检索结果-内蒙古大学图书馆

Extreme Materials 2025年第1期1卷 38-66页

作者： Yuxuan Liu Hui Wang Jianchao Hao Yuan Cheng Shun Dong Ping Hu Wenbo Han Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of Technology Harbin 150001 China

With the advancement of hypersonic vehicles, extreme high temperature environments have imposed increasingly stringent requirements on the performance of thermal protection systems. Consequently, the development of high-performance thermal protection materials capable of withstanding extreme conditions has become a primary focus of current research. Ultra-high temperature ceramics (UHTCs) and their composites, known for their excellent oxidation resistance and ablation performance, are regarded as highly promising non-ablative thermal protection materials. This paper provides a systematic review of recent research progress on UHTC composites in several key areas, including innovations and optimizations in fabrication processes, exploration of toughening strategies and mechanisms, in-depth studies on oxidation and ablation resistance mechanisms, and the development and potential applications of high-entropy ceramics. Furthermore, the paper discusses the practical application prospects of UHTCs and their composites in extreme environments, analyzes the current technical challenges, and proposes future research directions and priorities.

关键词： Extreme environments materials Ultra-high temperature ceramics (UHTCs) Toughening and strengthening Oxidation and ablation Hypersonic vehicles

来源：评论

学校读者我要写书评

暂无评论

Rubik’s cube as in-situ programmable matter and a reconfigurable mechanical metamaterial

引用

science China(Technological sciences) 2024年第10期67卷 3221-3234页

作者： ZHU ShaoWei CHEN Huan YANG XiaoQiang TAN Li JIN Shuai CHEN LiMing LIU Tao TAN XiaoJun WANG LianChao WANG Bing MUAMER Kadic State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing 400030China College of Aerospace Engineering Chongqing UniversityChongqing 400030China School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710129China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Institut FEMTO-ST CNRS UMR 6174University BourgogneFranche-ComtBesan¸con 25000France

As part of the 4th industrial revolution,programmable mechanical metamaterials exhibit great application potential in flexible robotics,vibration control,and impact ***,maintaining a programmed state without sustaining the external stimulus is often challenging and leads to additional energy *** by Rubik’s cube,we design and study an in-situ programmable and distribution-reconfigurable mechanical metamaterial(IPDR-MM).A matrix model is developed to model IPDR-MMs and describe their morphological *** on this model,the reinforcement learning method is employed to find the pathways for morphological *** find that IPDR-MMs have controllable stiffness across several orders of magnitude and a wide range of adjustable anisotropies through morphology ***,because of the independence of the directions of morphology transformation and bearing,IPDR-MMs exhibit good stability in bearing and can readily achieve high *** Rubik’s cube-inspired design concept is also instructive for other deformable structures and metamaterials,and the current version of the proposal should be sufficiently illustrative to attract and broaden interdisciplinary interests.

关键词： mechanical metamaterials in-situ programmable distribution-reconfigurable Rubik’s cube controllable stiffness and anisotropy

来源：评论

学校读者我要写书评

暂无评论

A reconfigurable dynamic Bayesian network for digital twin modeling of structures with multiple damage modes

引用

Theoretical & Applied Mechanics Letters 2023年第4期13卷 251-260页

作者： Yumei Ye Qiang Yang Jingang Zhang Songhe Meng Jun Wang Xia Tang School of Mechanical Technology Wuxi Institute of TechnologyWuxi 214121China National Key Laboratory of Science and Technology for National Defence on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Astronautical Systems Engineering Beijing 100076China

Dynamic Bayesian networks(DBNs)are commonly employed for structural digital twin *** present,most researches only consider single damage mode *** is not sufficient for a reusable spacecraft as various damage modes may occur during its service life.A reconfigurable DBN method is proposed in this *** structure of the DBN can be updated dynamically to describe the interactions between different *** common damages(fatigue and bolt loosening)for a spacecraft structure are considered in a numerical *** results show that the reconfigurable DBN can accurately predict the acceleration phenomenon of crack growth caused by bolt loosening while the DBN with time-invariant structure cannot,even with enough *** definition of interaction coefficients makes the reconfigurable DBN easy to track multiple damages and be extended to more complex *** method also has a good physical interpretability as the reconfiguration of DBN corresponds to a specific *** predictions do not require precise knowledge of reconfiguration conditions,making the method more practical.

关键词： Dynamic Bayesian network Reusable spacecraft Damage Reconfiguration

来源：评论

学校读者我要写书评

暂无评论

Multiple defects renovation and phase reconstruction of reduced-dimensional perovskites via in situ chlorination for efficient deep-blue(454 nm)light-emitting diodes

引用

Light(science & Applications) 2025年第4期14卷 1041-1050页

作者： Mubing Yu Tingxiao Qin Gang Gao Kelei Zu Dongming Zhang Nan Chen Dengke Wang Yong Hua Hong Zhang Yong-Biao Zhao Jiaqi Zhu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology150080 HarbinChina Zhengzhou Research Institute Harbin Institute of Technology450046 ZhengzhouChina Beijing Academy of Quantum Information Sciences 100193 BeijingChina Center for Optoelectronics Engineering Research School of Physics and AstronomyYunnan University650500 KunmingChina Yunnan Key Laboratory for Micro/Nano Materials&Technology School of Materials and EnergyYunnan University650500 KunmingChina Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of Education Harbin Institute of Technology150080 HarbinChina

Deep-blue perovskite light-emitting diodes(PeLEDs)based on reduced-dimensional perovskites(RDPs)still face a few challenges including severe trap-assisted nonradiative recombination,sluggish exciton transfer,and undesirable bathochromic shift of the electroluminescence spectra,impeding the realization of high-performance ***,an in situ chlorination(isCl)post-treatment strategy was employed to regulate phase reconstruction and renovate multiple defects of RDPs,leading to superior carrier cooling of 0.88 ps,extraordinary exciton binding energy of 122.53 meV,and higher photoluminescence quantum yield of 60.9%for RDP films with deep-blue emission at 450 *** phase regulation is accomplished via fluorine-derived hydrogen bonds that suppress the formation of small-n *** defects,including halide vacancies(shallow-state defects)and lead-chloride antisite defects(deepstate defects),are renovated via C=O coordination and hydroxy-group-derived hydrogen ***,deepblue PeLEDs with a record maximum external quantum efficiency of 6.17%and stable electroluminescence at 454 nm were demonstrated,representing the best-performing deep-blue PeLEDs.

关键词： deep blue light emitting diodes bathochromic shift regulate phase reconstruction exciton binding energy renovate multiple defects phase reconstruction carrier cooling situ chlorination

来源：评论

学校读者我要写书评

暂无评论

Grain growth kinetics and densification mechanism of(TiZrHfVNbTa)C high-entropy ceramic under pressureless sintering

引用

Journal of Materials science & technology 2022年第15期110卷 57-64页

作者： Wen Zhang Lei Chen Chenguang Xu Xuming Lv Yujin Wang Jiahu Ouyang Yu Zhou School of Materials Science and Engineering Institute for Advanced CeramicsHarbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of TechnologyHarbin 150001China Science and Technology on Particle Transport and Separation Laboratory Tianjin 300180China

The grain growth kinetics and densification mechanism of(TiZrHfVNbTa)C high-entropy carbide ceramic are investigated in this work.A single phase carbide with a rock-salt structure is formed until 2300°C,below which an apparent aggregation of V,Zr and Hf *** is associated with the slow diffusion rate of V element as well as the relatively poor solubility of VC in HfC(as well as ZrC).The grain growth mechanism gradually changes from surface diffusion to volume diffusion and then grain boundary diffusion with increasing sintering *** is attributed to the variation of activation energy of grain *** densification mechanism is principally dominated by the mass transport through lattice diffusion with the activation energy of 839±53 k J/*** the design of two-step sintering,it is verified that the solid solution formation can effectively promote the densification process.

关键词： High-entropy carbide ceramic Pressureless sintering Grain growth kinetics Densification mechanism

来源：评论

学校读者我要写书评

暂无评论

advanced synthesis strategy for high-density amorphous SiBCN ceramics with exceptional oxidation resistance via vacuum pyrolysis and spark plasma sintering

引用

Ceramics International 2025年

作者： Yan, Qiang Chen, Siyao Yang, Xuan Chen, Xinhao Li, Jinping Meng, Songhe National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China

Development of improved synthesis strategies for amorphous SiBCN ceramics is essential to their service as high-temperature structural materials for engineering applications. Herein, we report the successful fabrication of high-density (2.26 g/cm3) and oxidation-resistant amorphous SiBCN ceramics through a synergistic approach combining spark plasma sintering (SPS) and polymer-derived vacuum pyrolysis. Comprehensive characterization revealed that the optimized processing route significantly reduced open porosity to 2.39 % while enhancing the graphitization transition of free carbon and constructing a complex C-B-N 3D network structure. These microstructural improvements effectively suppressed oxidation activity and crystallization propensity. Notably, the vacuum-pyrolyzed SiBCN ceramics exhibited outstanding high-temperature oxidation resistance, with a minimal mass change of 1.17 mg/cm2 and the formation of a dense, intact oxide layer. Kinetic analysis indicated an oxidation rate constant of 40.2 μm2/h, which was significantly reduced by 87.8 % compared to the argon-pyrolyzed counterpart (330.7 μm2/h). This improvement was attributed to the synergistic effects of graphitization-induced barrier formation and enhanced network connectivity in the C-B-N architecture. These findings highlight the critical role of vacuum pyrolysis in tailoring microstructural features for superior oxidation resistance and thermal stability. The proposed synthesis methodology provides a novel framework for developing high-performance ceramic materials with tailored properties for extreme environment applications. © 2025

关键词： High temperature applications

来源：评论

学校读者我要写书评

暂无评论

An SPH model reconstruction framework with fragment mapping method for multiplate structure hypervelocity impact simulation

引用

Advances in Space Research 2025年第11期75卷 8140-8157页

作者： Cao, Xu Zhou, Jianqiu Xu, Huadong Song, Di Miao, Changqing National Key Laboratory of Science and Technology on Advanced Composites in Special Environment Harbin Institute of Technology Harbin150001 China School of Basic Medical Sciences Harbin Medical University Harbin150001 China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Sichuan Chengdu611731 China

Smoothed Particle Hydrodynamics (SPH) method is widely used in hypervelocity impact analysis, but it is computationally inefficient for common multiplate structures, such as multi-shock, mesh double-bumper, and stuffed shields. To improve the efficiency and accuracy of the SPH method, a reconstruction framework is proposed, including a fragment identification method, a fragment mapping method, and a sequential modeling and simulation approach. In the reconstruction framework, the total impact simulation of a multiplate structure consisting of n plates is decomposed into n individual impacts on each plate. To reduce the computation for each impact, a fragment identification method and a fragment mapping method are developed. Fragments generated from the impact with the i-th plate (i © 2025 COSPAR

关键词： 3D reconstruction

来源：评论

学校读者我要写书评

暂无评论

Selective thermal emission and infrared camouflage based on layered media

引用

Chinese Journal of Aeronautics 2023年第3期36卷 212-219页

作者： Qingxiang JI Xueyan CHEN Vincent LAUDE Jun LIANG Guodong FANG Changguo WANG Rasoul ALAEE Muamer KADIC National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China Institute FEMTO-ST CNRSUniversity Bourgogne Franche-Comte´Besanc¸on 25000France Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Department of Physics University of OttawaOttawaK1N 6N5Canada Institute of Theoretical Solid State Physics Karlsruhe Institute of TechnologyKarlsruhe D-76131Germany

Infrared camouflage based on artificial thermal metasurfaces has recently attracted significant *** eliminating thermal radiation differences between the object and the background,it is possible to hide a given object from infrared *** camouflage is an important element that increases the survivability of aircraft and missiles,by reducing target susceptibility to infrared guided ***,a simple and practicable design is theoretically presented based on a multilayer film for infrared stealth,with distinctive advantages of scalability,flexible fabrication,and structural *** multilayer medium consists of silicon substrate,carbon layer and zinc sulfide film,the optical properties of which are determined by transfer matrix *** locally changing the thickness of the coating film,the spatial tunability and continuity in thermal emission are demonstrated.A continuous change of emissive power is further obtained and consequently implemented to achieve thermal camouflage *** addition,other functionalities,like thermal illusion and thermal coding,are demonstrated by thickness-engineered multilayer films.

关键词： Heat transfer manipulation Infrared camouflage Multilayer media Selective thermal emission Thermal illusion Transfer matrix method

来源：评论

学校读者我要写书评

暂无评论

Surface reconstruction of Se-doped NiS_(2) enables high-efficiency oxygen evolution reaction

引用

Journal of Energy Chemistry 2023年第9期84卷 173-180页

作者： Mengxin Chen Yuanyuan Zhang Ran Wang Bin Zhang Bo Song Yanchao Guan Siwei Li Ping Xu MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Key Laboratory of Micro-systems and Micro-structures Manufacturing Ministry of EducationHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Institute of Industrial Catalysis School of Chemical Engineering and TechnologyXi’an Jiaotong UniversityXi’an 710049ShaanxiChina

Surface reconstruction of electrocatalysts has been widely witnessed during the electrochemical ***,NiS_(2),NiSe_(2), and Se doped NiS_(2)(Se-NiS_(2)) are fabricated for oxygen evolution reaction(OER) through a mild sulfuration and/or selenylation process of Ni(OH)_(2) supported on carbon cloth(CC).Through careful in-situ Raman spectroscopy and ex-situ X-ray photoelectron spectroscopy,surface reconstruction of NiS_(2),NiSe_(2),and Se-NiS_(2) during the OER process has been revealed.A potentialdependent study shows that Se-NiS_(2) undergoes surface evolution at lower potentials and requires the lowest potential for conversion to NiOOH as a highly OER-active species,accompanied by the leaching of SO_(4)^(2-) and SeO_(4)^(2-) that can again be adsorbed on the catalyst surface to enhance the catalytic *** functional theory(DFT) calculations confirm that Se-NiS_(2) is more susceptible to surface oxidation through the OER ***,Se-NiS_(2) exhibits outstanding OER activity and stability in alkaline conditions,requiring an overpotential of 343 mV at a current density of 50 mA cm^(-2).A novel insight is provided by our work in understanding the surface reconstruction and electrocatalytic mechanism of Ni-based chalcogenides.

关键词： Oxygen evolution reaction Se-NiS_(2) In-situ Raman spectroscopy Anion leaching Surface reconstruction

来源：评论

学校读者我要写书评

暂无评论

Observation of Enhanced Faraday Effect in Eu-Doped Ce:YIG Thin Films

引用

Chinese Physics Letters 2023年第12期40卷 155-159页

作者：张晗旭朱森寅湛劲王先杰王一姚泰 N.I.Mezin 宋波 School of Physics Harbin Institute of TechnologyHarbin 150001China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China A.A.Galkin Donetsk Institute for Physics and Engineering Rosa Luxemburg Str.7283114 DonetskUkraine Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450046China Frontiers Science Center for Matter Behave in Space Environment Harbin Institute of TechnologyHarbin 150001China

Ce:YIG thin films are taken as an ideal candidate for magneto-optical devices with giant Faraday effect in the near-infrared range,but it is hindered by a limited Ce^(3+)/Ce^(4+)ratio and a high saturation driving *** address this issue,Eu doping can increase the Faraday rotation angle by ~40% to 1.315×10^(4)deg/cm and decrease the saturation driving field by ~38%to 1.17 kOe in Eu_(0.75)Ce_(1)Y_(1.25)Fe_(5)O_(12 )compared to Ce_(1)Y_(2)Fe_(5)O_(12)*** mechanism is attributed to the conversion of Ce^(4+)to Ce^(3+)and the weakening of ferrimagnetism by Eu *** work not only provides strategies for improving Ce^(3+)/Ce^(4+) ratio in Ce:YIG,but also develops(Eu,Ce):YIG with a promising Faraday rotation angle for magneto-optical devices.

关键词： Faraday field YIG

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：