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Temporal Aberration of the Focused Inhomogeneous Wave from a Misalignment Parallel Grating Pair Compressor

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Chinese Journal of Lasers 1998年第1期 57-63页

作者： XU Shixiang ZHANG Hua FAN Dianyuan(Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, P.O.Box 800211,Shanghai 201800, China) received Apr. 9 1997 revised manuscript received May 27 1997

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ＴｅｍｐｏｒａｌＡｂｅｒａｔｉｏｎｏｆｔｈｅＦｏｃｕｓｅｄＩｎｈｏｍｏｇｅｎｅｏｕｓＷａｖｅｆｒｏｍａＭｉｓａｌｉｇｎｍｅｎｔＰａｒａｌｅｌＧｒａｔｉｎｇＰａｉｒＣｏｍｐｒｅｓｏｒＸＵＳｈｉｘｉａｎｇＺＨＡＮＧＨｕａＦＡＮＤｉａｎｙｕａｎ（Ｓｈａｎｇ...

关键词： inhomogenous wave parallel grating pair compressor misalignment

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超声调制介质中漫散射光自相关性质研究

物理学报 2001年第10期50卷 1914-1919页

作者：张西芹邢达华南师范大学激光生命科学研究所广州510631

研究了超声调制随机介质中漫散射光自相关性质 ,推导出均匀无限介质中有超声场调制时漫散射光时间自相关函数的表达式 ,讨论了调制参数、调制幅度及其衰减与超声参数、光散射参数等的关系 .用MonteCarlo方法研究了随机介质中隐含异物成... 详细信息

研究了超声调制随机介质中漫散射光自相关性质 ,推导出均匀无限介质中有超声场调制时漫散射光时间自相关函数的表达式 ,讨论了调制参数、调制幅度及其衰减与超声参数、光散射参数等的关系 .用MonteCarlo方法研究了随机介质中隐含异物成像的可行性 .结果表明 ,正常生物组织和病变生物组织的超声调制自相关函数有明显的差别。

关键词：自相关漫散射光超声调制光学成像医学成像

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Ni9钢中的回转奥氏体与低温韧性

金属学报 1984年第6期20卷 405-410页

作者：张弗天王景韫郭蕴宜中国科学院金属研究所

本文研究了经普通热处理与α+γ相区热处理后,Ni9钢组织与-196℃冲击韧性的关系。回转奥氏体的存在提高了低温韧性。经α+γ相区热处理后,回转奥氏体明显增多,且可在马氏体板条间均匀析出。其分布的均匀程度、弥散程度都比普通热处理者... 详细信息

本文研究了经普通热处理与α+γ相区热处理后,Ni9钢组织与-196℃冲击韧性的关系。回转奥氏体的存在提高了低温韧性。经α+γ相区热处理后,回转奥氏体明显增多,且可在马氏体板条间均匀析出。其分布的均匀程度、弥散程度都比普通热处理者为优。回转奥氏体的形态大致有两类:在马氏体板条间析出的为薄片状;在其它界面上析出的为不规则块状。断口观察表明奥氏体确能提高冲击韧性。

关键词：回转奥氏体 Ni9 板条相区马氏体金相相组成回火温度钢中

Saturable Excited State Absorption of Cr4+ : YAG for Q-switching Nd : YAG Laser

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Chinese Journal of Lasers 1997年第3期 2-6页

作者： WAN Xiaoke LIN Lihuang OUYANG Bin DING YanhuaXU Jun DENG Peizhen(Shanghai Institute of Optics & Fine Mechanics, Chinese Academy of Sciences POBox 800211, Shanghai 201800)received Nov 8 1996 revised manuscript received Dec13 1996

ＳａｔｕｒａｂｌｅＥｘｃｉｔｅｄＳｔａｔｅＡｂｓｏｒｐｔｉｏｎｏｆＣｒ４＋ＹＡＧｆｏｒＱ┐ｓｗｉｔｃｈｉｎｇＮｄＹＡＧＬａｓｅｒＷＡＮＸｉａｏｋｅＬＩＮＬｉｈｕａｎｇＯＵＹＡＮＧＢｉｎＤＩＮＧＹａｎｈｕａＸＵＪｕｎ... 详细信息

ＳａｔｕｒａｂｌｅＥｘｃｉｔｅｄＳｔａｔｅＡｂｓｏｒｐｔｉｏｎｏｆＣｒ４＋ＹＡＧｆｏｒＱ┐ｓｗｉｔｃｈｉｎｇＮｄＹＡＧＬａｓｅｒＷＡＮＸｉａｏｋｅＬＩＮＬｉｈｕａｎｇＯＵＹＡＮＧＢｉｎＤＩＮＧＹａｎｈｕａＸＵＪｕｎＤＥＮＧＰｅｉｚｈｅｎ（Ｓｈａｎｇ...

关键词： Cr~4+∶YAG ESA Qswitching

An Investigation of Three-Dimensional Construction Methods in the Micromachining of Silicon Surfaces with an Ultraviolet Laser

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Chinese Journal of Lasers 1998年第5期 56-61页

作者： HE Liming (Department of Mechanical Engineering, Chubu University, Aichi 487-8501, Japan) received March 27, 1998 revised manuscript received June, 22, 1998

１ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｄｅｖｅｌｏｐｍｅｎｔｓｉｎｍｉｃｒｏｏｐｔｉｃｓ，ｍｉｃｒｏｅｌｅｃｔｒｏｎｉｃｓａｎｄｍｉｃｒｏｍｅｃｈａｎｉｃｓｒｅｑｕｉｒｅｎｏｖｅｌａｎｄｕｎｉｑｕｅｐｒｏｄｕｃｔｉ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＲｅｃｅｎｔｄｅｖｅｌｏｐｍｅｎｔｓｉｎｍｉｃｒｏｏｐｔｉｃｓ，ｍｉｃｒｏｅｌｅｃｔｒｏｎｉｃｓａｎｄｍｉｃｒｏｍｅｃｈａｎｉｃｓｒｅｑｕｉｒｅｎｏｖｅｌａｎｄｕｎｉｑｕｅｐｒｏｄｕｃｔｉｏｎｔｅｃｈｎｏｌｏｇｉｅｓｔｏ...

关键词： micromachining ultraviolet laser three dimensional construction

Investigation of the Microstructure of Rolled Semi-Solid Steel

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Journal of Materials Science & Technology 2002年第3期18卷 281-282页

作者： Renbo SONG, Yonglin KANG, Jianlin SUN, Xiongfei YANG, Aimin ZHAO and Weimin MAODepartment of Metal Forming, University of Science and Technology Beijing, Beijing 100083, China [ manuscript received March 15, 2001, in revised form May L5, 2001] Univ Sci & Technol Beijing Dept Met Forming Beijing 100083 Peoples R China

In this paper, spring steel-60Si2Mn and stainless steel-1Cr18Ni9Ti were rolled one pass in the semi-solid state. The microstructural evolution during rolling of the steels with different solid fraction was investigated. The experimental results showed that the manner of liquid and solid phases flowing and deforming was different. During rolling, most of solid phases remained in the center of the rolled specimens, while liquid phase flowed to the edge, which resulted in the macrosegregation of liquid and solid phases. Only the amount of solid fraction reached a certain value, were the solid phases deformed and flattened.

关键词： Spring steel Stainless steel Semi-solid Microstructure

Nanostructure Study of TiO2 Films Prepared by Dip Coating Process

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Journal of Materials Science & Technology 2002年第1期18卷 31-33页

作者： S.M.Attia, Jue WANG, Guangming WU, Jun SHEN and Jianhua MAPohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China [ manuscript received March 30, 2001, in revised form May 31, 2001] Tongji Univ. Shanghai 200092 China

The microstructure properties of the sol-gel derived TiO2 films were studied by the atomic force microscopy (AFM). The films were prepared by dip coating process. The optical properties of the films were explained on ... 详细信息

关键词： Atomic force microscopy TiO2 thin film Sol-gel process

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液相烧结W-Ni-Fe合金中析出相的研究

金属学报 1987年第3期23卷 182-187页

作者：雷秉强朱桂森冶金工业部钢铁研究总院

用金相、X射线衍射相分析和透射电镜观察等手段,细致地考察了含90和95Wt-％w的四种液相烧结W-Ni-Fe合金的微观组织.发现含90wL-％W的合金中,只要有少量的杂质碳存在,在液相烧结后缓冷的条件下将有析出相产生.经鉴定它是A6B6C型碳化物,... 详细信息

用金相、X射线衍射相分析和透射电镜观察等手段,细致地考察了含90和95Wt-％w的四种液相烧结W-Ni-Fe合金的微观组织.发现含90wL-％W的合金中,只要有少量的杂质碳存在,在液相烧结后缓冷的条件下将有析出相产生.经鉴定它是A6B6C型碳化物,其结构属于复杂立方晶系（面心立方晶格）,晶格常数为1.0935nm;化学组成式可近似写成（Ni,Fe）6W 6C;其形貌随着冷却速度大小而变化。通过各种热处理试验,找出了（Ni,Fe）66WC相的形成和消除规律.

关键词： W-Ni-Fe 析出相液相烧结 Ni

Determination of Elastic and Creep Properties of Thin-film Systems from indentation Experiments

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Journal of Materials Science & Technology 2000年第6期16卷 559-567页

作者： Z.F.Yue and G.Eggeler (Institut fur Werkstoffe, Ruhr-Universitat Bochum, 44 801 Bochum, Germany) [manuscript received February 16, 2000, in revised form April 12, 2000] Ruhr Univ Bochum Inst Werkstoffe D-44801 Bochum Germany

Based on the detailed computer simulation of the indentation testing on the thin-film systems, the present paper explores the detailed procedure of determining elastic properties (elastic modulusE^(f) and Poisson ratio v(f)) and creep parameters (CCREEP^(f) and nCREEP^(f)) for a simple Norton law (ε=CCREEP^(f)σ^n CREE^(f), where e is creep strain rate, and a is the stress) material for a thin film coated on a creep substrate, whose elastic properties(E^(s) and v^(s)) and creep properties (CCREEP^(s) and nCREEP^(s)) of the substrate are known, from indentation elastic and creep testing,respectively. The influences of the thickness of the thin-film and the size of the indenter on the indentation behavior have been discussed. It is shown that the boundary between the thin film and the substrate has great influence on the indentation creep behavior. The relative sizes of indentation systems are chosen so that the behavior of the indentation on the film is influenced by the substrate. The two elastic parameters E^(f) and v^(f) of the film are coupled on the influence of the elastic behavior of indentation. With the two different size indenters, the two elastic parameters E^(f) and v^(f) of the film can be uniquely determined by the indentation experimental slopes of depth to applied net section stress results. The procedure of determining of the two Norton law parameters CCREEP^(f) and nCREEP^(f) includes the following steps by the steady indentation rate d. The first step to calculate the creep indentation rate on certain loads of the two different sizes of indenters on a set of assumed values of CCREEP^(f) and nCREEP^(f)Then to build relationship between the creep indentation rate and the assumed CCREEP^(f) and nCREEP^(f) With the experimental creep indentation rate to intersect two sets of which have the same values of d. The last step is to build the CCREEP^(f) and nCREEP^(f)curves from the intersection points for the two indenters. These two curves CCREEP^(f) a

关键词： Thin Determination of Elastic and Creep Properties of Thin-film Systems from indentation Experiments