检索结果-南通市图书馆

SIDEBANDS OF X-RAY DIFFRACTION IN AGE-HARDENED Cu-Ti 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 1996年第4期6卷 87-93页

作者： Wei Yinghui Wang Xiaotian(school of materials science and engineering,Xi’an Jiaotong University,Xi’an 710049) school of materials science and engineering Xi'an Jiaotong University Xi'an 710049 China

ＳＩＤＥＢＡＮＤＳＯＦＸ－ＲＡＹＤＩＦＦＲＡＣＴＩＯＮＩＮＡＧＥ－ＨＡＲＤＥＮＥＤＣｕ－ＴｉＡＬＬＯＹ￥ＷｅｉＹｉｎｇｈｕｉ；ＷａｎｇＸｉａｏｔｉａｎ（ＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎ... 详细信息

ＳＩＤＥＢＡＮＤＳＯＦＸ－ＲＡＹＤＩＦＦＲＡＣＴＩＯＮＩＮＡＧＥ－ＨＡＲＤＥＮＥＤＣｕ－ＴｉＡＬＬＯＹ￥ＷｅｉＹｉｎｇｈｕｉ；ＷａｎｇＸｉａｏｔｉａｎ（ＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，Ｘｉ＇ａｎＪｉａｏｔ...

关键词： Cu-Ti alloy X-ray diffraction sidebands static lattice wave theory

Corrosion science general-purpose data model and interface (Ⅱ): OOD design and corrosion data markup language (CDML)

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2008年第11期51卷 1850-1857页

作者： TANG ZiLong school of materials science and engineering, Tianjin University, Tianjin 300072, China school of materials science and engineering Tianjin University Tianjin China

With object oriented design/analysis, a general purpose corrosion data model (GPCDM) and a corrosion data markup language (CDML) are created to meet the increasing demand of multi-source corrosion data integration and sharing. "Cor- rosion data island" is proposed to model the corrosion data of comprehensiveness and self-contained. The island of tree-liked structure contains six first-level child nodes to characterize every important aspect of the corrosion data. Each first-level node holds more child nodes recursively as data containers. The design of data structure inside the island is intended to decrease the learning curve and break the acceptance barrier of GPCDM and CDML. A detailed explanation about the role and meaning of the first-level nodes are presented with examples chosen carefully in order to review the design goals and requirements proposed in the previous paper. Then, CDML tag structure and CDML application programming interface (API) are introduced in logic order. At the end, the roles of GPCDM, CDML and its API in the multi-source corrosion data integration and information sharing are highlighted and projected.

关键词： corrosion data model corrosion data markup language (CDML) application programming interface (API) information sharing

Corrosion science general-purpose data model and interface (I): Meanings and issues of design and implementation

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2008年第9期51卷 1394-1401页

作者： TANG ZiLong school of materials science and engineering, Tianjin University, Tianjin 300072, China school of materials science and engineering Tianjin University

A brand new design of integrated corrosion information system is introduced to meet the constantly increasing demands of material corrosion information. Two concepts, "general-purpose corrosion data model" and "public corrosion data ex-changing interface", are suggested to integrate a wide variety of corrosion data sources based on detailed analysis on characteristics of each source in order to promote the information sharing and data mining. The architecture of integrated corrosion information environment is blueprinted. The insight analysis is focused on 1) architecture of the system; 2) data flow and information sharing; 3) roles of system players and their interactions; 4) approaches to data integration. Several key issues are addressed in detail including coverage of data model, data source integration and mitigation, and data granularity from system performance and model acceptance points of view. At the end, the design and implementation ap-proach of general corrosion data model is presented based on cutting edge IT techniques.

关键词： corrosion multi-source data modeling integrated information system

Sol-gel Preparation and Infrared Radiation Property of Boron-substituted Cordierite Glass-ceramics

在线全文

学校读者我要写书评

暂无评论

Journal of materials science & Technology 2010年第5期26卷 445-448页

作者： Shuming Wang and Fenghua Kuang school of materials science and engineering,University of science & Technology Beijing,Beijing 100083,China school of materials science and engineering University of Science & Technology Beijing Beijing 100083 China

Boron for aluminum substitution in the cordierite structure has been examined by sol-gel preparation of different samples along the compositional junction Mg2Al4-xBxSi5O18 with x=0,0.5,1,*** increasing the x value from 0 to 1.5 the crystallization behavior changed *** amount B2O3 doping can promote the sintering of amorphous cordierite gel,effectively restrain the precipitation of μ-cordierite and enhance the crystallization of α-*** substitution of B3＋ for Al3＋ in cordierite crystal structure can effectively improve the near-infrared spectral emissivity of this cordierite based glass-ceramics.

关键词： Sol-gel Glass-ceramics Infrared radiation B3+ substitution Solid solution

Corrosion science general-purpose data model and interface (Ⅲ):Data integration and management environment

在线全文

学校读者我要写书评

暂无评论

science China(Technological sciences) 2008年第12期51卷 2089-2094页

作者： TANG ZiLong school of materials science and engineering,Tianjin University,Tianjin 300072,China school of materials science and engineering Tianjin University Tianjin China

A brand new Corrosion Data Integration and Management Environment(CDIME) is developed in Java programming language based on general-purpose corrosion data model(GPCDM) and corrosion data markup language(CDML) proposed in the previous *** general,the functionalities and features of CDIME meet most of design requirements including composition,inheritance,self-contained,relatively independence and so *** insight tutorial is introduced on the life circle of corrosion data islands from its creation,maintenance,and application like *** template feature makes the building of comprehensive data island as simple as a few mouse ***-only publishing of data as e-Book and PDF hold their own *** document can be imported and exported freely on any running *** achieving feature is addressed in detail because it is critical to data sharing and integration in *** the end,a real example is presented to help the understanding of data islands assembling and the advanced features offered by CDIME.

关键词： corrosion software data model information integration

Recovery of high-purity Pt from Pt-Au bimetallic nanoparticles using organic aqua regia

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2012年第1期31卷 92-95页

作者： LIN Wei school of materials science & engineering,Georgia Institute of Technology,Atlanta,Georgia,30332,USA school of materials science & engineering Georgia Institute of Technology Atlanta USA

Using organic aqua regia,a recently discovered powerful organic leaching agent,an effective process of recovering Pt directly from Pt-Au bimetallic nanoparticles was *** purities of the Pt recovered from a mixture of Au and Pt nanoparticles and from Pt-Au core-shell nanoparticle catalyst are as high as (99.49±0.22)%,and (95.02±0.08)%,*** novel recovery process promises applications in catalysis industry.

关键词： organic aqua regia bimetallic platinum gold nanoparticle recovery

Application of mesoscale modeling optimization to development of advanced materials

在线全文

学校读者我要写书评

暂无评论

Progress in Natural science:materials International 2004年第8期14卷 8-15页

作者： SONG Xiaoyan(school of materials science and engineering, Beijing University of Technology, Beijing 100022, China) school of materials science and engineering Beijing University of Technology Beijing 100022 China

The rapid development of computer modeling in recent years offers opportunities for materials preparation in a more economic and efficient way. In the present paper, a practicable route for research and development of advanced materials by applying the visual and quantitative modeling technique on the mesoscale is introduced. A 3D simulation model is developed to describe the microstructure evolution during the whole process of deformation, recrystallization and grain growth in a material containing particles. In the light of simulation optimization, the long-term stabilized fine grain structures ideal for high-temperature applications are designed and produced. In addition, the feasibility, reliability and prospects of material development based on mesoscale modeling are discussed.

关键词： mesoscale computer simulation Monte Carlo technique deformation recrystallization grain growth.

Effects of silver powder particle size on the microstructure and properties of Ag-Yb_2O_3 electrical contact materials prepared by spark plasma sintering

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2010年第4期29卷 366-370页

作者： CHEN Xiaohua,JIA Chengchang,and LIU Xiangbing school of materials science and engineering,University of science and Technology Beijing,Beijing 100083,China school of materials science and engineering University of Science and Technology Beijing Beijing China

mg-Yb203 electrical contact materials were fabricated by spark plasma sintefing （SPS）. The effects of silver powder particle size on the microstructure and properties of the samples were investigated. The surface morphologies of the sintered samples were examined by optical microscope （OM）, and the fracture morphologies were observed by scanning electron microscopy （SEM）. The physical and mechanical properties such as density, electrical resistivity, microhardness, and tensile strength were also tested. The results show that the silver powder particle size has evident effects on the sintered materials. Comparing with coarse silver powder （5 ktm）, homogeneous and fme microstmcture was obtained by fine silver powder （_〈0.5-1am）. At the same time, the electrical conductivity, microhardness, and tensile strength of the sin- tered samples with fine silver powder were higher than those of the samples with coarse silver powder. However, silver powder particle size has little influence on the relative densities, which of all samples （both by free and coarse silver powders） is more than 95%. The fracture characteristics are ductile.

关键词： composites electrical contact materials spark plasma sintering particle size microstructure physical properties mechanical properties

Effect of powder mixing process on the microstructure and thermal conductivity of Al/diamond composites fabricated by spark plasma sintering

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2010年第1期29卷 86-91页

作者： CHU Ke, JIA Chengchang, LIANG Xuebing, and CHEN Hui school of materials science and engineering, University of science and Technology Beijing, Beijing 100083, China school of materials science and engineering University of Science and Technology Beijing

Two powder mixing processes, mechanical mixing （MM） and mechanical alloying （MA）, were used to prepare mixed Al/diamond powders, which were subsequently consolidated using spark plasma sintering （SPS） to produce bulk Al/diamond composites. The effects of the powder mixing process on the morphologies of the mixed powders, the microstructure and the thermal conductivity of the composites were investigated. The results show that the powder mixing process can significantly affect the microstructure and the thermal conductivity of the composites. Agglomerations of the particles occurred in mixed powders using MM for 30 min, which led to high pore content and weak interfacial bonding in the composites and resulted in low relative density and low thermal conductivity for the composites. Mixed powders of homogeneous distribution of diamond particles could be obtained using MA for 10 min and MM for 2 h. The composite prepared through MA indicated a high relative density but low thermal conductivity due to its defects, such as damaged particles, Fe impurity, and local interfacial debonding, which were mainly introduced in the MA process. In contrast, the composite made by MM for 2 h demonstrated high relative density and an excellent thermal conductivity of 325 W.m^-1.K^-1, owing to its having few defects and strong inter-facial bonding.

关键词： metal matrix composites thermal properties sintering powder mixing