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Two-Dimensional　Collimation　of　an　Atomic　Beam　in　a　Diffuse　Light　Field

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Chinese Journal of Lasers 1995年第6期B4卷 489-494页

作者： LI Foshen CHEN Hongxin CAI Weiquang LIU Liang SHU Wei WANG Yuzhu(Joint Laboratory for Quantum Optics,Shanghai Institute of Optics and Fins Mechanics, Academia SinicaP. O. for 800-211, Shanghai 201800, China)(received 19 Jan. 1995 revised manuscript rece Shanghai Inst of Optics and Fine Mechanics Academia Sinica Shanghai China

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关键词： laser cooling atomic beam collimation

Glass ceramic of high hardness and fracture toughness developed from iron-rich wastes

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Acta Metallurgica Sinica(English Letters) 2009年第3期22卷 181-190页

作者： Weixin HAN Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China manuscript received 27 October 2008 in revised form 17 November 2008 [a]Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A study has been carried out on the feasibility of using high iron content wastes, generated during steel making, as a raw material for the production of glass ceramic. The iron-rich wastes were mixed and melted in different proportions with soda-lime glass cullet and sand. The devitrification of the parent glasses produced from the different mixtures was investigated using differential thermal analysis, X-ray diffraction, and scanning electron microscopy. The mechanical properties of the glass-ceramic were assessed by hardness and indentation fracture toughness measurement. A glass ceramic with mixture of 60 wt pct iron-rich wastes, 25 wt pct sand, and 15 wt pct glass cullet exhibited the best combination of properties, namely, hardness 7.9 CPa and fracture toughness 3.75 MPa·m^1/2, for the sake of containing magnetite in marked dendritic morphology. These new hard glass ceramics are candidate materials for wear resistant tiles and paving for heavy industrial floors.

关键词： Iron-rich wastes Glass ceramics Vitrification Hardness

INFLUENCE OF CARBON CONTENT OF MARTENSITE STEELS ON HARDNESS RE-DISTRIBUTION NEAR WORN SURFACE

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Acta Metallurgica Sinica(English Letters) 2002年第4期15卷 346-352页

作者： Y.P. MaSchool of Metallurgy, Xi’an University of Architecture & Technology, Xi’an 710055, China manuscript received 5 November 2001 in revised form 30 January 2002 School of Metallurgy Xi’an University of Architecture & Technology

After three-body abrasion, the hardness re-distribution near the worn surface has a close relationship with the carbon content of martensite steel. It is considered that there is a competition between the work-hardening and the temper softening, which results from deformation and friction heat of material. When the carbon content of martensite steel is below about 0.6%, the subsurface hardness distribution of material is a softened layer sandwiched between two hardened layers, but above 0.6%C, no softened region appears on the hardness re-distribution curve.

关键词： martensite three-body abrasion hardness re-distribution carbon content

Effects of the Composition of Electrodeposited Fe-Ni-P Alloy on the Thermostability and Magnetic Properties

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Journal of Materials Science & Technology 1997年第2期13卷 137-140页

作者： Chenghui GAO Baiyang ZHOU (Institute for Materials Research, Fuzhou University, Fuzhou 350002, China)(manuscript received February 22, 1996, in revised form June 3, 1996) Institute for Materials Research Fuzhou University Fuzhou 350002 China

The magnetic properties, structure defects of electrodeposited Fe-Ni-P alloys with various compositions and the thermostability at amorphous state have been studied by DSC, positron annihilation and electronic integrating instrument methods. The results show that the thermostability of amorphous Fe-Ni-P alloys increases with Fe content. Emergence and recrystallization of stable phases defer as the P content of the coating increases. The minimum H-c, B-r and P-h occur at 9.4 P (wt pet) content. Maximum H-c, B-r and P-h occur at the weight ratio of Fe to Ni equaling to 1/9.

关键词： Ni Fe Effects of the Composition of Electrodeposited Fe-Ni-P Alloy on the Thermostability and Magnetic Properties

Automatic　Analysis　of　the　Phase　Object　Using　Projection　Moire　Deflectometry

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Chinese Journal of Lasers 1995年第6期B4卷 521-529页

作者： WANG Ming(Basic Department, Nanchang University, Nanchang 330029, China)received 22 March 1995 revised manuscript received 5 June 1995 Nanchang Univ Nanchang China

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ＡｕｔｏｍａｔｉｃＡｎａｌｙｓｉｓｏｆｔｈｅＰｈａｓｅＯｂｊｅｃｔＵｓｉｎｇＰｒｏｊｅｃｔｉｏｎＭｏｉｒｅＤｅｆｌｅｃｔｏｍｅｔｒｙ￥ＷＡＮＧＭｉｎｇ（ＢａｓｉｃＤｅｐａｒｔｍｅｎｔ，ＮａｎｃｈａｎｇＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｃｈａｎｇ３３００２９...

关键词： projection moire deflectometry phase object

Development of Mg-based Hydrogen Storage Alloy

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Journal of Materials Science & Technology 2001年第6期17卷 590-596页

作者： Lian bang WANG, Yijing WANG and Hualang YUAM Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China manuscript received June 30, 2000, in revised form September 20, 20001 Nankai Univ Inst New Energy Mat Chem Tianjin 300071 Peoples R China

Mg-based hydrogen storage alloys are considered as a promising candidate for hydrogen system because of its lightweight, high storage capacity, low price and rich mineral resources. In detail, we reviewed the preparation and properties of Mg-Ni-based hydrogen storage alloys. All kinds of attempts have been done to improve the hydriding and dehydriding behaviors. It is found that the partial substitution of foreign elements can decrease the hydrogen absorption temperature, especially the substitution of a more electronegative element, such as AI and Mn. Mechanical alloying (MA) and mechanical grinding (MG) are the most effective methods to improve the hydriding/dehydriding kinetics and electrochemical capacity, and decrease the desorption temperature. but the corrosion resistance is so poor that the 80% of maximum capacity is lost within ten cycles. Microencapsulation is a useful measurement for improving the corrosion resistance and electrocatalytic activity. fn order to improve the properties of the alloys for practical application, the alloys should have a large number of defects, which give activated sites, subsequently, MA, MG and electroless plating should be used to improve the hydriding/dehydriding kinetics and protect the surface of alloys, respectively. The new composite Mg-based alloys give a new way for the hydrogen storage material to practical application. Furthermore we put forward several problems which will be discussed in future.

关键词： Development of Mg-based Hydrogen Storage Alloy Ni

APPLICABILITY OF THE MASS ACTION LAW IN COMBINATION WITH THE COEXISTENCE THEORY OF METALLIC MELTS INVOLVING COMPOUND TO BINARY METALLIC MELTS

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Acta Metallurgica Sinica(English Letters) 2002年第4期15卷 353-362页

作者： J.ZhangMetallurgical Engineering School, University of Science and Technology Beijing, Beijing 100083, China manuscript received 9 March 2001 in revised form 7 August 2001 Metallurgical Engineering School University of Science and Technology Beijing Beijing 100083 China

Based on the atomicity and molecularity as well as the consistency ofthermodynamic properties and activities of metallic melts with their structures, the coexistencetheory of metallic melts structure involving compound has been suggested. According to this theory,the calculating models of mass action concentrations for different binary metallic melts have beenformulated. The calculated mass action concentrations agree well with corresponding measuredactivities, which confirms that the suggested theory can reflect the structural characteristics ofmetallic melts involving compound and that the mass action law is widely applicable to this kind ofmetallic melts.

关键词： metallic melts activity mass action law coexistence theory

Ectopic pancreaticobiliary drainage accompanied by proximal jejunal adenoma:A case report

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World Journal of Gastroenterology 2009年第35期15卷 4467-4470页

作者： Dong-Sheng Wu,Wei-Xia Chen,Xiao-Peng Wang, Department of Radiology,West China Hospital of Sichuan University,Chengdu 610041,Sichuan Province,China Author contributions:Wu DS and Wang XP collected data and carried out the research Wu DS wrote the manuscript Chen WX revised the article. Department of Radiology West China Hospital of Sichuan University Chengdu 610041 Sichuan Province China. wxchen25@***

A patient with obstructive jaundice was examined by multidetector row helical computed tomography (MDCT)and magnetic resonance imaging(MRI),and his common bile duct was observed to be leading into the distal portion of the horizontal duodenum with a pancreaticobiliary union outside the duodenal wall. A mass was also found in the proximal *** the above findings were confirmed by subsequent surgery,thus contrast-enhanced MDCT and MRI with appropriate image post-processing could provide non- invasive and accurate information regarding anatomy and lesions of the pancreaticobiliary duct and duodenal union,which may improve the feasibility of surgery and reduce postoperative complications.

关键词： Ectopic drainage Pancreaticobiliary malju-nction Computed tomography Magnetic resonanceimaging

The Resonance Peak Theory of Reflection Guidedmode Resonance Filters

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Chinese Journal of Lasers 1999年第4期8卷 26-34页

作者： FU Kexiang WANG Zhiheng ZHANG Qizhi ZHANG Jing NIE Ya (Department of Physics, Sichuan University, Chengdu 610064, China) received Oct. 20, 1998 revised manuscript received Dec. 21, 1998 四川大学物理系四川成都 610064 四川大学物理系四川成都

In this paper, the physical principle of phase grating's resonance is discussed and the basic (approximate) formulae for the resonance is presented. According to the formulae, the properties of resonance peak, including the condition for multi peak and single peak, its relation with grating film thickness, incidence angle, and grating period, is also discussed. The results are consistent with those calculated with rigorous theory. An efficient design method for controlling the single peak resonance wavelength is found.

关键词： resonance filter phase grating total reflection