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Effect of Cooling Start Temperature on Microstructure and Mechanical Properties of X80 High Deformability Pipeline Steel

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Journal of Iron and Steel Research International 2011年第10期18卷 42-46,71页

作者： zheng xiao-fei KANG yong-lin MENG De-liang AN Shou-yong XIA Dian-xiu School of Materials Science and Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China Jinan Iron and Steel Group Corp Jinan 250101 Shandong China

The effect of cooling （laminar cooling） start temperature on the phase constitution was analyzed by quanti- tative metallography. The martensite/austenite （M/A） island distribution was fixed by colour metallography. The strength and uniform elongation of the steels were tested with quasi-static tensile testing machine. The in-coordinate deformation of the soft and hard phases was analyzed using FEM. The results indicate that when the cooling start temperature is 690 ℃, the mechanical properties are the best, meeting the requirements of X80 high deformability pipeline steel.

关键词： high deformability pipeline steel cooling start temperature carbon diffusion in-coordinate deformationsM/A island

Plate tectonics in the twenty-first century

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Science China Earth Sciences 2023年第1期66卷 1-40页

作者： yong-Fei zheng CAS Key Laboratory of Crust-Mantle Materials and Environments Hefei 230026China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China

Plate tectonics was originally established as a kinematic theory of global tectonics,in which the Earth’s rigid outer layer,the lithosphere,consists of different size plates that move relative to each other along divergent,convergent or transform boundaries overlying the ductile *** comprises three elements:rigid lithosphere plates,ductile asthenosphere,and coupled movement *** operates through the interlinked processes of continental drift,seafloor spreading and lithospheric subduction,resulting in the generation,modification and demise of lithospheres throughout geological *** system of lithospheric plates in horizontal and vertical movements forms the spatiotemporal linkages of matter and energy between the surface and interior of Earth,advancing the kinematic theory with a dynamic *** top-down tectonics through lithospheric subduction plays a key role in the operation of plate tectonics,it is balanced for the conservation of both mass and momentum on the spherical Earth by bottom-up tectonics through asthenospheric upwelling to yield seafloor spreading after continental *** gravity-driven subduction of cool lithosphere proceeds through convergence between two plates on one side,and rollback of the subducting slab makes the vacancy for upwelling of the hotter asthenosphere to form active rifting in backarc *** convergence is coupled with plate divergence between two plates along mid-ocean ridges on the other side,inducing passive rifting for seafloor spreading as a remote ***,plate tectonics is recognizable in rock records produced by tectonic processes along divergent and convergent plate *** the asthenospheric upwelling along fossil suture zones may result in continental breakup,seafloor spreading is only induced by gravitational pull of the subducting oceanic slab on the remote ***,the onset and operation of plate tectonics are associated with a series of plate divergent-con

关键词： Continental breakup Seafloor spreading Oceanic subduction Continental collision Lithospheric thinning Asthenospheric upwelling

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铁酸镍纳米粒子的制备与表征

佳木斯大学学报（自然科学版） 2004年第3期22卷 371-373页

作者：陈大茴杨丽珠郑晓咏温州医学院药学院浙江温州325027

　以FeCl3,NiSO4和NaOH制备铁酸镍纳米粒子,探讨了NaOH溶液浓度、pH值、老化时间、老化温度对粒子的影响,通过透射电镜(TEM)、X-射线衍射(XRD)、红外光谱(IR)、化学分析法(EDTA滴定法)对粒子的结构进行表征和研究.结果表明:所得纳米粒... 详细信息

　以FeCl3,NiSO4和NaOH制备铁酸镍纳米粒子,探讨了NaOH溶液浓度、pH值、老化时间、老化温度对粒子的影响,通过透射电镜(TEM)、X-射线衍射(XRD)、红外光谱(IR)、化学分析法(EDTA滴定法)对粒子的结构进行表征和研究.结果表明:所得纳米粒子具有尖晶石结构,有磁性,粒子平均直径约为10nm,形状接近球形.

关键词：铁酸镍纳米粒子

Effects of Chromium Addition on Preparation and Properties of Bulk Cementite

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Journal of Iron and Steel Research International 2016年第8期23卷 842-850页

作者： Bao-chao zheng Zhi-fu HUANG Jian-dong XING Yi-yang xiao xiao FAN yong WANG State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi'an Jiaotong University

Bulk cementites with the Cr contents of 0,3.01,6.03,8.22,and 11.51mass% were prepared by mechanical alloying（MA）and spark plasma sintering（SPS）.The results indicated that when the Cr content was low（3.01mass%）,the phases were composed of cementite with a small amount ofα-Fe at a sintering temperature of 1 173 K,but the microstructure became single-phase alloyed cementite as the Cr content was further *** showed that microaddition of Cr was beneficial for promoting the formation of ***,the mechanical performance of cementite can be greatly affected by the variation of Cr *** hardness,elastic modulus and elastic recovery presented a remarkably increasing tendency with the addition of Cr,and the maximum micro-hardness and elastic modulus values reached 1 070.74 HV and 199.32 GPa,respectively,which were similar to the precipitation phase（cementite）obtained by melting and casting ***,when the Cr content was below 11.51mass%,the crystal structure of Fe3C-type cementite would not change with increasing the Cr content.A Cr atom replaced an Fe atom in the lattice of the cementite,and voids appeared when Cr was doped into the cementite at content of about11.51mass%,causing the relative density to decrease.

关键词： modulus sintering spark hardness alloyed melting remarkably replaced alloying amorphous

食管次全切除回结肠代食管术治疗早中期食管癌疗效分析

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中国实用医刊 2012年第2期39卷 31-33页

作者：路培法孙俊峰王强程学飞郑晓勇孙作永山东省滨州市人民医院胸心外科 256610

目的探讨食管次全切除回结肠代食管颈部吻合术治疗早中期食管癌的临床经验及远期疗效。方法回顾性分析1991年至2009年间151例早中期食管癌患者的临床资料，所有患者均行食管次全切除回结肠代食管经胸骨后路颈部吻合术。术后TNM分期，Ⅰ... 详细信息

目的探讨食管次全切除回结肠代食管颈部吻合术治疗早中期食管癌的临床经验及远期疗效。方法回顾性分析1991年至2009年间151例早中期食管癌患者的临床资料，所有患者均行食管次全切除回结肠代食管经胸骨后路颈部吻合术。术后TNM分期，Ⅰ期39例，Ⅱa期86例，Ⅱb期26例。其中上胸段13例，中胸段95例，下胸段43例。结果术后颈部吻合口瘘9例（6．0％），喉返神经损伤7例（4．6％），颈部吻合口狨窄11例（7．3％），肺部感染5例（3．3％），死亡3例（2．0％）。总并发症发生率为23．2％。135例获随访1—15年，术后3、5、10年生存率分别为79．5％、46．3％、26．7％。患者术后均恢复日常饮食习惯，生活质量满意，能从事一般工作及体力劳动。结论食管次全切除回结肠代食管经胸骨后路颈部吻合术治疗早、中期食管癌可明显提高患者的远期生存率和术后生活质量，提高外科技术，可显著降低结肠代食管术的并发症发生率。

关键词：食管肿瘤食管次全切除回结肠代食管结肠血管

Redox-active humics support interspecies syntrophy and shift microbial community

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Science China(Technological Sciences) 2019年第10期62卷 1695-1702页

作者： zheng Yue KAPPLER Andreas xiao yong YANG Fan MAHADEVA Gurumurthy Dummi ZHAO Feng CAS Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen361021China University of Chinese Academy of Sciences Beijing100049China Geomicrobiology Center for Applied GeosciencesUniversity of TuebingenTuebingen72076Germany

The network of microbial electron transfer can establish a syntrophic association of microbes by connecting interspecies metabolisms, and a variety of redox-active shuttles in environment have been proved to accelerate the electron flow in a microbial community. Using humic substances as models, we investigated how different redox-active shuttles with different electrochemical properties influence interspecies electron transfer, and affect the shift of microbial communities. The co-culture of two species was constructed with supplements of humics, and the electron transfer between these two strains was found to be linked by humic acid with a wider window of redox potential and multi-peaks of redox reactions. Based on the shift of microbial composition, the humic substances with a wide potential window and multi-peaks of redox reactions for accepting and donating electrons could increase the biodiversity(Chao 1 and phylogenetic diversity) with a large extent. The mechanism by which redox-active shuttles mediate the microbial electron transfer network could facilitate our understanding of syntrophic interactions between microbes.

关键词： humic acid fulvic acid redox-active shuttle microbial diversity interspecies electron transfer

Simultaneous removal of ethyl acetate, benzene and toluene with gliding arc gas discharge

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第5期9卷 695-701页

作者： zheng BO Jian-hua YAN xiao-dong LI yong CHI Ke-fa CEN State Key Laboratory of Clean Energy Utilization Institute for Thermal Power Engineering Zhejiang University Hangzhou 310027 China

The simultaneous removal of ethyl acetate, benzene and toluene with relatively low or high initial concentration is studied using a laboratory scale gliding arc gas discharge (GA) reactor. Good decomposition efficiencies are obtained which proves that the GA is effective for the treatment of volatile organic compounds (VOCs) with either low or high concentration. A theoretical decomposition mechanism is proposed based on detection of the species in the plasma region and analysis of the decomposition by-products. This preliminary investigation reveals that the GA has potential to be applied to the treatment of exhaust air during color printing and coating works, by either direct removal or combination with activated carbon adsorption/desorption process.

关键词： Plasma Gliding arc gas discharge (GA) Volatile organic compounds (VOCs) Simultaneous removal Printing and coating process

Synthesis and Crystal Structure of N-[4-(4-Methyl-phenylsulfamoyl)-phenyl]- 4-methyl-1,2,3-thiadiazole-5-carboxamide

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Chinese Journal of Structural Chemistry 2007年第5期26卷 501-504页

作者： WANG Jian-Guo xiao yong-Jun Li zheng-Ming SONG Hai-Bin （Elemento-organic Chemistry hlstitute State Key Laboratory ofElemento-organic Chemistry Nankai University Tianjin 300071 China

The crystal structure of the title compound （C17H16N4O3S2, Mr = 388.46） has been determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/c with a = 13.688（2）, b = 16.704（3）, c = 8.3308（12）A, β = 99.474（6）°, V = 1878.8（5） A^3, Mr = 388.46, Z = 4, Dc = 1.373 g/cm3, μ = 0.308 mm^–1, F（000） = 808, R = 0.0389 and wR = 0.0917. X-ray analysis reveals that the crystal structure involves intermolecular N–H…O and N–H…N hydrogen bonds, which link the molecules into a layer parallel to the ac plane.

关键词： X-ray diffraction crystal structure synthesis

Imaging and Characteristics of a Bimaterial Microcantilever FPA Fabricated using Bulk Silicon Processes

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Chinese Physics Letters 2012年第5期29卷 240-243页

作者： ZHAO An-Di zheng yong-Jun YU xiao-Mei School of Electronic and Information Engineering Beijing Institute of TechnologyBeijing 100081 National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking UniversityBeijing 100871

For a focal plane array (FPA ) fabricated with a surface sacrificial layer process,the IR flux must transmit through the silicon substrate and the air gap before it reaches the cantilever *** of the IR radiation energy is therefore lost owing to the reflection and absorption caused by the silicon *** fabricate an infrared FPA consisting of 128 × 128 microcantilever pixels by using a novel bulk micro-electro-mechanical-system *** images of persons at room temperature are captured to demonstrate the IR imaging capability of the *** the proposed device,the thermal response is calculated to be 4.03 × 10^(-3),the thermo-mechanical sensitivity is measured to be 0.273μm/K,the noise equivalent temperature difference is measured to be 200mK by a gray level change method and the time constant is calculated to be 15ns under a 10mTorr pressure.

关键词： cantilever Bulk noise