检索结果-内蒙古大学图书馆

Effect of Rare Earth Element Yttrium on Microstructure and Properties of Plasma Arc Welding Joints of Inconel 625 Superalloy

引用

Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal materials and engineering 2025年第5期54卷 1283-1290页

作者： Zhang, Zhongke Ji, Baocheng Chen, Rongyao Liu, Lina School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of Technology Lanzhou730050 China

Plasma welding technique was used to weld the nickel based superalloy Inconel 625 plate (100 mm×50 mm×4 mm) with yttrium (Y) metal powder. The samples were characterized by OM, SEM and mechanical properties test. The results show that the joint formation is optimal when the welding current is 95 A, the welding speed is 110 mm/min, the plasma gas flow is 3 L/min and the content of yttrium element is 0.3wt%. The microstructure of the weld zone is fine equiaxed crystal, and the finer and more uniform grains appear in the heat affected zone after adding yttrium element. A large amount of Laves phase, carbide phase (MC) and yttrium-rich phase (Y-riched) are precipitated in welded joints. With the increase in yttrium content, the tensile strength, yield strength and elongation of the joint increase first and then decrease. When the yttrium content is 0.3wt%, the tensile strength of the sample is the highest of 776.59 MPa, the yield strength is the highest of 595.68 MPa, and the elongation is the highest of 46.60%. The overall property of the sample is higher than that without adding rare earth. Both tensile and impact fractures are ductile fractures. When the yttrium content is 0%, the hardness of weld zone is the highest, and the hardness of weld zone decreases significantly after the addition of yttrium element. © 2025 science Press. All rights reserved.

关键词： Tensile strength

来源：评论

学校读者我要写书评

暂无评论

Biphasic mineralized collagen-based composite scaffold for cranial bone regeneration in developing sheep

引用

Regenerative Biomaterials 2022年第1期9卷 280-293页

作者： Jingchuan Zheng Zhijun Zhao Yongdong Yang Shuo Wang Yonggang Zhao Yang Xiong Shuhui Yang Zhiye Qiu Tianxi Song Chunyang Zhang Xiumei Wang State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Advanced Materials of Ministry of EducationSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Neurosurgery The First Affiliated Hospital of Baotou Medical SchoolBaotou 014010China Dongzhimen Hospital Affiliated Beijing University of Chinese Medicine Beijing 100700China Beijing Allgens Medical Science and Technology Co. Ltd.Beijing 100176China

Appropriate mechanical support and excellent osteogenic capability are two essential prerequisites of customized implants for regenerating large-sized cranial bone *** porous bone scaffolds have been widely proven to promote bone regeneration,their weak mechanical properties limit the clinical applications in ***,we applied two previously developed mineralized collagen-based bone scaffolds(MC),porous MC(pMC)and compact MC(cMC)to construct a biphasic MC composite bone scaffold(bMC)to repair the large-sized cranial bone defect in developing sheep.A supporting frame composed of cMC phase in the shape of tic–tac–toe structure was fabricated first and then embedded in pMC *** two phases had good interfacial bond,attributing to the formation of an interfacial *** in vivo performance of the bMC scaffold was evaluated by using a cranial bone defect model in 1-month-old *** computed tomography imaging,X-ray scanning and histological evaluation showed that the pMC phase in the bMC scaffold,similar to the pMC scaffold,was gradually replaced by the regenerative bone tissues with comprehensively increased bone mineral density and complete connection of bone bridge in the whole *** cMC frame promoted new bone formation beneath the frame without obvious degradation,thus providing appropriate mechanical protection and ensuring the structural integrity of the *** general,the sheep with bMC implantation exhibited the best status of survival,growth and the repair *** biphasic structural design may be a prospective strategy for developing new generation of cranioplasty materials to regenerate cranial bone defect in clinic.

关键词： mineralized collagen cranial bone defect biphasic composite scaffold,developing sheep

来源：评论

学校读者我要写书评

暂无评论

Structural revolution of atomically dispersed Mn sites dictates oxygen reduction performance

引用

Nano Research 2021年第12期14卷 4512-4519页

作者： Zhengkun Yang Xiaolin Wang Mengzhao Zhu Xinyan Leng Wenxing Chen Wenyu Wang Qian Xu Li-Ming Yang Yuen Wu School of Chemistry and Materials Science iChEMHefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei230026China Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Key Laboratory of Material Chemistry for Energy Conversion and StorageMinistry of EducationHubei Key Laboratory of Materials Chemistry and Service FailureHubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China Institutes of Physical Science and Information Technology Key Laboratory of Structure and Functional Regulation of Hybrid Materials(Anhui University)Ministry of EducationAnhui Graphene Engineering LaboratoryAnhui UniversityHefei230601China Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing100081China National Synchrotron Radiation Laboratory(NSRL) Hefei230026China

An efficient preparation and local coordination environment regulation of isolated single-atom sites catalysts(ISASC)for improved activity is still ***,we develop a solid phase thermal diffusion strategy to synthesize Mn ISASC on highly uniform nitrogen-doped carbon nanotubes by employing MnO_(2) nanowires@ZIF-8 core-shell *** high-temperature,the Mn species break free from core-MnO_(2) lattice,which will be trapped by carbon defects derived from shell-ZIF-8 carbonization,and immobilized within carbon ***,the poly-dispersed Mn sites with two nitrogen-coordinated centers can be controllably renovated into four-nitrogen-coordinated Mn sites using NH3 treatment *** experimental and computational investigations indicate that the symmetric coordinated Mn sites manifest outstanding oxygen reduction activity and superior stability in alkaline and acidic *** work not only provides efficient way to regulate the coordination structure of ISASC to improve catalytic performance but also paves the way to reveal its significant promise for commercial application.

关键词： thermal diffusion coordination repairing single-atom manganese oxygen reduction catalysis fuel cells

来源：评论

学校读者我要写书评

暂无评论

Accelerated screening of water-stable MOF structures using the digital reticular chemistry method

引用

Journal of materials Chemistry A 2025年第22期13卷 17087-17101页

作者： Song, Zeyang Lu, Shaopeng Cheng, Shanshan Li, Haijian Gao, Hongyi Liu, Zhimeng Su, Yuqiao Li, Wenqing Ji, Yujing Jin, Xu Wang, Ge Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Research Institute of Petroleum Exploration & Development PetroChina Beijing100083 China National Key Laboratory of Energetic Materials Xi'an Modern Chemistry Research Institute Xi'an710065 China

Metal-organic frameworks (MOFs) are a class of porous materials renowned for their potential applications in areas such as gas separation and catalysis, while their practical utilization is often hampered by structural stability under varying humidity conditions. The emergence of digital reticular chemistry has revolutionized traditional MOF development methodologies, which are typically labor-intensive and costly. This study addresses the urgent need for innovative strategies to overcome these limitations by constructing a comprehensive dataset encompassing over 300 entries that detail the water stability characteristics of MOFs. To quantify material affinity for water, we introduced a computational descriptor, the Henry constant. Utilizing only three descriptors—RACs, SOAP, and the Henry constant—we trained machine learning (ML) models employing two classification strategies. These models exhibited robust predictive performance, achieving macro ROC-AUC values of 0.90 and 0.82 for the two- and three-class models, respectively. The generalizability of these models was further validated with newly collected data, and a detailed analysis of the three-class model yielded valuable chemical insights for the design of water-stable MOFs. Furthermore, the trained model was employed to predict the water stability of 100 MOFs, randomly selected from the CoRE database, and the reliability of the predictions was substantiated through the synthesis and stability testing of one predicted structure. The developed ML model facilitates the rapid screening of MOFs with targeted water stability, thereby streamlining the material selection and validation process and accelerating their application in specific domains. © 2025 The Royal Society of Chemistry.

关键词： Metal analysis

来源：评论

学校读者我要写书评

暂无评论

The Production of Soluble Regenerated Silk Fibroin Powder with High Molecular Weight and Silk Protein-Based materials

SSRN

引用

SSRN 2024年

作者： Shao, Zhengzhong Gu, Kai Tong, Yixuan Mi, Ruixin Leng, Siyan Huang, Hanwen Yao, Jingrong Chen, Xin State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Laboratory of Advanced Materials Fudan University Shanghai200433 China

The aqueous solution of regenerated silk fibroin (RSF) is considered as the raw material to produce various silk protein-based materials, including hydrogel, film, rod and fiber, etc. with significant mechanical properties. However, the aqueous solution of RSF is usually unstable within a few days or even hours in terms of its essential properties, because the conformation of the RSF chain would spontaneously transfer from random coil to β-sheet in water. In this work, we developed a way to harvest the RSF powder through an optimized spray drying method via rapid drying at a relatively low temperature. It was demonstrated that no severe degradation and conformational transition of the RSF chain occurred during powder preparation, and the RSF powder exhibited remarkable solubility in water and long stability at room temperature. Importantly, there are no obvious differences in the mechanical properties of the silk protein-based materials made from the aqueous solution from the spray-dried RSF powder (Sp-RSF) and from fresh RSF solution. Indeed, such amorphous Sp-RSF powder, in which the protein chain was dominated by random coil conformation, not only promised as the raw material for large-scale silk protein-based products in various applications but also provided the basis for fabricating bulk silk protein materials via the untraditional processing of silk fibroin, such as molding with the help of heat and moisture. © 2024, The Authors. All rights reserved.

关键词： Proteins

来源：评论

学校读者我要写书评

暂无评论

Polarity-triggered anti-Kasha system for high-contrast cell imaging and classification

Aggregate

引用

Aggregate 2023年第2期4卷 216-226页

作者： Junyi Gong Peifa Wei Junkai Liu Yuncong Chen Zheng Zhao Weijun Zhao Huilin Xie Chao Ma Jacky W.Y.Lam Kam Sing Wong Ying Li Ben Zhong Tang Shenzhen Institute of Aggregate Science and Technology School of Science and EngineeringThe Chinese University of Hong KongShenzhenChina Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyState Key Laboratory of Molecular NanoscienceDivision of Life Science and Department of Chemical and Biological EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonChina Institutes of Physical Science and Information Technology Anhui UniversityHefeiChina Department of Physics HKUSTKowloonChina Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target and Clinical Pharmacology The NMPA and State Key Laboratory of Respiratory DiseaseInnovation Research Center for AIE Pharmaceutical BiologySchool of Pharmaceutical Sciences and the Fifth Affiliated HospitalGuangzhou Medical UniversityGuangzhouChina Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen UniversityShenzhenChina Center for Aggregation-Induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina AIE Institute Guangzhou Development DistrictHuangpuChina

Kasha’s rule,which states that all exciton emissions occur from the lowest excited state and are independent of excitation energy,makes high-energy excitons difficult to use and severely hinders the widespread applications of organic photoluminescent materials in the real *** decades,scientists have tried to break this rule to unleash the power of high-energy excitons,but only minimal progress has been achieved,with no rational guiding principles provided,and few applications *** far,breaking Kasha’s rule has remained a purely academic *** this paper,we introduce a design principle for a purely organic anti-Kasha system and synthesise a series of compounds based on the design *** predicted,these compounds all display evident S_(2) emissions in dilute *** addition,we introduce a highly accurate(over 90%)convolutional neural network as an assistant for the classification of cells using anti-Kasha luminogens,thereby providing a new application direction for anti-Kasha systems.

关键词： anti-Kasha cell classification excited-state dynamics fluorescence

来源：评论

学校读者我要写书评

暂无评论

Cyclic stability of superelasticity in a Ti-Zr-Hf-Ni-Co-Cu high entropy shape memory alloy

引用

materials Letters 2025年 394卷

作者： Liu, Guijun Huang, Lian Cong, Daoyong State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Department of Mechanical Engineering Hunan Institute of Engineering Xiangtan411101 China

Structural and functional fatigue of shape memory alloys (SMAs) is of vital importance for their practical applications, but the fatigue of high entropy SMAs (HESMAs) has seldom been investigated. Here we developed a Ti31Zr5Hf14Ni32Co4Cu14 HESMA with exceptional fatigue performance. This HESMA exhibits stable superelasticity with a recoverable strain of 3.1 % over 10,000 loading–unloading cycles at 25°C. It also demonstrates excellent cyclic stability of superelasticity during 1,000 loading–unloading cycles at 100°C. Furthermore, a stable elastocaloric effect with adiabatic temperature change of 11.5°C over 10,000 loading–unloading cycles at 25°C was also obtained. The excellent cyclic stability could be attributed to the high yield strength resulting from severe lattice distortion in high entropy alloys and the presence of second phase particles that may reduce the stress hysteresis. This work is instructive for the development of HESMAs with a long fatigue life. © 2025 Elsevier B.V.

关键词： Ternary alloys

来源：评论

学校读者我要写书评

暂无评论

Welcoming Message

Textile Bioengineering and Informatics Symposium Proceedings...

引用

Textile Bioengineering and Informatics Symposium Proceedings, TBIS 2024年 2024-August卷

作者： Zhu, Meifang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials China College of Materials Science and Engineering Donghua University China Innovation Base of Advanced Fabrication Technology of Fiber Materials China

来源：评论

学校读者我要写书评

暂无评论

Development of Ceramic 3D/4D Printing in China

引用

Additive Manufacturing Frontiers 2024年第4期3卷 3-28页

作者： Xinya Lu Guo Liu Jian Lu Department of Materials Science and Engineering City University of Hong KongHong Kong999077China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei230027China CityU-Shenzhen Futian Research Institute Shenzhen518045China Hong Kong Branch of National Precious Metals Material Engineering Research Center City University of Hong KongHong Kong999077China Centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen518057China

China derives its name from its rich legacy of traditional ceramic arts,which has inspired generations of people in China and beyond to improve their ceramic processing *** review categorises the various ceramic additive manufacturing techniques developed in China into dot-by-dot,line-by-line,and area-by-area additive manufacturing techniques,according to their corresponding dimensional printing *** techniques are categorised according to ISO standards,with an overview of representative achievements by Chinese research groups for each *** review also summarises and compares materials,printing parameters,and product properties in those studies,highlighting differences in printing speeds among different printing *** addition,milestones in contemporary ceramic four-dimensional(4D)printing are illustrated in terms of the new material(4D printing elastomer-derived ceramics),new process(4D additive-subtractive manufacturing of ceramics),and new function(4D printing shape memory ceramics).Finally,the prospects for ceramic printing and its applications are discussed.

关键词： Additive manufacturing Ceramic China 4D printing Additive–subtractive manufacturing Shape memory ceramics

来源：评论

学校读者我要写书评

暂无评论

Cu doped VO2 cathode materials for ultra-stable and high-performance aqueous zinc-ion batteries

引用

Journal of Electroanalytical Chemistry 2025年 989卷

作者： Wang, Zihan Chang, Mengwei Geng, Heshun Cui, Peng Song, Pengcheng Hu, Fang You, Junhua Zhu, Kai School of Materials Science and Engineering Shenyang University of Technology Shenyang Key Laboratory of Advanced Energy Materials and Renewable Resources Liaoning Shenyang110870 China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Heilongjiang Harbin150010 China

Vanadium-based materials are considered to be the most promising cathode materials for aqueous zinc-ion batteries. Unfortunately, the existence of electrostatic forces between vanadium-based materials materials and zinc ions, as well as their poor intrinsic electrical conductivity and unstable structure, have further hindered the development of vanadium-based materials. Hence, a lamellar nanoflower-structured Cu0.05VO2 cathode material is prepared by Cu doped VO2 in the tunnel to improve its electrical conductivity and weaken the electrostatic repulsion force between it and zinc ions. The Cu0.05VO2 cathode can deliver a high capacity of up to 416 mAh g−1 at 0.5 A g−1 and maintain a capacity retention rate of 95.4 % after 6000 cycles at 10 A g−1. Experimental and theoretical calculations show that both the electrical conductivity and the zinc ion transport rate are greatly enhanced in Cu0.05VO2. Therefore, the Cu0.05VO2 cathode material shows potential for use in AZIBs. © 2025 Elsevier B.V.

关键词： II-VI semiconductors

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：