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Corrosion Resistance of Single Layer and Multilayer TaN Coatings

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稀有金属材料与工程 2011年第S4期40卷 203-205页

作者： Sun Gang1,Ma Guojia1,2,Liu Xing2,Zhang Lin2 1Beijing Aeronautical Manufacturing technology Research Institute,Beijing 100024,china2dalian university of technology,dalian 116024,china Beijing Aeronaut Mfg Technol Res Inst Beijing 100024 Peoples R China dalian Univ Technol Dalian 116024 Peoples R China

In this study,the TaN single and multilayer coatings were deposited on Cr12MoV steel substrates by magnetron sputtering *** phase structure,chemical composition,and morphology of coatings were observed utilizing X-ray diffraction 、atom force microscope and scanning electron *** corrosion behaviors of the coatings were studied in aerated 3.5wt.% NaCl aqueous solutions by interpretation of the electrochemical anodic polarization *** results showed that the single TaN coatings were deteriorated than TaN multilayer *** the effect that the multilayer coating can make some porous in the coatings closed,the structure and morphology are also important reasons which cause the different corrosion resistance ability between them.

关键词： TaN multilayer coatings corrosion behaviors

An Analysis of Reliability and Competitiveness of a Corporation in china

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Systems Science and Systems Engineering 1996年第2期6卷 129-136页

作者： FAN Jin(Yangzhou university, Yangrhou 225009, china)ZHANG Jiewei(dalian university of technology, dalian 116024, china)SHEN Ji(Yangzhou university, YangZhou 225009, Chian)

This paper, by using the theory of reliability, studies operating of a corporation in china. Firstly, the paper clarifies new characteristics of a corporation in china. Secondly, the paper analyses three kinds of systems that include series connection model, parellel connection model and mixed connection model. In the end, the paper studies four kinds of corporations and makes a forecast that are market-oriented corporation, innovation-oriented market, scale-oriented market and power-oriented market in china.

关键词： reliability corporation series connection parellel connection mixed connection market-oriented innovation-oriented scale-oriented power-oriented.

Simulation of the Influence of Surface Wettability on Viscous Fingering Phenomenon in Porous Media

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Journal of Bionic Engineering 2010年第3期7卷 267-275页

作者： B. Dong~1, Y. Y. Yan~2, W. Z. Li~1, Y. C. Song~1 1. Key Laboratory of Ocean Energy Utilization and Energy Conservation (Ministry of Education, china), dalian university of technology, dalian 116024, P. R. china 2. Faculty of Engineering, university of Nottingham, university Park, NG7 2RD, UK [a] Key Laboratory of Ocean Energy Utilization Energy Conservation (Ministry of Education China) Dalian University of Technology Dalian 116024 P. R. China [b] Faculty of Engineering University of Nottingham University Park NG7 2RD UK

Fingering phenomena are common occurrence in the natural world. It generally takes place when a less viscous fluid displacesa more viscous fluid typically in porous media. Nowadays, such phenomena have extensively been studied due to itsimportance in many industrial fields. In this paper, the effects of surface wettability on finger pattern are studied and simulatednumerically by the Lattice Boltzmann method (LBM). The displacement efficiency is investigated by using two parameters,namely, the breakthrough time and the areal sweep efficiency. The simulation has demonstrated that surface wettability willinfluence the finger pattern no matter the gravity is considered or not, but in the presence of gravity, the finger pattern is muchmore complicated and irregular due to the coexistence and competition of capillary force, viscous force and gravity.

关键词： immiscible fluids porous media viscous fingering wettability

Phase selection during solidification of undercooled Ni70.2Si29.8 eutectic alloy

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Progress in Natural Science:Materials International 2009年第11期19卷 1619-1624页

作者： Yiping Lu~a,Tingju Li~(a,*),Fu Yabo~a,Sun Jianbo~(a,b),Luo Dawei~a,Gencang Yang~c, Yaohe Zhou~c a Laboratory of Special Processing of Raw Materials,Key Lab of Materials Modification by Laser,Electron and Ion Beams,Ministry of Education of china, dalian university of technology,dalian 116024,china b School of Materials Science and Engineering,Jiamusi university,Jiamusi 154007,china c State Key Laboratory of Solidification Processing,Northwestern Polytechnical university,Xi’an 710072,china [a]Laboratory of Special Processing of Raw Materials Key Lab of Materials Modification by Laser Electron and Ion Beams Ministry of Education of China Dalian University of Technology Dalian 116024 China [b]School of Materials Science and Engineering Jiamusi University Jiamusi 154007 China [c]State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi&#x2019 an 710072 China

High undercooling(about 392 K) was achieved in the bulk eutectic Ni70.2Si29.8alloy melt through glass fluxing combined with cyclic *** is found that the metastable phases Ni3Si2and NiSi are obtained through slow post-solidification when undercooling exceeds 240 *** metastable phases are confirmed by using the method of X-ray diffraction and differential scanning calorimetry (DSC).Based on the principle of the free energy minimum and the transient nucleation theory,the phase selection of melt is investigated with regard to the metastable phases formation in the bulk undercooled eutectic *** formation of metastable phases from undercooled Ni70.2Si29.8melts is ascribed to competitive nucleation with the undercooling,*** undercooling facilitates the preferential nucleation of metastable phases.

关键词： Undercooling Eutectic alloy Metastable phase Nucleation

INFLUENCE OF GRAIN SHAPE AND CARBIDE ON CREEP CRACK GROWTH IN HK40

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Acta Metallurgica Sinica(English Letters) 1990年第6期3卷 449-452页

作者： ZHU Shijie Institute of Metal Research,Academia Sinica,Shenyang,china ZHAO Jie Fushun Institute of Petrochemistry,Fushun,china WANG Fugang dalian university of technology,dalian,china Institute of Metal Research,Academia Sinica,Shenyang 110015

The influence of two different grain shapes and carbides in the HK40 alloy,the material for use of furnace tube,on the rate of creep crack growth has been *** resistance to creep crack growth of the material with columnar grains is inferior than that with equiaxial grains when the load line is perpendicular to the columnar grain *** influence of secon- dary carbide on the rate of creep crack propagation depends upon the Brain shape.

关键词： grain shape creep rate crack propagation

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固体力学中的Hamilton正则表示

力学学报 1996年第1期28卷 119-125页

作者：郑宇张鸿庆华东师范大学数学系大连理工大学数学系

主要给出一系列关于固体力学中偏微分方程（组）的Ｈａｍｉｌｔｏｎ正则表示．其中包括２，４，６阶线性对称偏微分方程、柱壳问题及弹性力学中混合动力问题等的Ｈａｍｉｌｔｏｎ正则表示．

关键词：哈密尔顿系统柱壳问题固体力学

LASER PLASMA ASSISTED CHEMICAL VAPOR DEPOSITIONOF SILICON NITRIDE ON STAINLESS STEEL

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Acta Metallurgica Sinica(English Letters) 1999年第5期12卷 816-820页

作者： Z.Y. Lu 1) , S.M.An 2) , B.H.Cuo 2) , W.M.Li 1) , Y.Mei, Y.L.Xia 2) and J.Xu 2) 1) Department of Mechanical Engineering, Yangzhou university, Yangzhou 225009, china 2) dalian university of technology, dalian 116024, china

This study raised a new assisted technique used for chemical vapor deposition (CVD) in which a laser beam irradiated the surface of substrate and simultaneously the plasma surroundings created in the reactive room, but both laser and plasma were at lower energy level in order to perform easily. The chemical vapor deposition reaction could be performed only just using simultaneously above two assisted methods. If not, the reaction could not be performed, too. It is laser plasma assisted chemical vapor deposition (LPCVD). For these reasons, a LPCVD device had been designed and manufactured, and was carried on practical operation. The results indicated that this technique is successful and feasible. Acting on the system of SiH 4 NH 3 N 2 with both CO 2 laser and RF plasma, expectant film of silicon nitride had been obtained on the surface of stainless steel.

关键词： CVD laser plasma silicon nitride fil

Charge-Based Low Priority Congestion Control

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Charge-Based Low Priority Congestion Control

2008 11th IEEE International Conference on Communication technology(ICCT2008)

作者： Chi WANG Hongbo Wang Yu Lin and Shanzhi Chen Chunguang Wu State Key laboratory of Networking and Switching technology Beijing university of Posts and Telecommunications Beijing 100876 china dalian university of technology dalian 116024 Liaoning china

With the best-effort TCP transporting foreground traffic,below-best-effort transport protocols are developed to transport background ***,we argue in this paper that:1) two fixed levels of priority are not enough,and 2) the background and foreground transfers are subjective concepts which can only be decided by users but not arbitrarily determined by the network according to the application type of the *** we propose the charge-based low priority congestion control（TCP-CBLP）,an algorithm not only provide multiple flexible priority levels lower than best-effort TCP,but also helps users allocating their available bandwidths effectively to optimize their *** results show that the algorithm is fair,stable,and can optimize users’ utilities.

关键词： congestion control low priority congestion pricing background traffic utility function

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轻质预应力混凝土平台罐体的温度场试验研究

土木工程学报 2004年第4期37卷 19-22页

作者：宋小软宋玉普石战国北方工业大学建筑学院大连理工大学土建学院焦作大学建筑工程系

通过大比例模型试验 ,对轻质预应力混凝土平台罐体温度场的分布规律和罐壁中空气夹层的保温效果进行了研究 ,证明空气隔热层的良好保温效果 ,并根据试验分析结果 ,为实际工程应用提出建议 ;建立有限元模型 ,对罐体温度场进行理论分析 ,... 详细信息

通过大比例模型试验 ,对轻质预应力混凝土平台罐体温度场的分布规律和罐壁中空气夹层的保温效果进行了研究 ,证明空气隔热层的良好保温效果 ,并根据试验分析结果 ,为实际工程应用提出建议 ;建立有限元模型 ,对罐体温度场进行理论分析 ,其计算结果与试验结果符合较好 ,证明分析方法是可靠的。研究成果为这种新型平台的设计和将来的使用提供试验和理论依据。

关键词：预应力混凝土平台温度场模型试验有限元分析