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Microstructure of a Mo-Si-C-N multi-layered anti-oxidation coating on carbon/carbon composites by fused slurry

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Rare Metals 2009年第5期28卷 460-464页

作者： LAI Zhonghong MENG Songhe ZHU Jingchuan JEON Jaeho School of Materials science and Engineering Harbin Institute of Technology Harbin 150001 China Research center for Composite Materials Harbin Institute of Technology Harbin 150001 China Department of Materials technology Korea Institute of Machinery ＆ Materials Changwon 641-010 Korea

A Mo-Si-C-N multi-layered anti-oxidation coating was in-situ fabricated by introducing nitrogen atmosphere during the fused sintering of Mo-Si slurry pre-layer on carbon/carbon composites. The phase composition and microstructure of the Mo-Si-C-N coating were characterized by X-ray diffractometry, optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The Mo-Si-C-N coating exhibited a three-layered structure. Besides the MoSi2/Si main-layer and the SiC bonding-layer, a surface layer of about 10 μm in thickness was synthesized on the coating surface. The surface layer mainly consisted of SiC nanowires and contained some Si3.4 and Si phases. SiC nanowires of 10 to 200 nm in diameter presented a terrace and distortion structure. Transmission electron microscopy indicated that the SiC nanowires grew along the preferred 〈111〉 direction. During oxidation test, SiC nanowires transmuted into SiO2 glass, which can play an important role in improving the oxidation resistance of C/C composites.

关键词： C/C composites coating microstructures anti-oxidation

HIGHLY EFFECTIVE AND SELECTIVE ISOMERIZATION OF 4-VINYL-CYCLOHEXENE CATALYZED BY TITANOCENE COMPLEXES

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Chinese Journal of Catalysis 1999年第4期 6-7页

作者： Qian Yanlong, Mohammed Abu Saleque, Cai Liangzhen,Hong Kunlun* *, L Jiaqi* * * (Laboratory of Organometallic Chemistry, East china university of science and {3., Shanghai 20023.)

Ｔｈｅｃａｔａｌｙｔｉｃｓｐｅｃｉｅｓ［Ｃｐ２ＴｉＨ］，ｆｏｒｍｅｄｉｎｓｉｔｕｆｒｏｍｔｈｅｒｅａｃｔｉｏｎｏｆｔｉｔａｎｏｃｅｎｅｄｉｃｈｌｏｒｉｄｅｗｉｔｈＧｒｉｇｎａｒｄｒｅａｇｅｎｔｓｈａｖｉｎｇａβＨ，... 详细信息

Ｔｈｅｃａｔａｌｙｔｉｃｓｐｅｃｉｅｓ［Ｃｐ２ＴｉＨ］，ｆｏｒｍｅｄｉｎｓｉｔｕｆｒｏｍｔｈｅｒｅａｃｔｉｏｎｏｆｔｉｔａｎｏｃｅｎｅｄｉｃｈｌｏｒｉｄｅｗｉｔｈＧｒｉｇｎａｒｄｒｅａｇｅｎｔｓｈａｖｉｎｇａβＨ，ｗａｓｆｏｕｎｄｔｏｂｅａｖｅｒｙ...

关键词： isomerization 4vinylcyclohexene titanocene complex

Molecular hosts for triplet emitters in organic light-emitting diodes and the corresponding working principle

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science china Chemistry 2010年第8期53卷 1679-1694页

作者： MI BaoXiu1,2,GAO ZhiQiang1,LIAO ZhangJin2,HUANG Wei2 & CHEN Chin Hsin3.1Jiangsu Engineering center for Flat-Panel Displays & Solid-State Lighting School of Materials science & Engineering,Nanjing university of Posts & Telecommunications,Nanjing 210046,{3. 2Key Laboratory for Organic Electronics & Information Displays (KLOEID),Institute of Advanced Materials (IAM),Nanjing university of Posts & Telecommunications,Nanjing 210046,{3. 3.isplay Institute,Microelectronics and Information Systems Research center,National Chiao Tung university Hsinchu,Hsinchu,3.0 {3. Jiangsu Engineering center for Flat-Panel Displays & Solid-State Lighting School of Materials science & Engineering Nanjing University of Posts & Telecommunications Nanjing China Key Laboratory for Organic Electronics & Information Displays (KLOEID) Institute of Advanced Materials (IAM) Nanjing University of Posts & Telecommunications Nanjing China Display Institute Microelectronics and Information Systems Research Center National Chiao Tung University Hsinchu Hsinchu China

This paper summarizes the mechanism and routes for excitation of triplet emitters in dopant emission based phosphorescent organic light-emitting diodes (PhOLEDs),providing a comprehensive overview of recent progress in molecular hosts for triplet emitters in ***,based on the nature of different hosts,e.g.,hole transporting,electron transporting or bipolar materials,in which the dopant emitters can be hosted to generate phosphorescence,the respective device performances are summarized and *** are given to the relationships among the molecular structure,thermal stability,triplet energy,carrier mobility,molecular orbital energy level and their corresponding device performances.

关键词： phosphorescent organic light-emitting diodes (OLEDs) working principle electrophosphorescence hosts triplet emitter

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树状河网非恒定流的一则并行直接数值解法

系统仿真学报 2004年第12期16卷 2673-2676,2679页

作者：张国义房明惠黄刘生陈国良中国科学技术大学计算机科学与技术系国家高性能计算中心安徽合肥230027 中国科学技术大学地球与空间科学学院

描述了求解树状河网非恒定流问题的一则并行直接数值解法。该方法首先利用区域分解方法将河网划分成p个子块,然后利用串行双消除算法所隐含的自然并行性,以及树状河网支流交汇点水流连续方程组系数矩阵的特点,将计算任务分配到p个处理... 详细信息

描述了求解树状河网非恒定流问题的一则并行直接数值解法。该方法首先利用区域分解方法将河网划分成p个子块,然后利用串行双消除算法所隐含的自然并行性,以及树状河网支流交汇点水流连续方程组系数矩阵的特点,将计算任务分配到p个处理器进行多级直接数值求解。在曙光2000并行计算机上用消息传递方式实现了该算法并进行了性能测试,结果表明算法的数值稳定性好,并行效率可以达到90%以上。

关键词：树状河网圣维南方程组稀疏直接法区域分解并行算法

Microwave Irradiation Treatment of Wood Flour and Its Application in PVC-Wood Flour Composites

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Journal of Wuhan university of technology(Materials science) 2007年第1期22卷 148-152页

作者：胡圣飞陈文 Institute of Materials science and Engineering Wuhan University of Technology School of Chemical and Environmental Engineering Hubei University of Technology Wuhan 430068China

The technique of microwave irradiation induced free radical bulk- polyaddition reactions in porous wood flour was used to modify wood flour. The behaviors of the modified wood flour under microwave irradiation, such as thermal stability and moisture sorption properties, were studied. A kind of semiinterpenetrating polymer network wood four （Semi-IPN-WF） can be formed through polymerization of MMA in the porous wood flour by microwave irradiation, and the thermal decomposition temperature of the semi-IPN-WF is considerably increased. PVC/Semi-IPN-WF composites were prepared by melt mixing in double rolls, which exhibit improved rheological properties, lower water sorption properties and outstanding mechanical performances.

关键词： microwave irradiation wood flour poly(vinyl chloride) composites

Distribution and its mechanism of suspended particulate matters in the southern Huanghai Sea and the East china Sea in summer

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Acta Oceanologica Sinica 2011年第5期30卷 94-100页

作者： QIAO Lulu LIU Yong CHEN Jiaojie MA Yanyan LI Guangxue SONG Jun Key Laboratory of Seafloor science and Exploration technology Ocean University of China Qingdao 266100 China College of Marine Geosciences Ocean University of China Qingdao 266100 China National Marine Data and Information Service State Oceanic Administration Tianjin 300171 China

Water temperature,turbidity,chlorophyll-a and suspended sediment concentration （SSC） were investigated at 61 stations of eight sections in the southern Huanghai Sea （HS） and the East china Sea （ECS） during the summer （28 June to 15 July） of *** horizontal distribution of suspended parti culate matter （SPM） displayed a high concentration inshore and a low value *** maximum value can reach 10.4 mg/dm 3.which can be found at the Changjiang River *** the same site,the SSC was generally higher at the bottom than on the *** the vertical direction,distribution characteristics of turbidity can be divided into two types：in the southern HS high values at the bottom while low values on the surface,and in the ECS high values inshore with low values *** thermocline in the HS and the Taiwan Warm Current in the ECS could be important factors preventing the SPM from diffusing upward and *** the typhoon Ewiniar was not able to work on the major sediment transport under the thermocline during the observation.

关键词： turbidity suspended particulate matter summer thermocline warm current

The mechanism of breakdown in laminar-turbulent transition of a supersonic boundary layer on a flat plate-temporal mode

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science china(Physics,Mechanics & Astronomy) 2005年第5期48卷 614-625页

作者： HUANG Zhangfeng 1, CAO Wei 1,2 & ZHOU Heng 1,2 1. Department of Mechanics, Tianjin university, Tianjin 3.0072, china 2. Liu-Hui center of Applied Mathematics, Nankai university and Tianjin university, Tianjin 3.0072, china Department of Mechanics Tianjin University Tianjin China Liu-Hui center of Applied Mathematics Nankai University and Tianjin University Tianjin China

Temporal mode direction numerical simulation has been done for the transition of a supersonic boundary layer on a flat plate with Mach number 4.5. Analysis of the result showed that during the breakdown process in laminar-turbulent transition, the mechanism causing the mean flow profile to evolve swiftly from laminar to turbulent was that the modification of mean flow profile by the disturbances,when they became larger,led to a remarkable change of its stability characteristics. Though the most unstable T-S wave was of second mode for laminar flow, the first mode waves played the key role in the breakdown process in laminar-turbulent transition.

关键词： supersonic boundary layer, transition, breakdown.

Control of neotectonic movement on hydrocarbon accumulation in the Kuqa Foreland Basin,west china

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Petroleum science 2010年第1期7卷 49-58页

作者： Jiang Zhenxue Li Lianxia Song Yan Tian Fenghua Zhao Mengjun Wang Haijiang Zhao Zhenxing State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Beijing 102249 China Basin and Reservoir Research center China University of Petroleum Beijing 102249 China Exploration and Development Research Institute PetroChina Beijing 100083 China Department of Exploration ＆ Development PetroChina CBM Limited Company Beijing 100013 China Exploration Department Tarim Oilfield Company PetroChina Kuerle Xinjiang 841000 China No.8 Oil Production Plant Changqing Oilfield Company PetroChina Xi＇an Shaanxi 710018 China

Neotectonic movement refers to the tectonic movement that has happened since the Cenozoic, which is the latest movement. It has the most important influence on the basins in west china, especially on the hydrocarbon accumulation in the western foreland basins. We determined the time of neotectonic movement in the Kuqa Foreland Basin, which began from the Neogene, and analyzed the patterns of movement, which were continuous and fast subsidence in the vertical direction and intense lateral compression. The structure styles are that the faulting is weakened and the folding is strengthened gradually from north to south. We studied the control of neotectonic movement on the hydrocarbon accumulation process and model in the Kuqa Foreland Basin with basin simulation technique. The largest subsidence rate of the Kuqa Foreland Basin reached 1,200 m/Ma during the neotectonic movement, leading to rapid maturing of source rock within 5 Ma and a large quantity of hydrocarbon being generated and expelled. The thick neotectonic strata can form high quality reservoirs with the proved gas and oil reserves accounting for 5% and 27% of the total reserves, respectively. 86% of the structural traps were formed in the neotectonic movement period. The faults formed during the neotectonic movement serve as important migration pathways and they exist in the region where the hydrocarbon reservoirs are distributed. Abnormally high pressure caused by the intense lateral compression, thick neotectonic strata deposition and rapid hydrocarbon generation provide driving force for hydrocarbon migration. The accumulation elements match each other well over a short period, leading to many large gas fields formed later in the Kuqa Foreland Basin.

关键词： Kuqa Foreland Basin neotectonic movement accumulation element accumulation process accumulation model

Campus Sewage Treatment System Based on Program Logic Control technology

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Campus Sewage Treatment System Based on Program Logic Contro...