检索结果-南通市图书馆

REDUCTIVE　LEACHING　OF　MANGANESE　NODULE　BY　CHALCOPYRITE　INDILUTE　HCL　SOLUTION

在线全文

学校读者我要写书评

暂无评论

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 university 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

ORGANIC－INORGANIC BIO－COMPOSITE As BONE SUBSTITUTE

在线全文

学校读者我要写书评

暂无评论

Journal of central south university 1996年第2期8卷 14-18页

作者： Ruan Jianmin(powder metallurgy research institute, central south university ofTechnology, changsha 410083, China) powder metallurgy research institute Central South University of Technology Changsha 410083 China

ＯＲＧＡＮＩＣ－ＩＮＯＲＧＡＮＩＣＢＩＯ－ＣＯＭＰＯＳＩＴＥＡｓＢＯＮＥＳＵＢＳＴＩＴＵＴＥＲｕａｎＪｉａｎｍｉｎ（ＰｏｗｄｅｒＭｅｔａｌｕｒｇｙＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖ... 详细信息

ＯＲＧＡＮＩＣ－ＩＮＯＲＧＡＮＩＣＢＩＯ－ＣＯＭＰＯＳＩＴＥＡｓＢＯＮＥＳＵＢＳＴＩＴＵＴＥＲｕａｎＪｉａｎｍｉｎ（ＰｏｗｄｅｒＭｅｔａｌｕｒｇｙＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅ，ＣｅｎｔｒａｌＳｏｕｔｈＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎｏｌｏｇ...

关键词： biomaterial biologic effects clinic application

Thermodynamic analysis on synthesis process of diamond

在线全文

学校读者我要写书评

暂无评论

Journal of central south university 2001年第3期13卷 156-160页

作者： YI Jian-hong, PENG Yuan-dong (State Key Laboratory for powder metallurgy, central south university, changsha 410083, China) 1. State Key Laboratory for powder metallurgy Central South University 410083 Changsha China

Based upon the thermodynamic analysis of the nucleation of d iamond crystal, the effects of synthesis temperature and pressure on the nucleat ion of diamond crystal, diamond growth and output of diamond crystal, particle s ize and strength were discussed. The results show that the excess pressure has a n important effect on the critical radius of nucleation and thermodynamic b a rrier in the formation of a critical nucleus. Considering the excess pressure, t he expression of diamond nucleation rate was obtained.

关键词： diamond synthesis pressure temperature nucleation growth

A Constitutive Model for Hot Pressing of powders

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 1994年第5期10卷 374-380页

作者： Rongde GE (Dept. of Nonferrous metallurgy, central south university of Technology, changsha, 410083, China) central south Univ of Technology Changsha China

Based on an assumption that the effective pressure in hot pressing related to the applied pressure varies with the relative density of the compact in a power law form. a three-dimensional viscoelastic model that depicts the viscoelastic detormation behaviour of powder compacts in hot pressing has been developed. It has been shown by the experimental data that the proposed model in which the parameters are determined by means of nonlinear regression analysis can be used to describe the density-time relationship for the hot pressing of pure magnesium oxide and atomized iron powders and to estimate the end-point relative density of the compact.

关键词： A Constitutive Model for Hot Pressing of powders

Fabrication and properties of binder for powder extrusion molding

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2003年第2期22卷 98-102页

作者： ZHOUJicheng HUANGBaiyun SchoolofPhysicsScienceandTechnology CentralSouthUniversityChangsha410083China StateKeyLaboratoryforpowdermetallurgy CentralSouthUniversityChangsha410083China

By optimizing formulation and fabrication methods, a new binder forplasticizing powder extrusion molding of hard metal, with excellent integrated properties anduniform distribution characters, has been developed. Thermal debonding mechanism and the extrudingtheological behaviours have been studied. The technology of fabrication of binder and thermaldebonding process have also been investigated. Using the novel binder, the hard-metalextrusion-molding rods with diameter up to 25mm, have been manufactured.

关键词： powder metallurgy binder powder extrusion molding thermal debonding rheology hard metal

INVESTIGATION OF MULTI-STEP THERMO-MECHANICALTREATMENT OF CAN-FORGED TiAl-BASED ALLOY

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1997年第4期10卷 369-374页

作者： Y.H. He B. Y. Huang Y. Liu and Y.X. Liu (powder metallurgy research institute, central south university of Technology, changsha 410083, China) central south Univ of Technology Changsha China

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 *** results show that, after multi-step thermo-mechanical treatment of can-forged specimens, homogeneous, fine microstructures can be obtained in the whole TiAl-based alloy specimens. Furthermore, the specimen with homogeneous and fine full lamellae microstructure demonstrutes excellent comprehensive mechanical properties at ambient and elevated temperature.

关键词： TiAl-based alloy mechanical property heat treatment

INJECTION MOLDED TUNGSTEN HEAVY ALLOY

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1998年第4期8卷 45-50页

作者： Li Yimin, Qu Xuanhui, Li Zhilin and Huang Baiyun State Key Laboratory for powder metallurgy, central south university of Technology, changsha 410083, P. R. China State Key Laboratory for powder metallurgy Central South University of Technology Changsha 410083 China

ＩＮＴＲＯＤＵＣＴＩＯＮＭｅｔａｌＩｎｊｅｃｔｉｏｎＭｏｌｄｉｎｇ（ＭＩＭ），ｗｈｉｃｈｉｓｄｅｒｉｖｅｄｆｒｏｍｐｌａｓｔｉｃｉｎｊｅｃｔｉｏｎｍｏｌｄｉｎｇ，ｉｓａｋｉｎｄｏｆｎｅｗｌｙｄｅｖｅｌｏｐｅｄｐｏｗｄ... 详细信息

ＩＮＴＲＯＤＵＣＴＩＯＮＭｅｔａｌＩｎｊｅｃｔｉｏｎＭｏｌｄｉｎｇ（ＭＩＭ），ｗｈｉｃｈｉｓｄｅｒｉｖｅｄｆｒｏｍｐｌａｓｔｉｃｉｎｊｅｃｔｉｏｎｍｏｌｄｉｎｇ，ｉｓａｋｉｎｄｏｆｎｅｗｌｙｄｅｖｅｌｏｐｅｄｐｏｗｄｅｒｍｅｔａｌｕｒｇｙｆｏｒｍｉｎ...

关键词： injection molding heavy alloy powder loading

FRICTION AND WEAR BEHAVIOUR OF SINTERED BRASS

在线全文

学校读者我要写书评

暂无评论

Journal of central south university 1994年第1期6卷 23-28页

作者： Li Xibin Tan Linying Su Chunming Li Meiying(powder metallurgy research institute, central south university of Technology, changsha, 410083, China) 1. powder metallurgy research institute Central South University of Technology 410083 Changsha China

The processing of sintered brass products is described. The effect of processing parameters on the mechanical properties of the products is discussed. The relationship between the main mechanical properties and the friction and wear characteristics is analyzed. The tribological behaviour of the material is determined under different conditions (speed, load, time, environment etc). Comparison is made with that of dense products. The friction and wearmechanisms are investigated. Results are instructive to the application of the material.

关键词： powder metallurgy tribology sintered brass

Preparation of Li-B Alloy and Study of Its Microstructure and Discharge Characteristics

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2000年第6期16卷 581-584页

作者： Zhijian LIU, Zhiyou LI, Wei DUAN, Xuanhui QU, Baiyun HUANG and Siqi ZHANG (State Key Laboratory for powder metallurgy , central-south university of Technology, changsha 410083, China) [Manuscript received November 2, 1999] State Key Lab. for powder Metall. Central South Univ. of Technol. Changsha 410083 China

A Li-B alloy has been prepared using a pretreated amorphous B powder and pure Li ingot as starting materials by continually slow addition of B powder and intensified stirring in the process of melting. The microstructure and the discharge characteristic of the materials have been investigated- Results show that the problem of temperature control in synthesis would be modified by means of continual addition of B powder, the Li7B6 would be more finely distributed in the metal Li by means of intensified stirring. The discharge characteristic of the Li-B alloy using amorphous B as starting materials is almost the same with that of using crystalline B.

关键词： Li Preparation of Li-B Alloy and Study of Its Microstructure and Discharge Characteristics