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Ti/Al_2O_3 Functionally Gradient Material Prepared by the Explosive Compaction/SHS Process

Journal of Materials Science & Technology 1999年第3期15卷 271-275页

作者： Yimin LI(Powder Metallurgy Research Institute, central-south univ.rsity of Technology, Changsha 410083, China)Ziqiao ZHENG(Department of Materials Science and Engineering, central-south univ.rsity of Technology, Changsha 410083, China) Cent S univ.Technol Powder Met Res Inst Changsha 410083 Peoples R China Cent S univ.Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

Ti1Al2O3 Functionally Gradient Material (FGM) was prepared by an explosive compaction/SHS process. Ten sheets of the compounding powder were laminated and pressed to get a green body of FGM. It was then compacted explosively By burying the explosive compaction body into a stoichiometric Al/TiO2 mixture and igniting the combustion of the stoichiometric Al/TiO2 mixture, the SHS reaction of the explosive compaction body was initiated by the heat released from the combustion of the stoichiometric Al/TiO2 mixture. In this way, Ti/Al2O3 FGM was synthesized. The adiabatic temperatures of each gradient layer were calculated when the preheating temperatures were 298 K and 1173 K, respectively The microstructure, composition and properties of Ti/Al2O3 FGM and the reaction mechanism of each gradient layer were studied. It was found that Ti/Al2O3 FGM prepared by the explosive compaction/SHS process had a high density and a high microhardness. Its structure, composition and properties showed apparent gradient distribution. The structure of the standard stoichiometric ratio gradient layer of FGM was a network structure. Its reaction mode could be described as follows: Al powder melted first, then the molten Al penetrated into the TiO2 zone and reacted with TiO2, and big pores were left in the original positions of Al powder. The reaction of gradient layers with the addition of Al3O3 as diluents was similar to that of the standard stoichiometric ratio gradient layer, so were their structure and composition. However, the reaction of gradient layers with the addition of Ti as diluents was more complex and the composition deviated slightly from the designed one

关键词： Al SHS Ti/Al2O3 Functionally Gradient Material Prepared by the Explosive Compaction/SHS Process

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ADSORPTION AND ACTIVATION OF METAL IONS ON KYANITE

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中国有色金属学会会刊：英文版 1996年第3期6卷 22-24页

作者： Dong Hongjun Chen Jin(Department of Mineral Engineering,central south univ.rsity of Technology, Changsha 410083) CENT S univ.TECHNOL DEPT MINERAL ENGNCHANGSHA 410083PEOPLES R CHINA

ＡＤＳＯＲＰＴＩＯＮＡＮＤＡＣＴＩＶＡＴＩＯＮＯＦＭＥＴＡＬＩＯＮＳＯＮＫＹＡＮＩＴＥ￥ＤｏｎｇＨｏｎｇｊｕｎ；ＣｈｅｎＪｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｅｒａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵ... 详细信息

ＡＤＳＯＲＰＴＩＯＮＡＮＤＡＣＴＩＶＡＴＩＯＮＯＦＭＥＴＡＬＩＯＮＳＯＮＫＹＡＮＩＴＥ￥ＤｏｎｇＨｏｎｇｊｕｎ；ＣｈｅｎＪｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭｉｎｅｒａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏ...

关键词： metal ion kyanite sodium oleate adsorption flotation

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PREPARATION OF ULTRAFINE NICKEL POWDER

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中国有色金属学会会刊：英文版 1996年第2期6卷 22-23,4+25页

作者： Chai Liyuan Zhong Haiyun(Department of Nonferrous Metallurgy,central south univ.rsity of Technology, Changsha 410083) CENT S univ.TECHNOL DEPT NONFERROUS METCHANGSHA 410083PEOPLES R CHINA

ＰＲＥＰＡＲＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＮＩＣＫＥＬＰＯＷＤＥＲＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒ... 详细信息

ＰＲＥＰＡＲＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＮＩＣＫＥＬＰＯＷＤＥＲＣｈａｉＬｉｙｕａｎ；ＺｈｏｎｇＨａｉｙｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇｙ，...

关键词： ultrafine nickel powder nickel sulphate hydrazine

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EQUIVALENT CIRCUIT OF NONLINEAR EFFECT OF SPECTRAL IP

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中国有色金属学会会刊：英文版 1995年第4期5卷 1-7页

作者： He, Jishan Li, Daqing Tang, Jingtian(Department of Geology, central south univ.rsity of Technology, Changsha 410083) central south univ.of Technology Changsha China

ＥＱＵＩＶＡＬＥＮＴＣＩＲＣＵＩＴＯＦＮＯＮＬＩＮＥＡＲＥＦＦＥＣＴＯＦＳＰＥＣＴＲＡＬＩＰ￥Ｈｅ，Ｊｉｓｈａｎ；Ｌｉ，Ｄａｑｉｎｇ；Ｔａｎｇ，Ｊｉｎｇｔｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，Ｃｅｎｔｒａｌ... 详细信息

ＥＱＵＩＶＡＬＥＮＴＣＩＲＣＵＩＴＯＦＮＯＮＬＩＮＥＡＲＥＦＦＥＣＴＯＦＳＰＥＣＴＲＡＬＩＰ￥Ｈｅ，Ｊｉｓｈａｎ；Ｌｉ，Ｄａｑｉｎｇ；Ｔａｎｇ，Ｊｉｎｇｔｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｌｏｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆ...

关键词： spectral IP nonlinear effect equivalent circuit admittance anode/cathode polarizaTion

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Heat transfer analysis for the roller shell under the condition of periodic thermal shock

引用

Journal of univ.rsity of Science and Technology Beijing 2003年第6期10卷 44-47页

作者： Lihua Zhan and Xiaoqian LiCollege of Electro-mechanical Engineering, central south univ.rsity, Changsha 410083, China College of Electro-mechanical Engineering Central South University Changsha 410083 China

According to the actual working conditions of roller shell in the process ofcontinuous roll casting, the Fourier heat transfer law is used to conduct the simulating analysisfor the temperature distribution of the roller shell under the condition of periodic thermal *** temperature variation law inside the roller shell is studied during the process of continuousroll casting, and the steady temperature distributions of the roller shell at different castingvelocities have been obtained when the thermal contact conductance between the roller shell and thecasting strip is considered.

关键词： roller shell thermal contact conductance (TCC) periodic thermal shock

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Spectroscopic Features and Formation Conditions of Sphalerite in the Lead-Zinc Deposit, Guangdong,China

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Acta Geologica Sinica(English Edition) 1989年第4期63卷 361-372页

作者： Li Di’en~x② and Peng Mingsheng central-south univ.rsity of Technology, Changsha, Hunan 2Li Di 'en: Male born in 1962 graduated in 1985 as Msc from the Department of Geology Central-South University of Technology and now a lecturer of the same department engaged in mineralogical teaching and research Address: Dept. of Geology Central-South University of Technology Changsha Hunan China. central-south univ.rsity of Technology Changsha Hunan

Electron paramagnetic resonance spectra, absorption spectra, cathodoluminescence spectra and infrared spectra of sphalerite from the Lechang remoulded sedimentary lead-zinc deposit have been studied so as to provide microscopic evidence for the formation conditions and mineralization stages of the deposit as well as the geochemical processes of mineralization. On the basis of thermodynamic calculations, the stable fields of sphalerite from different mineralization stages were determined and are shown in logfs_2-logfo_2 diagrams; furthermore. the physico-chemical conditions of mineralization and the properties of mineralization solutions are discussed so that reliability of the genetic information provided by the spectroscopy of sphalerite may also be verified. It is suggested that the temperature and pH value of the mineralization system decrease, and so do the fugacities of O_2, S_2, H_2. and H_2S and the activities of HS^- and SO_4^(2-) from the early to late stages of minerahzation.

关键词： Pro Spectroscopic Features and Formation Conditions of Sphalerite in the Lead-Zinc Deposit Guangdong,China

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Boron rings containing planar octa- and enneacoordinate cobalt, iron and nickel metal elements

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Science China Chemistry 2008年第7期51卷 607-613页

作者： LUO Qiong School of Chemistry and Chemical Engineering, central south univ.rsity, Changsha 410083, China School of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

For a series of boron rings with planar hyper-coordinate 8th group transition metal atoms, singlet 1FeB8-2, multiplet kFeB9n (n = -1, k = 1; n = 0, k = 2), singlet 1CoB8n(n = -1, +1, +3), multiplet kCoB9n (n = +1, k = 2; n = 0, k = 1) and singlet 1NiB9+, the geometry structures have been optimized to be local minima on corresponding potential hyper-surfaces. The electron structures are discussed by orbital analysis and the aromaticity is predicted by nucleus-independent chemical shifts calculation at both the B3LYP/6-311+G* and BP86/6-311+G* levels of theory, respectively. The results suggest that all these structures with high symmetry planar geometries are stable and have aromatic properties with six π valence electrons.

关键词： planar hyper-coordinate transition metal DFT

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ELECTRON DIFFRACTION PATTERNS ANALYSIS OF PRECIPITATES IN LD_(10) ALLOY

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中国有色金属学会会刊：英文版 1995年第3期5卷 119-123页

作者： Jin, Tounan Yin, Zhimin(Department of Materials Science and Engineering,central south univ.rsity of Technology, Changsha 410083) central south univ.of Technology Changsha China

ＥＬＥＣＴＲＯＮＤＩＦＦＲＡＣＴＩＯＮＰＡＴＴＥＲＮＳＡＮＡＬＹＳＩＳＯＦＰＲＥＣＩＰＩＴＡＴＥＳＩＮＬＤ_（１０）ＡＬＬＯＹ￥Ｊｉｎ，Ｔｏｕｎａｎ；Ｙｉｎ，Ｚｈｉｍｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳ... 详细信息

ＥＬＥＣＴＲＯＮＤＩＦＦＲＡＣＴＩＯＮＰＡＴＴＥＲＮＳＡＮＡＬＹＳＩＳＯＦＰＲＥＣＩＰＩＴＡＴＥＳＩＮＬＤ_（１０）ＡＬＬＯＹ￥Ｊｉｎ，Ｔｏｕｎａｎ；Ｙｉｎ，Ｚｈｉｍｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒ?..

关键词： precipitate simulated diffraction pattern transformation matrix

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REDUCTIVE　LEACHING　OF　MANGANESE　NODULE　BY　CHALCOPYRITE　INDILUTE　HCL　SOLUTION

引用

中国有色金属学会会刊：英文版 1995年第1期5卷 53-56页

作者： Guo Xueyi(Department of Nonferrous Metallurgy ,central south univ.rsity of Technolegy, Changsha 410083) CENT S univ.TECHNOL DEPT NONFERROUS METCHANGSHA 410083PEOPLES R CHINA

ＲＥＤＵＣＴＩＶＥＬＥＡＣＨＩＮＧＯＦＭＡＮＧＡＮＥＳＥＮＯＤＵＬＥＢＹＣＨＡＬＣＯＰＹＲＩＴＥＩＮＤＩＬＵＴＥＨＣＬＳＯＬＵＴＩＯＮＧｕｏ；Ｘｕｅｙｉ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇ... 详细信息

ＲＥＤＵＣＴＩＶＥＬＥＡＣＨＩＮＧＯＦＭＡＮＧＡＮＥＳＥＮＯＤＵＬＥＢＹＣＨＡＬＣＯＰＹＲＩＴＥＩＮＤＩＬＵＴＥＨＣＬＳＯＬＵＴＩＯＮＧｕｏ；Ｘｕｅｙｉ（ＤｅｐａｒｔｍｅｎｔｏｆＮｏｎｆｅｒｒｏｕｓＭｅｔａｌｌｕｒｇｙ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉ...

关键词： manganese nodule chalcopyrite leaching

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ANALYSIS OF DISSIPATIVE STRUCTURE IN MATERIAL COMMINUTION

引用

中国有色金属学会会刊：英文版 1995年第1期5卷 21-24,41页

作者： Zhang Zhitie(Department of Mechanical Engineering, central south univ.rsity of Technology, Changsha 410083) CENT S univ.TECHNOL DEPT MECH ENGNCHANGSHA 410083PEOPLES R CHINA

ＡＮＡＬＹＳＩＳＯＦＤＩＳＳＩＰＡＴＩＶＥＳＴＲＵＣＴＵＲＥＩＮＭＡＴＥＲＩＡＬ　ＣＯＭＭＩＮＵＴＩＯＮＺｈａｎｇ；Ｚｈｉｔｉｅ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏ... 详细信息

ＡＮＡＬＹＳＩＳＯＦＤＩＳＳＩＰＡＴＩＶＥＳＴＲＵＣＴＵＲＥＩＮＭＡＴＥＲＩＡＬ　ＣＯＭＭＩＮＵＴＩＯＮＺｈａｎｇ；Ｚｈｉｔｉｅ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｃｈａｎｉｃａｌＥｎｇｉｎｅｅｒｉｎｇ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅ...

关键词： material comminution dissipative structure catastrophe nonlinear thermodynamics dynamics

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