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Journal of Materials Science & Technology 2022年第18期113卷 229-245页

作者： Bin Wu Hongliang Ming Fanjiang Meng Yifeng Li Guangqing He jianqiu wang En-Hou Han School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shanghai Nuclear Engineering Research and Design Institute Ltd.Co. Shanghai 200233China Instrumental Analysis and Research Center Shanghai UniversityShanghai 200444China Department of Materials Science Fudan UniversityShanghai 200433China Shanghai Electric Nuclear Power Equipment Co. Ltd.Shanghai 201306China

Alloy 690TT tube samples with different scratch depths were repaired by grinding treatments using abra-sive papers of two different particle *** microstructure and stress corrosion cracking(SCC)behavior were studied in *** grinding,the plastic accumulation zone vulnerable to SCC was ***,some residual slip steps remained in the scratched *** tests lasting 1000,2000,3000,and 4000 h show that the sensitivity and risk of SCC in the scratched area are decreased by *** using abrasive particles of a smaller size is more ***,deep scratches remained hazardous even after the grinding.

关键词： Alloy 690TT Scratch Surface Stress corrosion High temperature corrosion Intergranular corrosion

Microstructure, Mechanical Properties and Corrosion Resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) High-Entropy Alloys with Low Thermal Neutron Sections

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Acta Metallurgica Sinica(English Letters) 2024年第10期37卷 1643-1656页

作者： Chao Xiang En-Hou Han Zhiming Zhang Huameng Fu Haifeng Zhang jianqiu wang Guodong Hu Institute of Corrosion Science and Technology Guangzhou510530China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences(CAS)Shenyang110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

High-entropy alloys exhibit significant potential for application in the nuclear industry owing to their exceptional resistance to irradiation,excellent mechanical properties,and corrosion *** this work,the Mo_(0.5)V_(0.5)NbTiZr_(x)(x=0-2.0)high-entropy alloys containing alloying elements with low thermal neutron absorption cross section were designed and *** crystal structure,microstructure,mechanical properties and corrosion resistance of the studied alloys were *** the alloys possess a body-centered cubic crystal structure,which is consistent with the CALPHAD(acronym of CALculation of PHAse Diagram)modeling *** addition of Zr does not alter the crystal structure of the Mo_(0.5)V_(0.5)NbTiZr_(x) alloys;however,it leads to an increase in the lattice constant as Zr content *** addition of Zr initially enhances the yield strength,but subsequently leads to a decline as the Zr content increases ***,the corrosion resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) alloys in superheated steam at 400℃ and 10.3 MPa decreases with the increase of Zr *** effect of Zr content on the phase formation,mechanical properties and corrosion resistance of the Mo_(0.5)V_(0.5)NbTiZr_(x) high-entropy alloys are *** study has successfully developed a novel Mo_(0.5)V_(0.5)NbTiZr_(0.25) high-entropy alloy,which demonstrates exceptional properties including high yield strength,excellent ductility,and superior anti-corrosion *** findings of this research have significant implications for the design of high-entropy alloys in nuclear applications.

关键词： High-entropy alloys Phase formation Mechanical properties Corrosion resistance

Effects of processing additives in non-fullerene organic bulk heterojunction solar cells with efficiency >11%

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Chinese Chemical Letters 2019年第1期30卷 217-221页

作者： Shenkun Xie jianqiu wang Rong wang Dongyang Zhang Huiqiong Zhou Yuan Zhang Defeng Zhou School of Chemistry and Life Science Changchun University of Technology HEEGER Beijing Research & Development Center School of Chemistry Beihang University CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology

Here we investigate processing additive-dependent photovoltaic performance and charge recombination in organic bulk heterojunction(BHJ) solar cells based on a polymeric donor of PBDB-T blended with a non-fullerene acceptor m-ITIC. We find that PBDB-T:m-ITIC solar cells exhibit good compatibilities with the utilized additives(DIO, CN, DPE, and NMP) in optimal conditions, can have a high charge dissociation probability approaching 100%(with DIO), leading to ultimate efficiency >11%. Regardless of additives, we observe a dominant 1 st order monomolecular recombination with insignificant bi-molecular recombination or space-charge effects in these solar cells. Despite of impressive power conversion efficiency(PCE), it is of surprise that Shockley-Read-Hall recombination is identified to play a role in device operation. Thus, it points to the necessity to mitigate the influences of traps to further boost the efficiency in non-fullerene based organic solar cells.

关键词： Organic solar cell Solvent additive Morphology Recombination Non-fullerene

A new method to determine the synergistic effects of area ratio and microstructure on the galvanic corrosion of LAS A508/309 L/308 L SS dissimilar metals weld

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Journal of Materials Science & Technology 2021年第19期78卷 38-50页

作者： Bright O.Okonkwo Hongliang Ming jianqiu wang En-Hou Han Ehsan Rahimi Ali Davoodi Saman Hosseinpour CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials and Metallurgical Engineering Department Faculty of EngineeringFerdowsi University of MashhadMashhad ***Iran Polytechnic Department of Engineering and Architecture University of Udine33100 UdineItaly John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Institute of Particle Technology(LFC) Friedrich-Alexander-Universitdt-Erlangen-Numberg(FAU)91058 ErlangenGermany

The synergistic effects of area ratio and microstructure on the galvanic corrosion of A508/309 L/308 L dissimilar metals weld(DMW)are studied by a multi-analytical *** was demonstrated that decreasing the anode/cathode surface area ratio obviously enhances the corrosion rate of A508,both locally and *** analyses of the AFM results enabled quantitative comparison of the corrosion behaviour of the different surface *** was revealed that in the galvanic interaction of the DMW,the grain refined region corrodes most,followed by the partial grain refined region and base metal matrix of the A508,*** electrochemical localization index(LI)estimation method and AFM analysis both confirmed the presence of a mixed(localized and uniform)corrosion phenomenon occurring on the surface of the A508 anode metal in the galvanic interaction of the dissimilar ***,the degree of synergism equation was utilized to describe the synergistic effects of anode/cathode area ratio and the microstructure of the samples on the galvanic corrosion of LAS A508/309 L/308 L SS DMW.

关键词： Low alloy steel Stainless steel SEM AFM Galvanic corrosion Inclusion

Interaction of Mechanical and Electrochemical Factors duringCorrosion Fatigue of Fe-26Cr-1Mo Stainless Steel in 1M H_2SO_4 Solution

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Journal of Materials Science & Technology 1995年第3期11卷 181-186页

作者： jianqiu wang Jin LI Ziyong ZHU and Wei KE (Corrosion Science Laboratory, Institute of Corrosion and Protection of Metals Chinese Academy of Sciences, Shenyang, 110015, China)Qishan ZANG and Zhongguang wang (State Key Laboratory for Fatigue and Fracture CHINESE ACAD SCI INST MET RESSTATE KEY LAB FATIGUE & FRACTURE MATSHENYANG 110015PEOPLES R CHINA

The cyclic plastic straining electrode technique has been used to investigate the transient electrochemical behaviour of Fe-26Cr1Mo stainless steel in 1M H2SO4 solution at a passive *** influence of plastic strain amplitude and plastic strain rate on the dissolution current response was analysed. The experimental results showed that the transient current was dependent on the competitive process of the surface film rupture and repassivation of the new surface. The high plastic strain amplitude and the high plastic strain rate caused a change of electrochemical activity of specimen surface. In the condition of low strain amplitude and strain rate, the characteristics of current response was mainly relative tp the process of new surface *** competition kinetics has been analysed through the comparison of plastic strain rate and repassivating rate

关键词： Mo Cr Interaction of Mechanical and Electrochemical Factors duringCorrosion Fatigue of Fe-26Cr-1Mo Stainless Steel in 1M H2SO4 Solution Fe SO

Characterization of Corrosion Behavior of Irradiated X65 Low Carbon Steel in Aerobic and Unsaturated Gaomiaozi Bentonite

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Acta Metallurgica Sinica(English Letters) 2019年第4期32卷 506-516页

作者： Canshuai Liu jianqiu wang Zhiming Zhang En-Hou Han Wei Liu Dong Liang Zhongtian Yang Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences University of Chinese Academy of Sciences China Institute for Radiation Protection

2.98 kGy/h(1007 h) gamma irradiation and 90 ℃(2000 h) thermal aging were exerted to X65 grade low carbon steel buried in Gaomiaozi bentonite containing 17 wt% Beishan groundwater. The average corrosion rate of X65 low carbon steel was measured. The elemental and phase distribution on cross section was characterized by using electron probe micro-analysis, high-resolution X-ray diffraction, and micro-X-ray diffraction. The following conclusions can be made: the average aerobic corrosion rate of the carbon steel is(45.16 ± 1.53) μm/year. Taking the original surface as boundary, the corrosion scale is divided into an internal dense product layer(DPL) mainly composed of Fe_3O_4 with segregated FeCO_3 at the corrosion front and an external DPL mainly composed of Fe_3O_4 with segregated α-Fe_2O_3 and bentonite at some ***, S, and Cl are concentrated at the corrosion front of the internal DPL, while Si and Al are concentrated at the external DPL.

关键词： Low carbon steel Corrosion rate Phase distribution Elemental concentration

The value of FinTech innovations for the finance industry:Evidence from China

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Economic and Political Studies 2024年第1期12卷 1-19页

作者： Zhigang Qiu jianqiu wang Ke Wu Sijie Yang School of Finance Renmin University of ChinaBeijingChina School of Finance Capital University of Economics and BusinessBeijingChina

This paper explores the value effects of FinTech innovations on the finance industry in China,focussing on the banking *** use a crawler-like application programme to grab patent filing information and manually identify and classify FinTech innovations based on their application *** patents generally bring adverse value effects to various finance sectors,revealing a competitive relationship between innovators and financial *** innovations applied to insurance and asset management cause the most harm to the industry,especially to state-owned and joint-stock commercial ***,disruptive FinTech innovations by start-up firms appear to pose more potential threats to commercial banks.

关键词： FinTech financial innovations China

Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

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National Science Review 2023年第6期10卷 215-225页

作者： jianqiu wang Zhong Zheng Pengqing Bi Zhihao Chen Yafei wang Xiaoyu Liu Shaoqing Zhang Xiaotao Hao Maojie Zhang Yongfang Li Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductoroptoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University School of Chemistry and Biology Engineering University of Science and Technology Beijing School of Physics State Key Laboratory of Crystal Materials Shandong University University of Chinese Academy of Sciences CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells(OSCs).Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl:BTP-eC9 system and demonstrate the effectiveness in simultaneously decreasing energy disorder and non-radiative voltage *** is found that the introduction of AITC can modify domain size and increase the degree of crystallinity,which enhances open-circuit voltage and power conversion efficiency(19.1%,certified as 18.9%).Inspiringly,an output efficiency of 20.6% of the constructed tandem OSCs based on PBDB-TCl:AITC:BTP-eC9 ternary active layer output a recorded efficiency of 20.6%(certified as 20.3%),which is the highest value in OSCs field to *** work demonstrates that decreasing the voltage losses by ternary strategy and constructing of tandem architecture are effective approaches towards improving photovoltaic performance.

关键词： organic solar cells power conversion efficiency voltage losses tandem cells ternary strategy

Effect of cumulative gamma irradiation on microstructure and corrosion behaviour of X65 low carbon steel

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Journal of Materials Science & Technology 2018年第11期34卷 2131-2139页

作者： Canshuai Liu jianqiu wang Zhiming Zhang En-Hou Han Wei Liu Dong Liang Zhongtian Yang Xingzhong Cao Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Shenyang 110016China China Institute for Radiation Protection Taiyuan 030006ShanxiChina Key Laboratory of Nuclear Analysis Techniques Institute of High Energy PhysicsCAS100049 BeijingChina

X65 low carbon steel was exposed to Co-60 radiation source with 1.25 MeV gamma rays, and cumulatively absorbed gamma irradiation doses（1, 2, and 3 Mgy） were obtained after different exposure time（333, 667, and 1000 h）. The effect of cumulative gamma irradiation on microstructure and corrosion behaviour of the carbon steel in unirradiated aerobic Beishan groundwater at 25℃ was investigated by using positron annihilation, scanning vibrating electrode, and electrochemical techniques. Cumulative gamma irradiation increases vacancy intensity and decreases open circuit potential（OCP） of carbon steel. They indicate that the irradiated carbon steel is activated. Measured current density distribution above the irradiated carbon steel shows that cumulative gamma irradiation accelerates localized corrosion after 0.5 h of immersion. In contrast, the analysis of electrochemical impedance spectroscopy of the irradiated carbon steel indicates that localized corrosion is transformed into general corrosion after 12 h of immersion, which is also accelerated by cumulative gamma irradiation.

关键词： A. Irradiation B. Low carbon steel C. Defects D. Potential E. Corrosion

Characteristics of low-frequency oscillation intensity of airsea turbulent heat fluxes over the northwest Pacific

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Science China Earth Sciences 2009年第8期52卷 1137-1151页

作者： LI Gen, REN BaoHua, ZHENG jianqiu & wang Jun School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China 1. School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China

Based on the daily turbulent heat fluxes and related meteorological variables datasets (1985-2006) from Objectively Analyzed air-sea Fluxes (OAFlux) Project of Woods Hole Oceanographic Institution (WHOI), characteristics of low-frequency oscillation intensity of air-sea turbulent heat fluxes over the northwest Pacific are analyzed by linear perturbation method and correlation analysis. It can be concluded that: 1) the distribution of low-frequency oscillation intensity of latent heat flux (LHF) over the northwest Pacific is mainly affected by that of low-frequency oscillation intensity of anomalous air-sea humidity gradient (Δq′) as well as mean air-sea humidity gradient ( Δ q), while the distribution of low-frequency oscillation intensity of sensible heat flux (SHF) is mainly affected by that of low-frequency oscillation intensity of anomalous air-sea temperature gradient (ΔT′). 2) The low-frequency oscillation of turbulent heat fluxes over the northwest Pacific is the strongest in winter and the weakest in summer. And the seasonal transition of low-frequency oscillation intensity of LHF is jointly influenced by those of low-frequency oscillation intensity of Δq′, low-frequency oscillation intensity of anomalous wind speed (U′), Δ q and mean wind speed (U ), while the seasonal transition of low-frequency oscillation intensity of SHF is mainly influenced by those of low-frequency oscillation intensity of ΔT′ and U . 3) Over the tropical west Pacific and sea areas north of 20°N, the low-frequency oscillation of LHF (SHF) is mainly influenced by atmospheric variables qa′ (Ta′) and U′, indicating an oceanic response to overlying atmospheric forcing. In contrast, over the tropical eastern and central Pacific south of 20°N, qs′ (Ts′) also greatly influences the low-frequency oscillation of LHF (SHF).

关键词： northwest Pacific latent heat flux sensible heat flux low-frequency oscillation