检索结果-内蒙古大学图书馆

Enhanced strength and conductivity of CuCrZr/CuAlCrFeNi 2.5 multi-principal element alloy composite via interface and configuration engineering

引用

Journal of Materials Research and technology 2025年 36卷 6834-6845页

作者： Tao Hong Jie Chen Hongmei Chen Bohua Yu Ning Ding Xinxin Yang Chaoran Wang Chi Zhang Weizong Bao Zeyun Cai Guoqiang Xie School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen 518055 China Institute of Special Environments Physical Sciences Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001 China

Constructing multi-modal interface and configuration design is a highly promising strategy for the development of next-generation electrical contact composites. The CuAlCrFeNi 2.5 dual-phase multi-principal element alloy (MPEA) is designed as a reinforcement phase for copper-based composites, dual-phase enhanced configuration of multi-modal interfaces ensures a good combination of strength and conductivity, fabricated via a ball milling (BM)-spark plasma sintering (SPS) process. Further optimization of the interface and microstructural configuration, controlled by sintering temperature, achieving an outstanding combination of yield strength of 852 ± 20 MPa and electrical conductivity of 39.76 ± 0.13 International Annealed Copper Standard (IACS) at a sintering temperature of 723 K. A comprehensive analysis of the strengthening and conductivity mechanisms reveals the role of multi-modal interfaces and complex-scale configurations in achieving this balance. This work provides novel insights into the development of advanced ultra-high strength conductive materials.

关键词： Spark plasma sintering Copper-based composites Mechanical properties Electrical conductivity

来源：评论

学校读者我要写书评

暂无评论

Research on the Crystal Growth, Band Structure and Luminescence Mechanism of (CH3NH3)2HgI4

arXiv

引用

arXiv 2025年

作者： Liu, Linlin Chen, Zuanquan Yang, Wensi Zhang, Sen Zhu, Jiaqi National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin150080 China

Nuclear radiation detectors play a crucial role in fields such as nuclear safety and medical imaging. The core of their performance lies in the selection of detection materials. Semiconductor detectors have become a hot topic in current research due to their advantages such as small size, good energy resolution, and high detection efficiency. As one of the most promising materials for fabricating room - temperature nuclear radiation semiconductor detectors, HgI2 exhibits excellent detection performance due to its high atomic number, large band gap, strong ray - stopping power, and high volume dark resistivity. However, issues such as poor chemical stability and low vacancy mobility of HgI2 limit its development. Therefore, researchers have carried out inorganic doping/organic hybridization on it. By introducing the organic ligand CH3NH3I, the synthesis of organic - inorganic hybrid compounds based on HgI2 is expected to significantly improve the stability of HgI2. Research on organic - inorganic hybrid metal halide crystals shows that this material has great application potential in the field of luminescent materials. In this paper, the crystal morphologies of (CH3NH3)2HgI4 under vacuum and in different solvent - anti - solvent systems were simulated. The crystal morphology of (CH3NH3)2HgI4 in the ethyl acetate - toluene system is long - plate - shaped, with the (002) plane being the largest exposed plane. Subsequently, a flake - shaped crystal with dimensions of 10 mm×9 mm×1 mm was prepared by the solution method in this system. XRD diffraction analysis revealed that its largest exposed plane is consistent with the morphology simulation results in this solvent system. Calculations show that (CH3NH3)2HgI4 is an indirect - band - gap semiconductor (Eg=3.28 eV). The ultraviolet - visible spectrum shows that its optical band gap is 3.11 eV, which is smaller than the calculated value. Therefore, it is speculated that there may be exciton luminescence in (CH3NH3)2HgI4. T

关键词： Crystal atomic structure

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： Qiang Yan Siyao Chen Xuan Yang Xinhao Chen Jinping Li Songhe Meng National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150080 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/cm 3 ) 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/cm 2 and the formation of a dense, intact oxide layer. Kinetic analysis indicated an oxidation rate constant of 40.2 μm 2 /h, which was significantly reduced by 87.8 % compared to the argon-pyrolyzed counterpart (330.7 μm 2 /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.

关键词：

来源：评论

学校读者我要写书评

暂无评论

An experimental study of ultra-high temperature ceramics under tension subject to an environment with elevated temperature,mechanical stress and oxygen

引用

science China(Technological sciences) 2019年第8期62卷 1349-1356页

作者： HAN XinXing XU ChengHai JIN Hua XIE WeiHua MENG SongHe National Key Laboratory of Science and Technology for National Defence on Advanced Composites in Special Environments Harbin Institute of Technology

Ultra-high temperature ceramic(UHTC) composites are widely used in high-temperature environments in aerospace applications. They experience extremely complex environmental conditions during service, including thermal, mechanical and chemical loading. Therefore, it is critical to evaluate the mechanical properties of UHTCs subject to an environment with elevated temperature, mechanical stress and oxygen. In this paper, an experimental investigation of the uniaxial tensile properties of a ZrB_2-SiC-graphite subject to an environment with a simultaneously elevated temperature, mechanical stress and oxygen is conducted based on a high-temperature mechanical testing system. To improve efficiency, an orthogonal experimental design is used. It is suggested that the temperature has the most important effect on the properties, and the oxidation time and stress have an almost equal effect. Finally, the fracture morphology is characterized using scanning electron microscopy(SEM), and the mechanism is investigated. It was concluded that the main fracture mode involved graphite flakes pulling out of the matrix and crystalline fracture, which indicates the presence of a weak interface in the composites.

关键词： ultra-high temperature ceramics environment with elevated temperature mechanical stress and oxygen uniaxial tensile strength orthogonal experimental design

来源：评论

学校读者我要写书评

暂无评论

Self-Adaptive Reflectance Film for Passive Temperature Regulation in Diverse environments

引用

advanced science 2025年

作者： Yang, Shuo Tang, Sizhe Cai, Yufeng Ye, Zhiming Zou, Xiangbin Yuan, Xueyu Song, Yujie Li, Bing Tang, Dongyan Liu, Ming School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin150001 China State Key Laboratory of Special Functional Waterproof Materials Beijing Oriental Yuhong Waterproof Technology Co. Ltd Beijing101111 China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo315201 China Advanced Energy Science and Technology Guangdong Laboratory Huizhou516000 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China

Passive thermal-regulation strategies have become increasingly important due to the strain alleviated on power grids for temperature management. Designing a system capable of automatically switching between cooling and heating modes in response to changing ambient conditions presents several specific challenges that engineers and researchers are actively addressing. In this research, a CaCl2 incorporated PNIPAM coated fluorinated poly(aryl ether) (FPAE) porous film with tunable reflectance is developed. The aim is to mitigate the reliance on active cooling systems, which consume significant amounts of energy. The moisture-temperature dual sensitive film exhibits a tunable reflectance range between 91.1% and 39.1% via phase change of the PNIPAM layer. Coupled with an infrared emissivity of 96.0%, a daytime cooling of 10 °C compared to the control experiment is achieved. Coating the film with a photothermal layer results in an adaptive Janus film that is capable of autonomous switching between heating and cooling, and demonstrates a heating of 22.5 °C in a cold environment. The facile preparation method, excellent cyclic stability, mechanical properties, and UL-94 V-0 rating enable promising applications of the smart film under diverse living environments. © 2025 The Author(s). advanced science published by Wiley-VCH GmbH.

关键词： Self tuning control systems

来源：评论

学校读者我要写书评

暂无评论

Experiment and evaluation of wrinkling strain in a corner tensioned square membrane

引用

Acta Mechanica Sinica 2014年第3期30卷 430-436页

作者： Lan Lan Chang-Guo Wang Hui-Feng Tan Center for Composite Materials National Key Laboratory of Science and Technology on Advanced Composites in Special EnvironmentsHarbin Institute of Technology

Prediction of wrinkling characteristics is strongly correlated with the strain perpendicular to wrinkling direc- tion. In this paper, the strain field of wrinkled membrane is tested by VIC-3D system based on the digital image correlation technique. Experimental results are validated by the tension wrinkling simulation. The experimental strain perpendicular to wrinkling direction is analyzed in depth. The wrinkling strain of a square wrinkled membrane under corner tension is extracted from experimental strain perpendicular to wrinkling direction. A quantitative characterization format of the experimental wrinkling strain is proposed. A modified prediction method of wrinkling amplitude is presented based on the experimental wrinkling strain. The re- sults show that the precision of modified prediction model has improved 13.2% compared with the classical prediction model. The results reveal that the modified model can give an accurate prediction of the wrinkling amplitude.

关键词： Membrane structure. Wrinkle Wrinkling strain.Digital image correlation Wrinkling amplitude

来源：评论

学校读者我要写书评

暂无评论

Crystallization Modulation and Holistic Passivation Enables Efficient Two‑Terminal Perovskite/CuIn(Ga)Se_(2)Tandem Solar Cells

引用

Nano-Micro Letters 2025年第1期17卷 205-215页

作者： Cong Geng Kuanxiang Zhang Changhua Wang Chung Hsien Wu Jiwen Jiang Fei Long Liyuan Han Qifeng Han Yi‑Bing Cheng Yong Peng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China Triumph Photovoltaic Materials Co. Ltd.No.1001 Yannan AvenueHigh‑Tech Development DistrictBengbuAnhui 233000People’s Republic of China College of Materials Science and Engineering Guilin University of TechnologyGuilin 541004People’s Republic of China State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Two-terminal(2-T)perovskite(PVK)/CuIn(Ga)Se_(2)(CIGS)tandem solar cells(TSCs)have been considered as an ideal tandem cell because of their best bandgap matching regarding to Shockley–Queisser(S–Q)***,the nature of the irregular rough morphology of commercial CIGS prevents people from improving tandem device *** this paper,D-homoserine lactone hydrochloride is proven to improve coverage of PVK materials on irregular rough CIGS surfaces and also passivate bulk defects by modulating the growth of PVK *** addition,the minority carriers near the PVK/C60 interface and the incompletely passivated trap states caused interface recombination.A surface reconstruction with 2-thiopheneethylammonium iodide and N,N-dimethylformamide assisted passivates the defect sites located at the surface and grain ***,LiF is used to create this field effect,repelling hole carriers away from the PVK and C60 interface and thus reducing *** a result,a 2-T PVK/CIGS tandem yielded a power conversion efficiency of 24.6%(0.16 cm^(2)),one of the highest results for 2-T PVK/CIGS TSCs to our *** validation underscores the potential of our methodology in achieving superior performance in PVK/CIGS tandem solar cells.

关键词： PVK/CIGS TSCs Irregular rough surfaces Modulating the growth PVK/C60 interface recombination

来源：评论

学校读者我要写书评

暂无评论

Nano-TiO_(2) coate d nee dle carbon fib er reinforced phenolic aerogel composite with low density, excellent heat-insulating and infrared radiation shielding performance

引用

Journal of Materials science & technology 2023年第21期152卷 181-189页

作者： Yiwu Pan Xiangyu Jin Hebing Wang He Huang Can Wu Xiaojie Yan Changqing Hong Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China

High-performance thermal protection materials(TPMs)for spacecraft are becoming current research *** polymer-based ablators are considered to be the most promising candidates for TPMs due to their excellent designability and *** this study,a unique nano-TiO_(2) coated needled carbon fiber felt/phenolic resin aerogel composite(TiCF/PR)is *** the anatase nano-TiO_(2) was in-situ coated on the surface of carbon fibers uniformly through the sol-gel and calcination method,then,the phenolic resin aerogel was in-situ synthesized in the nano-TiO_(2) coated needled carbon fiber felt(TiCF)preform through vacuum impregnation and solvothermal *** as-prepared aerogel com-posite possesses a low density(0.30–0.32 g/cm^(3)),low thermal conductivity(0.034 and 0.312 W/(m K)in the z and xy directions),and excellent thermal stability with 13.86%residual weight at 1300℃ in *** is worthwhile to note that the TiCF/PR composite exhibits excellent antioxidant ablation and infrared(IR)radiation shielding properties in a high-temperature heating *** an oxygen-acetylene blaze heating of 1.5 MW/m^(2) for 150 s,the linear ablation rates decreased by 13.4%,and the backside temperature reduced from 322.3 to 179.1℃ compared to that of the sample without nano-TiO_(2) *** experimental and theoretical analysis showed that the present TiCF/PR nanocomposite has competitive and potential application prospects in the field of future TPMs.

关键词： Carbon fiber Opacifier Mechanical properties Thermal properties Ablation performance

来源：评论

学校读者我要写书评

暂无评论

Intrinsic ion migration-induced susceptible two-dimensional phase-transition memristor with ultralow power consumption

引用

science Bulletin 2025年

作者： Qin, Lanhao Yu, Yimeng Fang, Cheng Liu, Yujie Zhu, Kaichen Ouyang, Decai Liu, Shenghong Song, Bailing Zhou, Ruochen Lanza, Mario Hu, Wenhua Wu, Jinsong Li, Yuan Zhai, Tianyou State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Center of Hydrogen Science State Key Laboratory of Metal Matrix Composites School of Materials Science and Engineering Innovation Center for Future Materials Shanghai Jiao Tong University Shanghai200240 China Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia School of Computer Science and Artificial Intelligence Wuhan University of Technology Wuhan430070 China

Two-dimensional (2D) phase-transition memristors have demonstrated transformative potential for neuromorphic computing, yet challenges like high power consumption, limited endurance, and crystal damage from external ion intercalation persist. Here, we introduce a novel 2D phase-transition memristor leveraging a paradigm-shifting mechanism by exploiting the ultrafast intrinsic Cu+ ion migration within Cu2S. This approach eliminates the need for external ion insertion, significantly reducing crystal damage and enabling exceptional cycling stability with over 400 DC cycles and 500 pulse cycles. The susceptible monoclinic-tetragonal phase-transition induced by intrinsic Cu+ migration achieves an unprecedented SET power consumption of 1 μW at 100 mV, significantly lower in currently reported phase-transition memristors. To further demonstrate the potential of intrinsic ion migration-induced (IIM) memristor, we simulated an IIM memristor crossbar array for image preprocessing in gesture recognition with a high SSIM value of 0.94, showcasing its potential for scalable neuromorphic hardware. This work establishes a new paradigm in low-power, high-performance phase-transition memristors, advancing their practical application in next-generation computing. © 2025 science China Press

关键词： Memristor Neuromorphic device Two-dimensional materials

来源：评论

学校读者我要写书评

暂无评论

Au nanospheres modified boron-doped diamond microelectrode grown via hydrogen plasma etching solid doping source for dopamine detection

引用

Journal of Materials science & technology 2020年第14期47卷 42-46页

作者： Kaili Yao Xiaojun Tan Bing Dai Jie Bai Qiaoyang Sun Wenxin Cao Jiwen Zhao Lei Yang Jiecai Han Jiaqi Zhu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin150080China

Boron doped diamond(BDD)electrode is a promising electrochemical material for detecting dopamine level in the human’s *** this work,we developed a new doping source-graphite and solid boron oxide powders to synthesize BDD film with microwave plasma chemical vapor deposition,so as to avoid using toxic or corrosive dopants,such as boroethane and *** synthesized BDD film is pinhole free and with high doping density of 8.44×10^20 cm^-3 calculated from the Raman ***,Au nanospheres were decorated on the surface of BDD film to improve electrochemical performance of the BDD *** Au nanoparticles modified BDD electrode demonstrates an excellent electrochemical response,a high sensitivity(in the range of 5μM-1 m M),and a low detection limit(~0.8μM)for detecting dopamine.

关键词： Boron doped diamond Graphite powders Boron oxide powders Optical emission spectroscopy Dopamine

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：