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Research on influence of typical microstructure characteristics of Ni base single crystal on creep rupture and deformation analysis of turbo blade

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航空动力学报 2011年第5期26卷 1148-1158页

作者： CAO Juan wang Yan-rong shi Duo-qi School of Jet Propulsion Beijing University of Aeronautics and Astronautics Beijing 100191 China

Considering the influence of typical microstructure characteristics on creep performance,a series of UM-F single crystal alloys which had similar element components but different microstructures were used to analyze the relationship between creep life and microstructure characteristics of Ni base single *** main factors were proposed:misfit,volume fraction of precipitate and maximum matrix channel *** Microstate parameter Ymicro was established to estimate the deformation state of the *** linear relationship between the initial value of microstate parameter Y0 and creep life under a certain temperature/load was *** analyzing the high temperature region of turbo blade using the material parameters of DD 3,the creep deformation and the life prediction of the critical points of blade were obtained and the result closed to the test.

关键词：《航空动力学报》期刊摘要编辑部

Synthesis and Properties of Novel Luminescent Compounds Containing Triphenylamine and Bipyridine Units

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Chemical Research in Chinese Universities 2012年第2期28卷 313-318页

作者： LU Hai-jun LI Xiang-gao wang shi-rong GAO Wen-zheng wang Sha-sha School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072P.R.China College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018P.R.China

Blue luminescent compounds T1―T4 containing triphenylamine donors,bipyridine acceptors and olefinic linkers were synthesized and characterized by 1 H NMR,13 C NMR and high resolution mass spectrometry（HRMS）.Four compounds T1―T4 exhibit excellent solubility in common solvents and good film forming *** chemical calculations show that compounds T1―T4 have asymmetric linear structures and the proper highest occupied molecular orbital（HOMO） *** UV-Vis absorption and fluorescence emission spectra of the four compounds in dilute chloroform solutions and on the solid films were *** reveals that compounds T1―T4 exhibit similar spectral behavior,suggesting that these compounds can form amorphous state in solid *** calculated absorption and emission spectra of compounds T1―T4 are in good agreement with experimentally determined *** T1―T4 have absolute fluorescence quantum yield above 17% in dilute chloroform *** compounds possess high glass-transition temperature（T g） exceeding 97 ℃ and the maximum T g is 155.28 ℃ for compound *** voltammetry measurements show that these compounds have proper HOMO levels in a range of-5.01―-5.13 eV for hole *** properties of compounds T1―T4 indicate that these compounds are candidates for the application in organic light-emitting devices（OLEDs） as hole-transporting materials（HTMs）.

关键词： Luminescent compound Triphenylamine Bipyridine Hole-transporting material

Synthesis and Crystal Structure of 4,4'-(4-(1-Naphthyl)-4-phenyl-1,3-butadienylidene)-bis[N,N-diethylbenzenamine]

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1063-1066页

作者： LI Xiang-Gao WUAn-Shu XU De-Shun wang shi-rong ZHAO Xue-Ming Fine Chemicals Department School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

The title compound （C40H42N2） has been synthesized by the reaction of l-（l- naphthyl）-l-phenyl-3-chloropropylene and bis（4-（diethylamino） phenyl）methanone, and characterized by IR, ^1H NMR, MS and X-ray diffraction analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 17.047（3）, b = 10.807（2）, c = 18.494（4） A, β = 105.727（4）°, V= 3279.4（11） A^3, Mr = 550.76, Z = 4, Dc = 1.115 g/cm^3,μ（MoKa） = 0.085 mm^-1, F（000） = 1184, the final R = 0.0625 and wR = 0.1384 for 2276 observed reflections （1 〉 2σ（I））. X-ray analysis reveals that the butadiene fragment adopts a planar cisiod conformation and makes a dihedral angel of 69.4（2）° with the naphthalene ring.

关键词： 4,4′-(4-(1-naphthyl)-4-phenyl-1,3-hutadienylidene)bis[N,N-diethyl-benzenamine] synthesis crystal structure

Improved Performance of Fluorinated Copper Phthalocyanine Thin Film Transistors UsingPara-hexaphenyl as the Inducing Layer

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Chinese Physics Letters 2011年第11期28卷 261-263页

作者： MA Feng wang shi-rong LI Xiang-Gao YAN Dong-Hang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072 State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

We demonstrate n-type organic thin film transistors(OTFTs)employing copper hexadecafluorophthalocyanine(CuPcF16)as the active layer and para-hexaphenyl(p-6p)as the inducing *** with the CuPcF16-based OTFTs without the𝑝p-6p inducing layer,the performance of the CuPcF16/𝑝p-6p OTFTs is greatly *** charge carrier field-effect mobilityμ,on-off current ratio𝐼Ⅰon/Ⅰoff and threshold voltage𝑉VT of the CuPcF16/p-6p OTFTs are 0.07 cm^(2)/V・s,1.61×105 and 6.28 V,respectively,approaching the level of a single crystal *** improved performance is attributed to the introduction of𝑝p-6p to form a highly oriented and continuous film of CuPcF16 with the molecularπ–πstack direction parallel to the substrate.

关键词： film approaching phthalocyanine

Primordial black holes and curvature perturbations from false vacuum islands

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Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 58-72页

作者： rong-Gen Cai Yu-shi Hao Shao-Jiang wang School of Physical Science and Technology Ningbo UniversityNingbo 315211China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Asia Pacific Center for Theoretical Physics Pohang 37673Republic of Korea

Recently,much attention has been focused on the false vacuum islands that are flooded by an expanding ocean of true-vacuum bubbles slightly later than most of the other parts of the *** delayed decay regions will accumulate locally larger vacuum energy density by staying in the false vacuum longer than those already transited into the true vacuum.A false vacuum island with thus acquired density contrast of a super-horizon size will evolve locally from radiation dominance to vacuum dominance,creating a local baby Universe that can be regarded effectively as a local closed *** such density contrasts of super-horizon sizes can ever grow large enough to exceed the threshold of gravitational collapse,primordial black holes will form similar to those collapsing curvature perturbations on super-horizon scales induced by small-scale enhancements during *** not,such density contrasts can still induce curvature perturbations potentially observable *** this paper,we revisit and elaborate on the generations of primordial black holes and curvature perturbations from delayed-decayed false vacuum islands during asynchronous first-order phase transitions with fitting formulas convenient for future model-independent studies.

关键词： first-order phase transitions primordial black holes curvature perturbations

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氢氧化镁的表面改性及其在硅橡胶中的阻燃性能研究

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现代化工 2024年第4期44卷 146-151页

作者：马树刚万子岸刘星池王世荣李祥高侯经纬中国石油天然气股份有限公司石油化工研究院北京102206 天津大学化工学院天津300372 天津化学化工协同创新中心天津300372

分别采用乙烯基三乙氧基硅烷(VTES)、乙基三乙氧基硅烷(ETES)以及3-(氨基丙基)三乙氧基硅烷(APTES)对氢氧化镁(MH)进行表面改性,研究了改性工艺对改性MH粒子表面特性的影响。结果表明,确定的最佳改性条件为:改性剂为VTES、改性剂质量分... 详细信息

分别采用乙烯基三乙氧基硅烷(VTES)、乙基三乙氧基硅烷(ETES)以及3-(氨基丙基)三乙氧基硅烷(APTES)对氢氧化镁(MH)进行表面改性,研究了改性工艺对改性MH粒子表面特性的影响。结果表明,确定的最佳改性条件为:改性剂为VTES、改性剂质量分数为8%、反应温度为80℃、搅拌转速为500 r/min、反应时间为2.0 h。将改性MH共混入硅橡胶,当VTES-MH质量分数为50%时,与未添加MH的硅橡胶相比,VTES-MH/硅橡胶复合材料的拉伸强度和断裂伸长率仅分别降低了5%和11%,具有良好的力学性能;极限氧指数为40.2%,具有优良的阻燃性能。

关键词：氢氧化镁阻燃剂改性硅橡胶

Counteracting effects on ENSO induced by ocean chlorophyll interannual variability and tropical instability wave-scale perturbations in the tropical Pacific

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Science China Earth Sciences 2024年第2期67卷 387-404页

作者： rong-Hua ZHANG Feng TIAN Qidong shi Xiujun wang Tongwen WU School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing210044China Laoshan Laboratory Qingdao266237China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao266071China University of Chinese Academy of Sciences Beijing101408China Faculty of Geographical Sciences Beijing Normal UniversityBeijing100875China Earth System Modeling and Prediction Centre China Meteorological AdministrationBeijing100081China

Large perturbations in chlorophyll(Chl)are observed to coexist at interannual and tropical instability wave(TIW)scales in the tropical Pacific;at present,their combined effects on El Ni?o-Southern Oscillation(ENSO)through ocean biologyinduced heating(OBH)feedbacks are not understood ***,a hybrid coupled model(HCM)for the atmosphere and ocean physics-biogeochemistry(AOPB)in the tropical Pacific is adopted to quantify how ENSO can be modulated by Chl perturbations at interannual and TIW scales,individually or collectively,*** HCM-based sensitivity experiments demonstrate a counteracting effect on ENSO:the bio-climate feedback due to large-scale Chl interannual variability acts to damp ENSO through its impact on upper-ocean stratification and vertical mixing,whereas that due to TIW-scale Chl perturbations tends to amplify *** ENSO simulations are sensitively dependent on the ways Chl effects are represented at these different scales,it is necessary to adequately take into account these related differential Chl effects in climate modeling.A bias source for ENSO simulations is illustrated that is related with the Chl effects in the tropical Pacific,adding in a new insight into interactions between the climate system and ocean ecosystem on different scales in the *** results reveal a level of complexity of ENSO modulations resulting from Chl effects at interannual and TIW scales,which are associated with ocean biogeochemical processes and their interactions with physical processes in the tropical Pacific.

关键词： Ocean chlorophyll Bio-climate feedbacks Interannual variability Tropical instability waves Counteracting effects A hybrid coupled model

Enhanced Electrochemical Properties and Optimized Li^(+)Transmission Pathways of PEO/LLZTO-Based Composite Electrolytes Modified by Supramolecular Combination

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Energy & Environmental Materials 2024年第1期7卷 238-246页

作者： Zhengyi Lu Lin Peng Yi rong Enli wang Ruhua shi Hongxun Yang Yadong Xu Ruizhi Yang Chao Jin College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhou 215006China Jiangsu Runchao Energy Storage Technology Co. LtdZhenjiang 212050China

Poly(ethylene oxide)(PEO)and Li_(6.75)La_(3)Zr_(1.75)Ta_(0.25)O_(12)(LLZTO)-based composite polymer electrolytes(CPEs)are considered one of the most promising solid electrolyte ***,agglomeration of LLZTO within PEO and lack of Li^(+)channels result in poor electrochemical ***,a functional supramolecular combination(CD-TFSI)consisting of activeβ-cyclodextrin(CD)supramolecular with self-assembled LiTFSI salt is selected as an interface modifier to coat LLZTO *** from vast H-bonds formed betweenβ-CD and PEO matrix and/or LLZTO,homogeneous dispersion and tight interface contact are ***,^(6)Li NMR spectra confirm a new Li^(+)transmission pathway from PEO matrix to LLZTO ceramic then to PEO matrix in the as-prepared PEO/LLZTO@CD-TFSI CPEs due to the typical cavity structure ofβ-*** a proof,the conductivity is increased from 5.3×10^(-4)S cm^(-1)to 8.7×10^(-4)S cm^(-1)at 60℃,the Li^(+)transference number is enhanced from 0.38 to 0.48,and the electrochemical stability window is extended to 5.1 V versus Li/Li^(+).Li‖LiFePO_(4)CR2032 coin full cells and pouch cells prove the practical application of the as-prepared PEO/LLZTO@CD-TFSI *** work offers a new strategy of interface modifying LLZTO fillers with functional supramolecular combination to optimize PEO/LLZTO CPEs for solid lithium batteries.

关键词： conductivity interfacial stability LLZTO fillers modification PEO matrix

Nondestructive Nonlinear Optical Microscopy Revealed the Blackening Mechanism of Ancient Chinese Jades

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Research 2024年第3期2023卷 391-399页

作者： Yaxin Chen rong wang Minbiao Ji State Key Laboratory of Surface Physics and Department of Physics Human Phenome InstituteAcademy for Engineering and TechnologyKey Laboratory of Micro and Nano Photonic Structures(Ministry of Education)Yiwu Research Institute of Fudan UniversityFudan UniversityShanghai 200433China Department of Cultural Heritage and Museology Fudan UniversityShanghaiChina

Jade is most valued in Chinese culture since ancient times. For unearthed jade artifacts, the alteration color resulting from weathering effects and human activities provides information for cultural heritage conservation, archaeology, and history. Currently, the noninvasive 3-dimensional characterization of jade artifacts with high chemical and spatial resolution remains challenging. In this work, we applied femtosecond pump–probe microscopy and second harmonic generation microscopy techniques to study the black alteration of an ancient jade artifact of the late Spring and Autumn period (546 to 476 BC). The direct cause of the “mercury alteration” phenomena was discovered to be the conversion of metacinnabar from buried cinnabar in the tomb. Furthermore, a 3-dimensional optical reconstruction of the black alteration was achieved, providing a high-resolution method for analyzing the blackening mechanism without the need of sample damage. Our approach opens up new opportunities to extract microscopic spatiochemical information for a broad range of alteration colors in jade artifacts.

关键词： pump Nonlinear buried