材料期刊网

PHASE DIAGRAMS OF KF-LiCI-BaCl_2 AND LiF-LiCI-BaCl_2 SYSTEMS

YAN Licheng YANG Jinxiu ZHU Lei , XU Jingyan Shanghai University of Science andTechnology , Shanghai , ChinaFAN Jinxia Suzhou Teachers′ School , Suzhou , China YAN Licheng , Associate Professor , Dept.of Chemistry , Shanghai University of Science and Technology , Shanghai 201800 , China

金属学报(英文版)

The phase diagrams of molten salt systems KF-LiCI-BaCl_2 and LiCI-LiF-BaCl_2 have been determined by visual polythermal method.The relationship between the change of cation radius of monovalent fluoride and the areas of primary crystal region in the phase diagrams is discussed.

关键词: phase diagram , null , null , null , null

EFFECT OF LASER SCANNING SPEED ON PHASE CONSTITUTION AND WEAR RESISTANCE OF LASER CLADDING HARD FACING ALLOY STELLITE 12

XU Yourong ZHANG Henghua CHEN Darning XIE Fuchun XU Mingyu Shanghai University of Science and Technology , Shanghai , ChinaCHEN Lanying SU Baorong QIAN Hongbin Shanghai Optics and Fine Mechinery Research Institute , Academia Sinica , Shanghai , China XU Yourong , professor , Department of Materials Science and Engineering , Shanghai University of Science and Technology , Shanghai 201800 , China

金属学报(英文版)

Effect of laser scanning speed on phase constitution,microstructure,microhardness and wear resistance of laser-cladding hard facing alloy Stellite 12 has been investigated by means of a cross-flow-type CO_2 laser of 1.5 kW.The laser-cladding layer on the alloy consists of ma- trix phase of suppersaturated solid solution γ(Co,Cr)and complex hexagonal carbide M_7C_3.Under certain condition,at higher laser scanning speed,the suppersaturated solubility of elements increases in γ(Co,Cr),and the precipitation of the complex carbtde M_7C_3 de- creases,so the microhardness increases and the wear resistance decreases.But at slower laser scanning speed,more complex carbide M_7C_3 may precipitate,and the wear resistance may be improved.Therefore,it is believed that the principal factor in improving wear resistance is the precipitation of carbide M_7C_3,while increment of microhardness is the suppersaturated solu- bility of elements in matrix phase γ(Co,Cr).

关键词: laser-cladding , null , null , null

COMPUTERIZED SIMULATION OF MOLTEN SALT SOLUTION OF Li,KF,Cl SYSTEM BY MOLECULAR DYNAMIC METHOD

SHAO Jun Shanghai University of Science and Technology , Shanghai , ChinaXU Hua CHEN Nianyi Shanghai Institute of Metallurgy , Academia Sinica , Shanghai , China SHAO Jun Associate Professor , Dept.of Chemistry , Shanghai University of Science and Technology , Shanghai 201800 , China

金属学报(英文版)

The structure and properties of molten salt solution o J Li,KF,Cl system have been investigedby computerized simulation of molecular dynamic method.The partial RDF,the partial molarenergy of mixing and the diffusion coeffients of Li~+,K~+,F~- and Cl~- have been calculated.The results are in agreement with the experimental values.The regularities of the distributionof ions and mieroscopic holes are discussed based on the results of computerized simulation.

关键词: alkali halide , null , null , null

Design of cascading two stages of high gain harmonic generation scheme based on Shanghai deep ultraviolet free electron laser

中国物理C

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STUDY ON THE THREESTAGE CREEP OF THE DD3SINGLE CRYSTAL SUPERALLOY

Author X.A. Zhang1) , H.Q. Xia1) , Z.T. Wu1) , Y.F. Han1) , R. Shi2) and G.X. Hu2) \= 1) Mechanical Properties Laboratory , Beijing Institute of Aeronautical Materials , Beijing 100095 , China2) The State Education Commission Open Research Laboratory for High Temperature

金属学报(英文版)

Materials and Testing, Shanghai Jiao Tong University, Shanghai 200030, ChinaManuscript received 18 October 1998 The threestage creep behavior of DD3 single crystal superalloy had been studied. The results show that the creeprupture properties of DD3 single crystal satisfy the requirements for high performance turbine blade application. The influence of crystal orientation on the creeprupture property of DD3 single crystal was tested and discussed. An engineering criterion to evaluate the regimes of secondary and tertiary creep is proposed, and this method gives a reasonable result for practical applications. The fractography and TEM micrography of the tested specimens had been studied, and it is determined that the glidecontrolled creep is the basic creep mechanism of DD3 single crystal at intermediate temperature, but the thermally activated processes become dominant at higher temperature.

关键词: threestage creep curve , null , null , null

Developing carbon materials targeted for applications-A summary on the annual world conference on carbon, Carbon2011

新型炭材料

The 2011 Annual World Conference on Carbon (Carbon 2011) was held in Shanghai, China, during 24-29 July, 2011. This conference was hosted jointly by East China University of Science and Technology, University of Shanghai for Science and Technology, and Institute of Coal Chemistry Chinese Academy of Sciences. About 800 attendees from 42 countries/regions participated in this conference, and 797 papers were accepted for presentation, including 5 plenary lectures, 42 keynote lectures, 280 oral presentations, and 470 posters, involving 10 topics: graphene; nanocarbon, carbon for energy storage and conversion, porous carbon and adsorption, carbon fiber and composites, precursor/carbonization and graphitization, computation and modeling, bio-carbon and safety, novel experimental techniques and characterization, bulk carbon and industrial applications. Research and development of nanocarbons are quite active and in particular, graphene received tremendous interest. Rapid progress has also been made on the electrochemical properties, energy conversion and energy storage applications of carbon materials.

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关于多相材料的研究

材料导报

多相材料是材料研究发展的必然结果。提出多相材料的研究，目的是要拓宽材料研究的视野，主张模糊各类材料的界限，运用纳米材料制备技术，博采各类材料制备工艺之所长，以使用上的要求为材料研究的准则，制作出低成本和高性能稳定性的材料。还强调在考虑材料研究中的问题时，始终以满足使用要求为目标，并不一味地追求材料的高性能，务求创新。提倡用逆向思维来考虑多相材料的研完，研究对象则针对于信息、能源、生物和环保领域的应用。多相材料材料研究About the Research of Multi-phase MaterialsGuo Jingkun (Shanghai Institute of Ceramics,Chinese Academy of Sciences ,Shanghai 200050, China)

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SYNTHESIS OF TiN FILM WITH ION BEAM ENHANCED DEPOSITION AND ITS PROPERTIES

ZHOU Jiankun LIU Xianghuai CHEN Youshan WANG Xi ZHENG Zhihong HUANG Wei ZOU Shichang Shanghai Institute of Metallurgy , Academia Sinica , Shanghai , China

金属学报(英文版)

The TiN films were synthesized with an alternate process of depositing titanium from a E-gun evaporation source and 40 keV N~+ bombarding onto the target.It is shown from the composi- tion analysis and structure investigations using RBS,AES,TEM,XPS and X-ray diffraction spectrum that the formed fihns are mainly composed of TiN phase with grain size of 30—40 nm and without preferred orientation,the nitrogen content in the film is much less than that in case without N~+ bombarding,and an intermixed region about 40 nm thick exists between the film and the substrate.The films exhibt high microhardness and low friction. ZHOU Jiankun,Ion Beam Laboratory,Shanghai Institute of Metallurgy,Academia Sinica, Shanghai 200050,China

关键词: TiN film , null

RESEARCH AND DEVELOPMENT OF NEW SUPERALLOY REMELTING PROCES

W.Xie

金属学报(英文版)

Shanghai No.5 Steel Co., Ltd. has recently introduced a set of 5-ton protective atmosphere electroslag remelting furnace and a set of lO-ton helium-cooling vacuum arc remelting furnace,both of them are the first one of its kind in China. With these equipment, remelting processes about alloy GH4169, GH2132 and GH738 were researched, the process of producing alloy GH4169 by VIM+ VAR + ESR triplex-process was developed, and their effects were discussed.

关键词: superalloy , null , null

STUDY ON THE SiC_p./Al-ALLOY COMPOSITE AUTOMOTIVE BRAKE ROTORS

Z.L. Ding , Y.C. Fan , H.B. Qi , D.L. Ren , J.B. Guo and Z.Q. Jiang Shijiazhuang Railway Institute , Shijiazhuang 050043 , China

金属学报(英文版)

The SiC_p/Al-alloy composite front broke rotors designed for SHANGHAI SANTANA cars were prepared by semi-solid stirring+liquid for ping process. The properties of the composite rotors were examined. The composite brake rotors were subjected to dynamometer tests on a SCHENCK broke testing system, referring to TLll0 standard of VOLKSWAGEN Company. The friction coefficient and thermal response during fade testing and the wear performance of the composite rotors were studied as the function of various parameters, such as braking pressures, initial speeds, initial temperatures, torque and decelerations, and compared with that of conventional cast iron rotors. The results showed that the properties of SiC_p,/Al-alloy composite rotors can achieve the requirements of commercial cast iron rotor.s. The results also suggested that the friction coefficients of composite rotors under different broking conditions are within the deviation band specified by the TLll0 standard, and the temperature rise of the composite rotors at the cud of each fade stop is lower than that of the cast iron rotors. The wear resistance of composite rotors was higher than that of cast iron rotors. The friction and wear mechanism are analyzed.

关键词: SiC_p/Al-alloy composite , null , null , null