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MICROALLOYING EFFECT OF BORON ON COPPER-BASE ALLOYS

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Transactions of Nonferrous Metals Society of China 1996年第1期6卷 89-94页

作者： wang jihui Jiang Xiaoxia Li Shizhuo Institute of Metal Research Chinese Academy of SciencesShenyang 110015

The microstructure and properties of boron-modified copper-base alloys were investigated by tension,corrosion,corrosive wear and erosion *** results show that by adding boron in copper-base alloys,the strength and hardness of alloys increase,the plasticity decreases somewhat;the corrosion,corrosive wear and erosion resistance of boron-modified copper-base alloys improve *** microalloying mechanism of boron in copper-base alloys was found.

关键词： boron copper-base alloys microalloying

Progressive Damage Analysis(PDA)of Carbon Fiber Plates with Out-of-Plane Fold under Pressure

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Computer Modeling in Engineering & Sciences 2020年第8期124卷 545-559页

作者： Tao Zhang Jinglan Deng jihui wang Composite Materials and Engineering Laboratory Wuhan University of TechnologyWuhan430070China

The out-of-plane fold is a common defect of composite materials during the manufacturing process and will greatly affect the compressive strength as well as the service *** it of great importance to investigate the influence of out-of-plane defects to the compressive strength of laminate plates of composite materials,and to understand the patterns of defect ***,the strip method is applied in this article to create out-of-plane defects with different aspect ratios in laminated plates of composite materials,and a compressive performance test is conducted to quantify the influence of out-of-plane *** result shows that the compressive strength becomes weaker with a greater aspect *** the highest aspect ratio is set to 0.12 in the experiment,the compressive strength reduces by 36.1%.Then we establish a 3-D progressive damage model based on continuum mechanics,and write it into the UMAT subroutine together with the 3-D Hashin criteria and the non-linear degradation criteria of materials.3-D solid modeling is performed for the samples with an out-of-plane fold based on ABAQUS,and progressive damage analysis is conducted to acquire the inplane evolution process of initial failure strength with different *** experimental results agree well with the simulation results.

关键词： Composite materials out-of-plane fold compressive strength continuum mechanics progressive damage UMAT

Structure and Microtribological Mechanism of Teflon Deposited Film

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Journal of Materials Science & Technology 1999年第1期15卷 17-20页

作者： wang, jihui Lu, Xinchun Wen, Shizhu Li, Hengde wang, Liduo Hong Kong Univ Sci & Technol Dept Elect Engn & Elect Hong Kong Hong Kong

Teflon film was prepared by ion beam enhanced deposition method. The structure and microtribological properties were studied by PH1-5300, FT-IR, XRD and atomic force and friction force microscope (AFM/FFM). The results show that the deposited Teflon is in crystalline state, and its structure is the same as the bulk Teflon. There are two periods in the friction and wear tests for Teflon film. When the load is less than 70 nN, the micro friction is linear with the load, and the Teflon does not have the lubricity. But when the load is greater than 70 nN, the friction force of Teflon film will stay nearly constant, and worn marks will be created in the friction and wear process. The worn depth of Teflon film increases linearly with the load. (Edited author abstract) 10 Refs.

关键词： Polytetrafluoroethylenes

Study on T700/Cyanate/PS/Epoxy Composites with ex-situ Toughening Technique

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Journal of Wuhan University of Technology(Materials Science) 2014年第4期29卷 674-678页

作者：郑亚萍 wang Hao ZHANG Jiaoxia XU Yahong DAI Feng wang jihui Department of Applied Chemistry School of Natural and Applied Science Northwestern Polytechnical University School of Materials Science and Engineering Wuhan University of Technology School of Materials Science and Engineering Jiangsu University of Science and Technology Aerospace Research Institute of Special Materials and Processing Technology

Composites were prepared with polysulfone through ex-situ toughening technique. The dynamic parameters of cyanate/epoxy resin were studied by differential scanning calorimetric（DSC） analysis and dynamic mechanical analysis（DMA）. Microstructual toughening mechanism was studied through scanning electron microscopy（SEM）. The particle microstructure in interlaminar region of composites toughened through ex-situ toughening technique revealed that a reaction induced phase decomposition and phase inversion happened in the interlaminar region. The thermosetting particles were surrounded by the PS phase, which could signifi cantly improve the delamination resistance of composites. The compression after impact（CAI） can be signifi cantly improved from 180 MPa to 260 MPa by using ex-situ toughening while the mechanical properties are not affected.

关键词： composites ex-situ toughening technique phase inversion microstructure

Degradation Mechanism of Lacquered Tinplate in Energy Drink by in-situ EIS and EN

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Journal of Wuhan University of Technology(Materials Science) 2013年第2期28卷 367-372页

作者：周超 wang jihui SONG Shizhe 夏大海 wang Ke SHEN Chen LUO Bing SHI Jiangbo School of Materials Science and Engineering Tianjin University Department of Chemical and Materials Engineering University of Alberta 94277 Unit of the PLA

The corrosion process of phenolic epoxy coated tinplate in energy drink was investigated by in-situ electrochemical impedance spectroscopy（EIS） and electrochemical noise（EN） techniques. The experimental results indicate that the degradation process of novolac epoxy coated tinplate in energy drink can be divided into three main stages： organic coating wetted by the beverage; corrosion initiation beneath the organic coating; and corrosion extension process. It was proposed that the tin coating and carbon steel were mainly corroded by organic acids in energy drink through the pores of the organic coating. After the tin coating was corroded, the carbon steel started to corrode due to its higher electrochemical activity and became to be the dominated corrosion reaction.

关键词： tinplate energy drink electrochemical impedance spectroscopy electrochemical noise corrosion mechanism

MICROSTRUCTURE AND CORROSION BEHAVIOR OF 70Cu-30Ni WELDED PIPE

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中国有色金属学会会刊：英文版 1995年第2期5卷 88-92页

作者： wang,jihui Jiang, Xiaoxia Li,Shizhuo(Institute of Metal Research, Chinese Academy of Sciences,Shengyang 110015) Chinese Acad of Sciences Shengyang China

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关键词： cupronickel alloy welding corrosion behavior

One-pot three-component Mannich reaction catalyzed by sucrose char sulfonic acid

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Frontiers of Chemical Science and Engineering 2009年第2期3卷 201-205页

作者： Qiong XU Zhigao YANG Dulin YIN jihui wang Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research Ministry of EducationInstitute of Fine Catalysis and SynthesisHunan Normal UniversityChangsha 410081China

Sucrose char sulfonic acid efficiently catalyzed the one-pot three-component Mannich reaction of ketones,aromatic aldehydes and amines in ethanol to afford the corresponding β-amino carbonyl compounds in good to excellent yields.A series of heteroaromatic β-amino carbonyl compounds can be obtained when using 2-acetylpyrazine as *** reaction can be performed under mild reaction conditions with clean reaction profiles and a simple workup procedure.

关键词： one-pot synthesis β-amino ketone char sulfonic acid 2-acetylpyrazine catalysis

Quantitative analysis and screening for key genes related to tea saponin in Camellia Oleifera ***

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Food Bioscience 2022年第5期49卷 484-492页

作者： Yana Liu Yangyang Geng Shixin Zhang Bokai Hu jihui wang Jiali He Guizhou Institute of Walnut Guiyang550005China Guizhou Academy of Forestry Guiyang550005China

Tea saponin is an important factor affecting the taste of oil-tea camellia seed *** content of tea saponin varied in different plant parts and different oil-tea camellia *** tea saponin content was the highest in oil-tea camellia seed oil of Liping 2,3.392 mg/mL,and the lowest in that from Changlin 53,1.016 mg/*** increased storage time,the content of tea saponin first increased,peaked at 21 days,and then *** sequencing was performed to identify genes related to Camellia Oleifera tea saponin metabolism.A total of 8107 differentially expressed genes were identified,and these genes were classified into 49 Gene Ontology(GO)functional categories and involved 129 Kyoto Encyclopedia of Genes and Genomes(KEGG)metabolic *** highly correlated with tea saponin metabolism showed significant variation,including ***_c0(annotated as acetyl-CoA C-acetyltransferase,AACT),***_c0(annotated as hydroxymethyl glutaryl-CoA synthase,HMGS),***_c4,***_c0(annotated as hydroxymethyl glutaryl-CoA reductase,HMGR),***_c3(annotated as 1-deoxy-D-xylulose-5-phosphate synthase,DXS),***_c0,***_c1(annotated asβ-amyrin synthase),***_c0,***_c1,***_c1(annotated as cytochrome P450,CYP450),***_c0,***_c1(annotated as UDP-Glycosyltransferase,UGT).This research provides theoretical reference for improved processing and utilization of Camellia Oleifera.

关键词： Camellia oleifera Abel. Storage Tea saponin Quantity variation RNA-Seq

Atmospheric Corrosion Monitoring of Field-exposed Q235B and T91 Steels in Zhoushan Offshore Environment Using Electrochemical Probes

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1433-1440页

作者：夏大海 SONG Shizhe JIN Weixian LI Jian 高志明 wang jihui HU Wenbin School of Materials Science and Engineering Tianjin University Tianjin 300354 China CAS Key Laboratory of Nuclear Materialsand Safety Assessment Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Zhoushan Marine CorrosionInstitute of Central Research Institute of Iron and Steel Zhoushan 316000 China State Key Laboratory of Precision Measurement Technology and lnstrument Tianjin University Tianjin 300072 China

This work aimed to in-situ monitor the atmospheric corrosion of steels exposed to Zhoushan offshore environment by using electrochemical noise（EN） technique. A portable EN monitoring system was established and two electrochemical probes（named as Q235 B and T91） were designed. Experimental results indicated that the noise resistance of T91 steel was higher than that of Q235 B steel, revealing that the corrosion resistance of T91 was higher than that of Q235 B. A 60-day monitoring result indicated that the noise resistance was well correlated with the weight loss data. Wavelet analyses results of EN data indicated that Q235 B underwent uniform corrosion and T91 suffered from localized corrosion, which was further confirmed by the surface observation. It is concluded that EN can be used as a new method to identify the corrosion form and corrosion resistance in atmospheric conditions.

关键词： atmospheric corrosion electrochemical noise corrosion monitoring offshore in field