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Journal of Materials science & technology 2006年第4期22卷 559-564页

作者： Dongping TAO Faculty of Materials and Metallurgical Engineering, kunming university of science and technology, kunming 650093, China Faculty of Materials and Metallurgical Engineering Kunming University of Science and Technology Kunming 650093 China

The molecular interaction volume model (MIVM) for a general ternary system was deduced in detail for further clarifying and understanding its general multicomponent expression. Both MIVM and the unified interaction parameter formalism (UIPF) can be used to predict the activities of solutes and solvents in the Fe-Cr-Ni liquid alloys. But the former employs only the infinite dilute activity coefficients, and the later is not applicable without the dilute binary and ternary interaction parameters. MIVM has a certain physical meaning from the viewpoint of statistical thermodynamics, so it is an alternative for the estimation of activity coefficients of the solutes and solvents in a dilute or finite concentration metal solution where the interaction parameters are absent or their accuracies are questionable.

关键词： Activity Prediction Molecular interaction volume model Unified interaction parameter formalism

Desulfurization of Nickel Pyrrhotite by Steam in the Microwave Field

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Journal of Materials science & technology 2001年第5期17卷 561-564页

作者： Jinhui PENG and Chunpeng LIU Department of Metallurgy, kunming university of science and technology, kunming 650093, China Dept. of Metall. Kunming Univ. of Sci. and Technol. Kunming 650093 China

Desulfurization of Ni pyrrhotite by steam in the microwave field was studied. According to the experimental data, the desulfurization rate by microwave heating is faster than that by conventional one. The desulfurization reaction is in a non-isothermal state and in a diffusion control because of the effect of chemical reaction heat, phase formation and intrinsic properties of materials of microwave absorbability. When the flow rate of steam was in the range of 180 similar to 220 mL/min, the temperature and desulfurization rate approached to a maximum and the activation energy to a minimum.

关键词： Ni Desulfurization of Nickel Pyrrhotite by Steam in the Microwave Field

Phase behavior of TXs/toluene/water microemulsion systems for solubilization absorption of toluene

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Journal of Environmental sciences 2010年第2期22卷 271-276页

作者： Lian Liu,Senlin Tian ,Ping Ning Faculty of Environmental science and Engineering,kunming university of science and technology,kunming 650093,China Faculty of Environmental science and Engineering Kunming University of Science and Technology Kunming 650093 Chin

Triton Xs （TXs） surfactants/cosurfactant/water/oil （toluene） microemulsion systems for enhancing toluene solubilization were proposed and its potential was investigated for toluene removal from gas stream. The results indicated that TX-100 was superior to other TXs surfactants in removing toluene without cosurfactant. The efficiency of cosurfactants for improving toluene solubilization capacity follows the order： amine 〉 alcohol 〉 acid. According to the factor analysis, the linear cosurfactants are better than the branched ones. The effects of hydrophile-lipophile balance （HLB）, salt （NaCl） concentration and temperature on the formation of microemulsion system were also discussed. The results suggested that the optimum value of HLB was 15, the effect of NaCl concentration on the system was inconspicuous and the lower temperature enhanced the solubilization capacity. Nonionic surfactant-based microemulsions had a significant absorption enhancement for toluene, indicated by as much as 82.72% of toluene in phase composition diagram, which will have a great prospect in air pollution treatment.

关键词： microemulsion phase behavior absorption toluene

Evaporation Kinetics of SnS from SnS-Cu_2S Melts

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Journal of Materials science & technology 1998年第1期14卷 45-48页

作者： Yixin HUA and Chunpeng LIU (Dept. of Metallurgy, kunming university of science and technology, kunming 650093, China) Dept. of Metallurgy Kunming University of Science and Technology Kunming 650093 China

The kinetics of SnS evaporation from SnS-Cu2S melts was investigated by a unique experimental method. It is shown that the process is controlled by the mass transport of SnS in gas phase. The evaporation rate of SnS is significantly enhanced by increasing tempeature and carrier gas flow rate. The apparent activation energy for the process is found to be 204.67 kJ. The evaporation rate for the present system is much smaller than that for SnS-FeS system.

关键词： SnS Cu Evaporation Kinetics of SnS from SnS-Cu2S Melts

Solution of an Inverse Problem of Heat Conduction of 45 Steel with Martensite Phase Transformation in High Pressure during Gas Quenching

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Journal of Materials science & technology 2002年第4期18卷 372-374页

作者： Heming CHENG, Tianchun HE and Jianbin XIEDepartment of Engineering Mechanics, kunming university of science and technology, kunming 650093, China Dept. of Eng. Mech. Kunming Univ. of Sci. and Technol. Kunming 650093 China

In order to simulate thermal strains, thermal stresses, residual stresses and microstructure of the steel during gas quenching by means of the numerical method, it is necessary to obtain an accurate boundary condition of temperature field. The surface heat transfer coefficient is a key parameter. The explicit finite difference method, nonlinear estimation method and the experimental relation between temperature and time during gas quenching have been used to solve the inverse problem of heat conduction. The relationship between surface temperature and surface heat transfer coefficient of a cylinder has been given. The nonlinear surface heat transfer coefficients include the coupled effects between martensitic phase transformation and temperature.

关键词： 45 steel Phase transformation Heat conduction

Algorithm of symbol generation and configuration of land polygons in present land-use map

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中国有色金属学会会刊：英文版 2011年第S3期21卷 743-747页

作者： ZUO Xiao-qing, NIE Jun-tang Faculty of Land Resource Engineering, kunming university of science and technology, kunming 650093, China Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 China

The symbolization of land polygon is an important part of cartography. In the mapping of traditional present land-use maps, the symbol of land polygons was usually filled by the method of filling or plotting, but these methods can't solve the spatial conflicts of the symbol. According to the principle of cartography, the rule of how to symbolize the land polygon was summarized, and a new method that can generate and deploy the land symbols was presented. By making use of C# programming language and Arc Engine developing components, the algorithm can generate land symbols presenting triangle and adjust the coordinate of the symbol. Through mapping the present land-use map of Honghe county, this algorithm can reduce 88.84% of the spatial conflicts error rate compared with the traditional methods. It improves the accuracy and efficiency of the map symbolic.

关键词： land symbol present land use map symbol configuration spatial conflict

Electrodeposition of Ni-W Amorphous Alloy and Ni-W-SiC Composite Deposits

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Journal of Materials science & technology 2000年第3期16卷 323-326页

作者： Zhongcheng GUO, Xiaoyun ZHU, Dacheng ZHAI and Xianwan YANG (Department of Metallurgy, kunming university of science and technology, kunming 650093, China) Department of Metallurgy Kunming University of Science and Technology Kunming 650093 China

Ni-W alloys and their composite deposits are electroplated on the metals when an appropriate complex agent is selected on the base of the theories of electrochemistry and complex chemistry, and the principle of induced codeposition. Effects of the bath composition, pH value, temperature and current density on the electrode position of Ni-W alloys and their composite deposits have been investigated, and the effect of heat treatment temperature on the hardness, structure and cohesive force of the amorphous Ni-W alloys and their composite deposits are also discussed. Results showed that the alloys containing more than 44 wt pct W content and the composite deposits containing 7.8 wt pct SiC content could be obtained by making use of the appropriate bath composition and plating conditions. Alloys and their composite deposits with over 44 wt pct W content show amorphous structure. The hardness of amorphous Ni-W alloys and their composite deposits increases obviously when heated, and can reach to 1350 HV and 1520 HV respectively for 46 wt pct W content. The cohesion on Cu, carbon steel and stainless steel is very good.

关键词： SiC Electrodeposition of Ni-W Amorphous Alloy and Ni-W-SiC Composite Deposits Ni

Evaluation of reclamation land productivity in mining districts

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中国有色金属学会会刊：英文版 2011年第S3期21卷 717-722页

作者： WU Xue-qun, ZUO Xiao-qing, FANG Yuan-min Faculty of Land Resource Engineering, kunming university of science and technology, kunming 650093, China Faculty of Land Resource Engineering Kunming University of Science and Technology Kunming 650093 China

In order to evaluate the productivity of reclamation lands in mining districts, field investigation and spatial information technique were adopted to investigate influence factors of land. Based on the collected data of each land, membership grade of each factor was obtained based on Fuzzy logic, and combined weight of each factor was got by analytica1 hierarch process and Delphi method. According to membership grades and combined weights of all factors, integrated fertility index (IFI) of every land was calculated to reflect levels of the productivity of reclamation lands in mining districts. Experimental results show that spatial information technique is an efficient method in field data collection, while lack of evaluation data. By means of quantificational analysis of this method, IFI is appropriate to describe the productive capacity level of reclamation lands.

关键词： mining districts reclamation productivity evaluation membership grade

Comparison of the Molecular Interaction Volume Model with the Wagner Formulae in the Zn-Pb-In and Zn-Sn-Cd-Pb Dilute Solutions

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Journal of Materials science & technology 2004年第3期20卷 279-284页

作者： Dongping TAO Zhuo CHEN Dunfang LI Yifeng GAO Qianghua SHEN School of Materials and Metallurgical Engineering, kunming university of science and technology, kunming 650093, China Sch. of Mat. and Metall. Eng. Kunming Univ. of Sci. and Technol. Kunming 650093 China

The coordination numbers in the molecular interaction volume model (MIVM) can be calculated from the commonphysical quantities of pure liquid metals. A notable feature of the model lie in its capability to predict the ther-modynamic properties of solutes in the Zn-Pb-In and Zn-Sn-Cd-Pb dilute solutions using only the binary infinitedilute activity coefficients, and the predicted values are in good agreement with the experimental data of the dilutesolutions.

关键词： Activity Prediction Dilute metal solution Molecular interaction volume model

Molecular dynamics simulation on thermodynamic properties of Pb-Ag alloys

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Rare Metals 2010年第3期29卷 323-326页

作者： JIA Guobin,LIU Yuanyuan,YANG Bin,and LIU Dachun National Engineering Laboratory of Vacuum Metallurgy,kunming university of science and technology,kunming 650093,China National Engineering Laboratory of Vacuum Metallurgy Kunming University of Science and Technology Kunming China

Molecular dynamics simulation was used to simulate the thermodynamic properties of three binary alloys,Pb-Ag （1：1）,Pb-Ag （4：1）,and Pb-Ag （9：1）.The energy functions,such as excess free energy,cohesive energy,and formation energy,were *** calculated values agree well with the experimental *** atomic interactions were analyzed in macroscopic and microcosmic views and both are consistent well.

关键词： molecular dynamics energy function generalized embedded atom method Pb-Ag alloy