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In-situ TEM study of the effect of hydrogen-helium ratio on defect characteristics in Fe9Cr1.5W0.4Si F/M steel during H_(2)^(+)&He^(+)simultaneous irradiation

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Journal of Materials Science & Technology 2024年第6期173卷 192-201页

作者： Dewang Cui Ziqi Cao Kun He Yuanming Li Xi Qiu guang ran College of Energy Xiamen UniversityXiamen 361102China Fujian Provincial Nuclear Energy Engineering Technology Research Center Xiamen 361102China Science and Technology on Reactor Fuel and Materials Laboratory Chengdu 610041China Nuclear Power Institute of China Chengdu 610041China Science and Technology on Reactor System Design Technology Laboratory Chengdu 610041China

The effect of hydrogen and helium interaction,especially H-He ratio,on the irradiation behavior of nuclear materials has not yet been ***,this is an important basis for evaluating the irradiation properties of nuclear materials and developing high irradiation resistant ***,30 keV H_(2)^(+)and He^(+)dual beams with four H-He ratios of 0:10,3:10,15:10,and 30:10 were used to irradiate the newly developed Fe9Cr1.5W0.4Si F/M steel in TEM to in-situ study the interaction and ratio effect of hydrogen and *** addition of H atoms significantly promoted the nucleation of dislocation loops and *** the early stage of irradiation,the average size and density of dislocation loops increased with the increase of H-He ***,the larger the H-He ratio,the easier it was to form a complex dislocation ***,the final saturation size of bubbles increased with the increase of H-He *** was first found that the swelling was affected by H concentrations,with high H concentrations slowing down the increase in *** a certain irradiation dose,a specific H-He ratio would lead to a swelling peak of Fe9Cr1.5W0.4Si F/M *** super-sized bubbles at grain boundaries(GBs)were found after H addition,resulting in a bigger swelling of GBs than the *** the swelling of the GBs and the matrix show a dependence on the H-He *** current work is of great significance for understanding the interaction between hydrogen and helium in nuclear materials.

关键词： Dose ratio effect Ferritic-martensitic steel Hydrogen&helium synergetic irradiation In-situ TEM

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基于静力试验的柱端铰型受控摇摆钢筋混凝土框架地震响应数值分析

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工程力学 2024年第S01期41卷 258-265页

作者：杨睿鲁亮谢广然同济大学结构防灾减灾工程系上海200092 广州机场建设投资集团有限公司广州510000

柱端铰型受控摇摆钢筋混凝土框架(CR-RCFC)是一种新型的可恢复功能结构,通过摇摆节点的构造来“弱化”结构整体抗侧刚度,从而达到减小地震响应的目的。CR-RCFC结构在振动台试验中呈现了在中震和大震作用下“主体构件免损伤,耗能构件易... 详细信息

柱端铰型受控摇摆钢筋混凝土框架(CR-RCFC)是一种新型的可恢复功能结构,通过摇摆节点的构造来“弱化”结构整体抗侧刚度,从而达到减小地震响应的目的。CR-RCFC结构在振动台试验中呈现了在中震和大震作用下“主体构件免损伤,耗能构件易更换”的韧性抗震效果。振动台试验后进行低周反复静载试验得到拆除阻尼器后的CR-RCFC结构柱铰节点弯矩-转角滞回曲线和转动刚度等抗震性能参数。利用静力试验得到的结构抗震性能参数进行结构地震响应数值模拟,将数值模拟结果与振动台试验结果进行对比分析。对比分析结果表明:通过静力试验数据可以精确得到CR-RCFC结构节点抗震性能参数,根据该抗震性能参数进行的数值模拟结果与振动台试验结果吻合较好。

关键词：柱端铰受控摇摆钢筋混凝土框架低周反复试验节点力学模型数值模拟

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新型建筑结构材料在抗震设计中的应用与效果评估

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佛山陶瓷 2024年第9期34卷 147-149页

作者：金广然中国刑事警察学院沈阳110000

本文从专业视角出发,通过实践案例和技术分析,探讨新型建筑结构材料在抗震设计中的应用效果。研究表明,合理运用新型材料可以有效提升建筑抗震性能,减少地震灾害损失,但应用过程中存在材料成本高、技术标准不完善等问题。未来应加强基... 详细信息

本文从专业视角出发,通过实践案例和技术分析,探讨新型建筑结构材料在抗震设计中的应用效果。研究表明,合理运用新型材料可以有效提升建筑抗震性能,减少地震灾害损失,但应用过程中存在材料成本高、技术标准不完善等问题。未来应加强基础研究,完善设计规范,推动新型建筑结构材料在抗震设计领域的创新发展。

关键词：新型建筑结构材料抗震设计应用效果评估

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绿色建筑中混凝土材料的应用与优化

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佛山陶瓷 2024年第10期34卷 147-149页

作者：金广然中国刑事警察学院沈阳110000

本文针对绿色建筑工程中混凝土施工技术的应用进行了深入探讨。文章首先阐述了绿色建筑的概念及其在建筑行业中的重要性,然后重点分析了混凝土施工技术在绿色建筑中的应用要点,包括优化混凝土配合比、应用混凝土泵送技术、加强混凝土养... 详细信息

本文针对绿色建筑工程中混凝土施工技术的应用进行了深入探讨。文章首先阐述了绿色建筑的概念及其在建筑行业中的重要性,然后重点分析了混凝土施工技术在绿色建筑中的应用要点,包括优化混凝土配合比、应用混凝土泵送技术、加强混凝土养护管理等方面。通过实际工程案例的数据分析,证明了合理应用混凝土施工技术可以有效提高绿色建筑的施工质量,降低能耗和环境影响,实现建筑的可持续发展。本文对于指导绿色建筑工程中混凝土施工技术的应用具有重要的理论和实践价值。

关键词：绿色建筑混凝土施工技术配合比优化新型材料泵送技术

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Effect of dose rate on the characteristics of dislocation loops in palladium:In-situ TEM analysis during 30 keV H_(2)^(+)irradiation

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Journal of Materials Science & Technology 2023年第19期150卷 86-95页

作者： Dewang Cui Ziqi Cao Yifan Ding Yipeng Li guang ran College of Energy Xiamen UniversityXiamen 361102China Fujian Research Center for Nuclear Engineering Xiamen 361102China

Ion irradiation is usually used to simulate neutron irradiation to accelerate the evaluation of the irradia-tion behavior of reactor ***,the validity of using a high damage rate of ion irradiation to simulate a low damage rate of neutron irradiation has always been a controversial ***,the effect of two dose rates(2.94×10^(-6) and 7.35×10^(-5) dpa s^(-1))on the characteristics and evolution of dislo-cation loops in palladium was studied in situ during 30 keV H2+irradiation using transmission electron *** dose rate obviously affected the nucleation rate and growth rate of dislocation loops,the types(Frank loops or perfect loops)of dislocation loops,and the irradiation hardening and total damage obtained from the product of average loop size and loop *** the same irradiation dose,a high dose rate would lead to high loop density,small average loop size,low loop growth rate,and low irra-diation hardening and damage induced by loops in pure ***,it was found for the first time that a high dose rate was beneficial to the generation of perfect dislocation *** effect of dose rate was attributed to the different dynamic equilibrium results between the effective generation rate of point defects and their absorption rate by existing *** present results show that the effect of dose rate should be considered when using ion irradiation to simulate neutron irradiation to evaluate the irradiation damage to materials.

关键词： Palladium Hydrogen irradiation In-situ TEM observation Dislocation loop Dose rate

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In-situ TEM investigation of dislocation loop reaction and irradiation hardening in H_(2)^(+)-He^(+) dual-beam irradiated Mo

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Journal of Materials Science & Technology 2022年第12期107卷 14-25页

作者： Yipeng Li guang ran Xinyi Liu Qing Han Xiuyin Huang Yifan Ding College of Energy Xiamen UniversityXiamen 361102China Fujian Research Center for Nuclear Engineering Xiamen 361102China

Through in-situ TEM observation during 30 keV H_(2)^(+)-He^(+) dual-beam irradiation at 723 K,the reaction and transformation of dislocation loops in pure Mo were investigated,especially for*** could directly cause the formation of 1/2loops andloops,but 1/2loops were ***-situ observation confirmed the formation mechanism ofloops,including direct irradiation induced mechanism,1/2loop direct conversion mechanism,and reaction mechanism of two 1/2***,the reaction of two 1/2loops to produceloop should not require the strict size similarity *** reaction between 1/2loops could also produce 1/2loop,which was essentially a process in which one loop absorbed another *** yield strength increment caused by irradiation-induced loops was analyzed,and its saturation value reached0.48 GPa at 0.06 *** with single He+irradiation,the number density and average diameter of loops increased significantly and more serious damage was caused under the synergistic effect of hydrogen and *** mechanism based on in-situ experimental observation was discussed in depth.

关键词： In-situ TEM observation Dislocation loop Hydrogen helium irradiation Molybdenum Irradiation hardening

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Nucleation and growth of helium bubble at(110) twist grain boundaries in tungsten studied by molecular dynamics

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Chinese Physics B 2019年第8期28卷 232-240页

作者： Fang-Biao Li guang ran Ning Gao Shang-Quan Zhao Ning Li College of Energy Xiamen UniversityXiamen 361102China Institute of Modern Physics Chinese Academy of SciencesLanzhou 73000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100094China

Migration of He atoms and growth of He bubbles in high angle twist grain boundaries(HAGBs)in tungsten(W)are investigated by atomic simulation *** energy and free volume(FV)of grain boundary(GB)are affected by the density and structure of dislocation patterns in *** migration energy of the He atom between the neighboring trapping sites depends on free volume along the migration path at grain *** region of grain boundary around the He bubble forms an ordered crystal structure when He bubble grows at certain grain *** He atoms aggregate on the grain boundary plane to form a plate-shape ***,high grain boundary energy(GBE)results in a large volume of He ***,the nucleation and growth of He bubbles in twist grain boundaries depend on the energy of grain boundary,the dislocation patterns and the free volume related migration path on the grain boundary plane.

关键词： tungsten dislocation patterns ordered grain boundary structure plate-shape He bubble

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Photo- and Electro-Luminescence at 1.54µm from Er^(3+) in SiC:Er_(2)O_(3) Films and Structures

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Chinese Physics Letters 2011年第7期28卷 282-285页

作者： YIN Yang ran guang-Zhao ZHANG Bin QIN Guo-Gang School of Physics and the State Key Laboratory for Mesoscopic Physics Peking UniversityBeijing 100871 Institute of Modern Physics Fudan UniversityShanghai 200433

SiC:Er_(2)O_(3) films with different ratios of SiC to SiC:Er_(2)O_(3) are deposited on p−type Si substrates by the magnetron co-sputtering technique,which was fully compatible with current Si processing *** room temperature 1.54µm photoluminescence(PL)from Er3+ions in the SiC:Er_(2)O_(3) films is observed and the PL intensity at 1.54µm is enhanced by about 40 times with increasing Er concentration in the films from 0.8 to 22 at.%under both direct and indirect *** 1.54µm electroluminescence from the structure of indium tin oxide(ITO)/n+−Si/SiC:Er_(2)O_(3)/p−Si with suitable ratios of SiC to SiC:Er_(2)O_(3)is measured under forward biases.

关键词： (3) excitation films

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In-situ TEM study on the evolution of dislocation loops and bubbles in CeO_(2)during Kr^(+)single-beam and Kr^(+)-H_(2)^(+)dual-beam synergetic irradiation

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Journal of Materials Science & Technology 2022年第28期123卷 49-59页

作者： Ziqi Cao guang ran Zhen Wang Yipeng Li Xiaoyong Wu Lu Wu Xiuyin Huang Huajun Mo College of Energy Xiamen UniversityXiamen 361102China The First Sub-Institute Nuclear Power Institute of ChinaChengdu 610041China Fujian Provincial Nuclear Energy Engineering Technology Research Center Xiamen 361102China

CeO_(2)is widely used as the nonradioactive surrogate fuel of UO_(2)when studying the irradiation performance of UO_(2).The evolution and characteristics of dislocation loops and bubbles in CeO_(2)foils were studied by in-situ transmission electron microscopy(TEM)observation during 400 ke V Kr^(+)&30 ke V H_(2)^(+)dual-beam synergetic irradiation and 400 ke V Kr^(+)single-beam irradiation at 1073 *** rotation of the habit plane of dislocation loops induced by above ion irradiation was found in the CeO_(2)for the first time,such as from[211]to[311]and then to[100].The rafted loops were first observed under Kr^(+)&H_(2)^(+)dual-beam synergetic irradiation,which not only had similar[111]direction,but also belonged to perfect dislocation loops(PDLs).The rafted loops were formed not only by the growth of loops that absorbed irradiation defects,but also by the combination of ***,this phenomenon of loop rafting was not obvious during Kr single-beam *** was first found that Kr^(+)irradiation induced the change of Burgers vectors of *** absorption of large PDLs to small PDLs was also *** average size and areal number density of dislocation loops and gas bubbles as a function of irradiation dose were constructed,which showed that the addition of H_(2)^(+)obviously affected the characteristics of dislocation loops and gas bubbles and the swelling of CeO_(2).

关键词： Nuclear Fuel Cerium dioxide In-situ TEM Irradiation Dislocation Bubbles

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Hydrogen Peroxide Sensor Based on Horseradish Peroxidase Combined with CaCO_3 Microspheres and Gold Nanoparticles

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Chemical Research in Chinese Universities 2011年第5期27卷 875-879页

作者： ZHENG LI JIANG Feng-hua MA guang-ran ZHUANG Qian-fen LI Feng Marine Ecology Research Center First Institute of Oceanography State Oceanic Administration Qingdao 266061 P. R. China Shandong Provincial Key Laboratory of Biochemical Analysis College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 t~ R. China

Direct electrochemistry and electrocatalysis of horseradish peroxidase（HRP） were achieved by entrapping the enzyme between CaCO3 microspheres and gold nanoparticles through forming sandwich configuration （CaCO3-HRP-AuNPs）. Polyanion, poly（styrene sulfonate）（PSS）, was hybrid with CaCO3 microspheres to increase the surface negative charges for binding with HRP through electrostatic interaction. After the bioconjugate CaCO3 PSS-HRP was entrapped in chitosan based sol-gel（CS-GPTMS） film, HRP was encapsulated by in situ formation of an outer layer of AuNPs through electrochemical reduction of HAuCl4. The composite film containing AuNPs, CaCO3-PSS-HRP bioconjugates and CS-GPTMS can provide favorable microenvironment for HRP to perform direct electron transfer at glassy carbon electrode（GCE）. HRP retained its bioelectrocatalytic activity and lead to sensitive and fast amperometric response for the determination of H2O2. H2O2 could be detected in a very wide linear range from 5.0×10-6 mol/L to 7.1×10-2 mol/L. The sandwich configuration of CaCO3-biomolecules-AuNPs could serve as a versatile platform for enzyme immobilization and biosensing.

关键词： Direct electrochemistry Horseradish peroxidase(HRP) CaCO3 microsphere Chitosan based sol-gel

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