and density functional theory (DFT) calculations reveal that the co-existence of H+ and K+ localized around the RuB2 plays a crucial role in further enhancing the stability. © 2025 Wiley-VCH GmbH.

关键词： Joule heating

来源：评论

学校读者我要写书评

暂无评论

Facile synthesis of Uniform Hollow Hematite Sub-micro Spheres with Controllab.e Shell Thickness

引用

Journal of Wuhan University of technology(materials Science) 2010年第1期25卷 32-38页

作者：闫共芹官建国 State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

A simple method was developed to prepare the uniform hematite hollow submicro-spheres with controllab.e structure and different diameter based on monodisperse poly（styrene-co-acrylic acid） [P（St-co-AA）] particles. The structure and formation mechanism of the hollow spheres were investigated in detail. The control mechanism of shell thickness was also discussed. The results indicated that the shell thickness and coarseness of the synthesized core-shell hematite hollow spheres could be tuned simply by the surface carboxyl content of the P（St-co-AA） particles. This method provided a new approach for the structure control in the preparation of hollow spheres. A Brunauer-Emmett-Teller （BET） test shows that the prepared hollow spheres have large surface areas which were decreased along with the increase of the diameter. The magnetic properties of the as-obtained hematite hollow spheres were investigated. The result showed that the coercivity and saturated magnetization were increased along with the increase of the shell thickness, and the remanent magnetization was increased along with the decrease of the diameter.

关键词： hollow spheres hematite shell thickness BET special surface area magnetization properties

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：