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In-situ TEM investigation on the evolution of He bubbles and dislocation loops in Ni-based alloy irradiated by H_(2)^(+)&He^(+)dual-beam ions

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Journal of Materials Science & Technology 2023年第7期138卷 36-49页

作者： Zhenbo Zhu Weichi Ji hefei Huang Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

The synergistic evolution mechanisms of He bubbles and dislocation loops under 30 keV H_(2)^(+)&He^(+)dual-beam ions irradiation at 650℃ in the Ni-based alloy GH3535,which is the most promising candidate structure material for molten salt reactors(MSRs),were revealed via in-situ *** nucleation,merg-ing,and change in the size of the dislocation loops and He bubbles were characterized in detail to study the influences of irradiation fluence and pre-existing dislocation loops on their *** number density of both the He bubbles and dislocation loops increases rapidly and subsequently saturates,whereas their size continuously increases with the increasing ion ***-existing dislocation loops with strong absorption characteristics grow preferentially and suppress the nucleation of dislocation loops during the dual-beam ions ***,the bubbles tend to nucleate within the dislocation loops to form bubble-loop complexes,and then decrease in their number *** details of the un-faulting processes of the Frank loops were discussed,where the energy difference between the two types of loops as well as the evolution of the inside Shockley dislocation loops dominates the unfaulting *** several evolution stages of the loop-punching mechanism are revealed,and the emitted loops can directly form perfect loops as well as unfault the neighboring Frank *** He bubbles inside the loops provide corresponding stress for the formation of rhombic loops,which can achieve rapid growth and sweep ability by merging with the neighboring ***,its dissociation to Shockley dis-location can unfault the Frank loops along their slip *** the four Frank loop variations,the edge-on Frank loop variations have the highest growth rate,followed by the perfect *** related mechanisms based on in-situ experimental observation are discussed in depth.

关键词： In-situ TEM observation Ni-based alloy Dislocation loop Punching loop Bubble-loop complex

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Synthesis and Structure of Bis(4-nitrobenzaldehyde thiosemicarbazone) Cadmium Iodide

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Chinese Journal of Structural Chemistry 2000年第4期19卷 239-243页

作者： MA Ji Long ② WU Jie Ying a TIAN Yu Peng a③ ZHAO Cun Yuan b a(Department of Chemistry, anhui University, hefei, anhui, P.R. China, 230039) b(State Key Laboratory of Coordination Chemistry, Nanjing University, 210093) 安徽大学安徽合肥 2 30 0 39 南京大学配位化学国家重点实验室江苏南京 2 1 0 0 93

The title complex, bis(4 nitrobenzaldehyde thiosemicarbazone) cadmium iodide (C 16H 16CdI 2N 8O 4S 2) crystallizes in the triclinic system, space group P 1 with a=9.632(2), b=11.227(2), c=14.031(3), α= 67.50(3), β= 86.99(3), γ= 66.64(3)°, V=1278.1 3, Z = 2, D c = 2.117gcm -3, F(000) = 772, μ =3 472mm -1 Mo Kα radiation ( λ =0.71073), R = 0.0443, wR= 0.1425 for 4529 observed reflections 〔 I>2σ(I) 〕 of 4731 independent reflections. The result shows that the structure contains CdL 2I 2 (where L = 4 nitrobenzaldehyde thiosemicarbazone) distorted tetrahedral units in which the two ligands are S bonded as monodentate to cadmium ion; the two iodide ions are also coordinated to Cd(II).

关键词： crystal structure synthesis cadmium complex nonlinear optical proporties

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A PRELIMINARY STUDY ON THE MECHANISM OF NEONATAL ALLOTRANSPLANTATION TOLERANCE——PARTICIPATION OF SUPPRESSOR CELLS IN THE MEDIATION OF NEONATAL ALLOTRANSPLANTATION TOLERANCE

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Science in China,Ser.B 1985年第4期28卷 365-372页

作者：蒋红史敏言姚立人 anhui Medical College hefei

Using a method from Billingham, an animal model of the neonatal allotransplantation tolerance of SWI to C57BL inbred mice was established and the mechanism of neonatal tolerance established by us was preliminarily *** experiment indicates that the clonal deletion theory is not the unique explanation for the neonatal tolerance and a peripheral active inhibitory mechanism including suppressor cells may participate in meditating and maintaining the neonatal *** suppressor cells in the neonatal tolerance are radioresistant, but rather sensitive to mitomyein C treatment. These results suggest that suppressor cell population may be nonhomogenous. Further studies about this problem are needed.

关键词： A PRELIMINARY STUDY ON THE MECHANISM OF NEONATAL ALLOTRANSPLANTATION TOLERANCE PARTICIPATION OF SUPPRESSOR CELLS IN THE MEDIATION OF NEONATAL ALLOTRANSPLANTATION TOLERANCE SWI MLR

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Mineral Composition and Metamorphic P-T Conditions of the Eclogitic Rocks in the Eastern Dabie Mountains and Their Genetic Implication

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Acta Geologica Sinica(English Edition) 1993年第4期67卷 387-402页

作者： Ge Ningjie, Li Shuguang, Peng Zhonghua and Liu Deliang Department of Earth and Space Sciences, University of Science and Technology of China, hefei, anhui Jiang Minxi Department of Earth and Space Sciences University of Science and Technology of China Hefei Anhui

There are obvious differences in the mineral assemblage and metamorphic P-T conditions between the eclogites from the northern and southern parts of the eastern Dabie Mountains. Those from the northern part of the mountains are developed in Alpine peridotite and gneiss. They have a mineral assemblage of garnet+diopside with no quartz, and were formed at temperatures of 600℃-740℃. Those from the southern part are developed in gneiss and marble. They consist of garnet+omphacite+less quartz and were metamorphosed at temperatures in the range of 650°-800℃. These differences suggest that the former may be formed during the metamorphism of the deep subducted oceanic crust, whereas the latter may be genetically related to the subduction of the continental crust in this area.

关键词： collisional orogen eclogitic rocks from the southern and northern parts of the Dabie Mountains T-P conditions

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AN INEQUALITY CONCERNING THE DEVIATION BETWEEN THEORETICAL AND EMPIRICAL DISTRIBUTIONS

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Chinese Annals of Mathematics 1988年第2期9卷 189-195页

作者：赵林城 Department of Mathematics University of Science and Technology of China hefei anhui China.

In this paper the author establishes an inequality concerning the uniform deviationbetween theoretical and empirical *** application in strong convergence ofnearest neighbor density estimate is also discussed.

关键词： exp AN INEQUALITY CONCERNING THE DEVIATION BETWEEN THEORETICAL AND EMPIRICAL DISTRIBUTIONS

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Chemical composition and size distribution of secondary organic aerosol formed from the photooxidation of isoprene

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Journal of Environmental Sciences 2009年第11期21卷 1525-1531页

作者： LIU Xianyun, ZHANG Weijun, WANG Zhenya, ZHAO Weixiong, TAO Ling, YANG Xibin Laboratory of Environmental Spectroscopy, anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, hefei 2.0031, China. [a]Laboratory of Environmental Spectroscopy Anhui Institute of Optics and Fine Mechanics Chinese Academy of Sciences Hefei 230031 China

Photooxidation of isoprene leads to the formation of secondary organic aerosol （SOA）. In this study, the chemical composition of SOA formed from OH-initiated photooxidation of isoprene has been investigated with gas chromatography/mass spectrometry （GC/MS） and a home-made aerosol time-of-fiight mass spectrometer. Sampling particles generated in a home-made smog chamber. The size distribution of SOA particles was detected by a TSI 3321 aerodynamic particle size spectrometer in real time. Results showed that SOA created by isoprene photooxidation was predominantly in the form of fine particles, which have diameters less than 2.5 μm. The obtained mass spectra of individual particles show that products of the OH-initiated oxidation of isoprene contain methyl vinyl ketone, methacrolein, formaldehyde, and some other hydroxycarbonyls. The possible reaction mechanisms leading to these products were also discussed.

关键词： secondary organic aerosols isoprene aerosol time-of-fiight mass spectrometer smog chamber size distribution

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Pulse Signal Distortion Characteristic in Erbium-doped Fiber Power Amplifier

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Chinese Journal of Lasers 1996年第1期B5卷 15-20页

作者： MING Hai YANG Bao LIU Yu SUN Xiaoquan XIE Jianping(Department of Physics, University of Science and Technology of China, hefei 230026, China Research Center Electronic Engineering Institute,hefei 230027, China)ZHAN Mingsheng, HUANG Qing(anhui Institute o Univ of Science and Technology of China Hefei China

In this paper, the distortion characteristic of the two kinds of pulse signal in erbium-doped fiber power amplifier is investigated. A closed-form solution describing pulse signal distortion and its numerical calculat... 详细信息

关键词： erbium-doped fiber amplifier signal distortion photon transport equations

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Crystal Structure and Third-order Nonlinear Optical Property Studies on Copper(Ⅱ) Complex Containing NS Donor Ligand

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Chinese Chemical Letters 1998年第7期9卷 691-693页

作者： Fu Xin XIE Yu Peng TIAN Shi Sheng NI (Department of Chemistry, anhui University, hefei 230039)(State Key Laboratory of Coordination Chemistry, Nanjing University, Naning 210093) anhui Univ Dept Chem Hefei 230039 Peoples R China Nanjing Univ State Key Lab Coordinat Chem Nanjing 210093 Peoples R China

A novel Schiff base ligand (HL) derived from S-methyldithiocabazate and pmethoxylbenzaldehyde was prepared and characterized. The Schiff base ligand acts as a single negatively charged bidentate ligand fondng D-M-D type comPlex (D=donor, M=metal). Single crystal X-ray diffraction analysis of the copper(Ⅱ) complex established that the geometry around Cu (Ⅱ) is square-planar with two equivalent M-N and M-S bonds. The two phenyl rings and the coordinated plane are almost in one plane fotheng an electronic delocalization system. Their thirdorder response was also studied.

关键词： copper (Ⅱ) complex third-order nonlinear optical property NS donor ligand

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A NOTE ON COMPLETELY POSITIVE GRAPHS

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Systems Science and Mathematical Sciences 2000年第2期13卷 121-125页

作者： XU Changqing (Department of Mathematics, anhui University, hefei 230039, China) LI Jiongsheng (Department of Mathematics, University of Science and Technology of China, hefei 230026, China) 安徽大学数学系安徽合肥 230039 中国科学技术大学数学系安徽合肥 230026

A necessary and sufficient condition is given for a doubly nonnegative matrix realization of a cycle to be completely positive. Also some special non-CP graphs are investigated.

关键词： Doubly nonnegative matrix completely positive graph cycle factorization.

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Wear Performance of Laser Surface Hardened GCr15 Steel

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Journal of Wuhan University of Technology(Materials Science) 2010年第1期25卷 84-88页

作者：雷声 School of Materials Science and Engineering Hefei University of Technology Department of Electromechanical Engineering Anhui Institute of Architecture and Industry

In order to assess the new tribological properties of laser surface hardened GCr15 steel, the wear resistance between specimens treated with laser and those of conventionally hardened under dry sliding conditions was compared. The change of wear mechanisms in laser hardened GCr15 resulted in a distinct difference in wear rates. The results showed that quenched zones not only had sufficient depth of hardening and higher hardness, but had more retained austenite and finer carbides because of a higher degree of carbide dissolution. Laser surface hardened GCr15 steel specimens exhibited superior wear resistance to their conventionally hardened specimens due to the effects of the microstructure hardening, high hardness and toughness. The wear mechanism for both the laser quenched layer and conventionally hardened layer was highly similar, generally involving adhesive, material transfer, wear-induced oxidation and plowing. When conventionally hardened block specimens rubbed against the laser hardened specimens, the surface of conventionally hardened block specimens was polished. The microstructural thermal stability was increased after laser surface treatment.

关键词： laser hardening dry sliding conditions GCr15 steel wear mechanisms

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