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THE EXTRACTED COMPLEX FORMED BY MONO (2-ETHYLHEXYL)-2-ETHYLHEXYL PHOSPHATE WITH DIVALENT Mn

HUANG Kelong , SHU Wanyin , DING Dunhuang , LIU Guogen , DONG Ping , Central South University of Technology , Changsha , China HUANG Kelong , Lecturer , Department of Chemistry , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

In order to clarify the mechanism and the complex formed in the extraction of divalent Mn by alkylphosphonic acid monoester, the solid complex has been prepared by mono (2-ethylhexyl)-2-ethylhexyl phosphate, HEH(EH)P, HA with divalent Mn. The elemental analysis, magnetic susceptibility and thermogra...

关键词: solvent extraction mono (2-ethylhexyl)-2-ethylhexyl phosphate , null , null

A MODEL FOR THE ACTIVITY COEFFICIENTS OF WATER IN THE AQUEOUS SOLUTION OF HCl-MCl_n (M=Ni, Cu, Na AND Fe) WITH CONSTANT CONCENTRATION RATIO XHCl/XMCl_n

Q.R. Zhang , Y.G. Li and Z. Fang (Department of Chemistry , Central South University of Technology , Changsha 410083 , China)(Department of Chemistry , Central South University of Technology , Changsha 410083 , China)(Department of Chemistry , Central South University of Technology , Changsha 410083 , China)

金属学报(英文版)

In orber to calculate the activity coefficients of water in the aqueous solution systems of double electrolytes, HCl and MCln (M=Ni, Cu,Na and Fe), a simplified regular solution model has been derived based on the assumption that the electrolytes in the aqueous solution are treated as independent p...

关键词: solution model; interchange energy; electrolyte solution

BASIC EQUATIONS FOR THERMO-ELECTROCHEMISTRY AND THE ENTROPY CHANGE OF THE STANDARD HYDROGEN ELECTRODE REACTION

FANG Zheng , ZHANG Hengzhong , ZHANG Pingming , HUANG Shengtang , GUO Li and HU Guoqiang(Department of Chemistry , Central South University of Technology , Changsha 410O83 , China)Manuscript received 18 Jnly 1995 , in revised form 14 April 1996

金属学报(英文版)

A set of thermo-electrochemical (TEC) equations for the cell and half-cell reactions has been derived. Is is shown that the difference between the enthalpy change determined by TEC technology and the one calculated with the current thermodynamic data of ions of any half-cell reaction in electochemic...

关键词: : thermo-electrochemistry , null , null

Grain Refiner for TiAl Intermetallic Compounds

Yuehui HE , Yexiang LIU , Baiyun HUANG , Xuanhui QU and Changming LEI (Powder Metallurgy Research Institute , Central South University of Technology , Changsha , 410083 , China)

材料科学技术（英文）

The effect of BN addition on the grain size and rnechanical properties of Ti-34.1 wt-%Al alloy was investigated. It has been found that BN is an effective grain refiner for TiAl base alloys, The addition of a small arnount of BN to TiAl can change the coarse columnar grains of as-cast rnicrostructur...

关键词:

FRACTURE MECHANICS ANALYSIS OF THERMAL STRAIN FATIGUE LIFE FOR THE SINTERING MACHINE PALLET

LI Zhenzi and LI Ming (Department of Architectnre Engineering , Central South University of Technology , Changsha 410083 , China)LIAO Fuchang (Shenzhen School of Technology , Shenzhen 518029 , China)Manuscript received 10 August 1995 , in revised form 12 April 1996

金属学报(英文版)

In recent years elastic-plastic fracture mechanics has developed rapidly and is widely used to solve various engineering problems. The application of elastic-plastic fracture mechanics on the pallet of sintering machine is approached in detail for the first time in the present study. The theoretical...

关键词: : pallet , null , null , null

A Simplified Regular Solution Model for Solubility of Nonmetal (2) in Metal(1)-Metal(3) Alloy Systems

Zheng FANG(Dept. of Chemistry , Central South University of Technology , Changsha 410083 , China)Quanru ZHANG(Dept. of Metallurgy , Changsha Technical College , Changsha 410012 , China)

材料科学技术（英文）

A simplifled regular solution model for the solubility of nonmetallic element (2) in metal(1)-metal(3) alloy system has been derived and applied to the Fe-C-j, Ni-C-j and Fe-N-j (j denotes a metal) systems with satisfaction. The exchange energies of concerned systems are evaluated...

关键词:

AMORPHIZATION TRANSFORMATION BY MECHANICAL ALLOYING IN THE Mo-Si SYSTEM

M.W. Li , R.Z. Tang and W.X. Li (Department of Materials Science and Engineering , Central South University of Technology , Changsha 410083 , China)

金属学报(英文版)

Starting from elemental powders, complete MoSi2 powder forms abruptly between 3.5and 4 h during mechanical alloying (MA) of the Mo-66 at.% Si powders. Continuous milling of this MoSi2 Phase leads to a nanocrystalline powder and amorphizationtransformation takes place after 100 h milling. Howeven MA ...

关键词: mechanical alloying , null , null

EVOLUTION OF MICROSTRUCTURES AND HARDNESS DURING CONTINUOUS THERMO-MECHANICAL PROCESSING OF 6201 ALUMINUM ALLOY

H. Zhang , Y. Y. Liu , D. S. Peng and C. K. Wang (Department of Materials Science and Engineering , Central South University of Technology , Changsha 410083 , China)

金属学报(英文版)

Continuous thermo-mechanical processing (CTMP) of 6201 aluminum alloy was simulated on Gleeble-1500. The deformed specimens were analyzed by the observation of TEM and the measurement of hardness. It was shown that rapid solid solution and aging treatment can be effectively combined in one procedur...

关键词: 6201 aluminum alloy , null , null , null , null

INVESTIGATION OF MULTI-STEP THERMO-MECHANICAL TREATMENT OF CAN-FORGED TiAl-BASED ALLOY

Y.H. He , B. Y. Huang , Y. Liu and Y.X. Liu (Powder Metallurgy Research Institute , Central South University of Technology , Changsha 410083 , China)

金属学报(英文版)

The effects of a new technology, multi-step thermo-mechanical treatment, on the microstructure, deformation substructure and mechanical properties at ambient and elevated tempemture of can-forged Ti-33 Al-3 Cr-0.5Mo (wt%) Alloy were investigated.The results show that, after multi-step thermo-mechani...

关键词: TiAl-based alloy , null , null

A SIMPLIFIED SUBREGULAR SOLUTION MODEL DESCRIBING THE ACTIVITES OF MgCl 2 IN BOTH KCl MgCl 2 LiCl AND CaCl 2 MgCl 2 NaCl MOLTEN SALT SYSTEMS

Q.R.Zhang , Y.G.Li and Z.Fang Department of Chemistry , Central South University of Technology , Changsha 410083 , China

金属学报(英文版)

A simplified subregular solution model was developed for describing the activities of MgCl 2 in both KCl MgCl 2 LiCl and CaCl 2 MgCl 2 NaCl systems on the assumption that the electrolytes in the solution are treated as independent particles in stead of their ion forms and the interchange en...

关键词: activity , null , null , null , null

材料期刊网

THE EXTRACTED COMPLEX FORMED BY MONO (2-ETHYLHEXYL)-2-ETHYLHEXYL PHOSPHATE WITH DIVALENT Mn

A MODEL FOR THE ACTIVITY COEFFICIENTS OF WATER IN THE AQUEOUS SOLUTION OF HCl-MCl_n (M=Ni, Cu, Na AND Fe) WITH CONSTANT CONCENTRATION RATIO XHCl/XMCl_n

BASIC EQUATIONS FOR THERMO-ELECTROCHEMISTRY AND THE ENTROPY CHANGE OF THE STANDARD HYDROGEN ELECTRODE REACTION

Grain Refiner for TiAl Intermetallic Compounds

FRACTURE MECHANICS ANALYSIS OF THERMAL STRAIN FATIGUE LIFE FOR THE SINTERING MACHINE PALLET

A Simplified Regular Solution Model for Solubility of Nonmetal (2) in Metal(1)-Metal(3) Alloy Systems

AMORPHIZATION TRANSFORMATION BY MECHANICAL ALLOYING IN THE Mo-Si SYSTEM

EVOLUTION OF MICROSTRUCTURES AND HARDNESS DURING CONTINUOUS THERMO-MECHANICAL PROCESSING OF 6201 ALUMINUM ALLOY

INVESTIGATION OF MULTI-STEP THERMO-MECHANICAL TREATMENT OF CAN-FORGED TiAl-BASED ALLOY

A SIMPLIFIED SUBREGULAR SOLUTION MODEL DESCRIBING THE ACTIVITES OF MgCl 2 IN BOTH KCl MgCl 2 LiCl AND CaCl 2 MgCl 2 NaCl MOLTEN SALT SYSTEMS

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