材料期刊网

THE PROPERTIES OF SILICA FUME MAGNESIUM OXYCHLORIDE CEMENT MATERIALS

H.F.Yu 1) , P.Q.Liu 1) and W.H.Wang 2) 1) Department of Materials Science and Engineering , Shenyang Architectural and Civil Engineering Institute , Shenyang 110015 , China 2) Department of Airport , CAAC Eastnorth Management , Shenyang 110043 , China

金属学报(英文版)

The properties of a new magnesium Oxychloride cement (MOC) material formed by silica fume uniformly mix in MOC paste was presents. The influence of silica fume on the water resistance and compressive strength of MOC paste was invesigated in this study. It is shown that when 30 weight percent of silica fume is added to the MOC paste, a high strength and water resisting new material with 112MPa compressive strength and 1 00 water resisting coefficient could by obtained.

关键词: silica fume , null , null , null

Going global Management of colour-measuring instrumentation is the key to successful colour management

涂料工业 doi:10.3969/j.issn.0253-4312.2007.z1.009

关键词:

Thermal conductivity behavior of SPS consolidated AIN/Al composites for thermal management applications

稀有金属（英文版） doi:10.1007/s12598-011-0222-8

关键词:

光致发光聚乙烯膜的制备与表征

黄子群 , 张怀红 , 刘传芳

稀土 doi:10.3969/j.issn.1004-0277.2009.04.005

以铕(Ⅲ)氯化物、乙酰丙酮、2,2联吡啶为原料合成了Eu(Caac)3BIPY配合物,用元素分析、红外、紫外-可见对它进行表征,然后将配合物掺杂到低密度聚乙烯的四氢呋喃(THF)溶液中,制备光致发光聚乙烯膜,研究了它的红外光谱,紫外光谱及荧光性质.研究结果表明,铕配合物含量在1.75%时荧光强度最强.

关键词: 聚乙烯膜 , 乙酰丙酮 , 2,2联吡啶

DEVELOPMENT OF THE RISK-BASED MAINTENANCE OPTIMIZATION SYSTEM FOR FOSSIL POWER PLANTS

D.Watanabe

金属学报(英文版)

Cost reduction in electric power generation is a major management concern, and it is therefore necessary to reduce maintenance expenses while upholding plant reliability. A maintenance optimization system "FREEDOM", which uses RBM technique, DCF (discounted cash flow) and NPV (net present value) calculation functions, has been newly developed. This system probabilistically evaluates the lifetime of boiler and turbine and quantitatively calculates the risk defined as the cumulative probability of failure multiplied by the consequence of failure. Economically optimized timing of inspection and alternative countermeasure such as repair and replacement are then recommended. This system has already been applied to seven plants in Japan, and its effectiveness has been confirmed.

关键词: plant asset management , null , null

APPLICATION OF THE UNIFIED STATISTICAL MATERIAL DATABASE FOR DESIGN AND LIFE／RISK ASSESSMENT OF HIGH TEMPERATURE COMPONENTS

K.Fujiyama

金属学报(英文版)

Statistical manipulation of material data was conducted for probabilistic life assessment or risk-based design and maintenance for high temperature components of power plants. To obtain the statistical distribution of material properties, dominant parameters affecting material properties are introduced into normalization of statistical variables. Those parameters are hardness, chemical composition, characteristic microstructural features and so on. Creep and fatigue properties are expressed by normalized parameters and the unified statistical distributions are obtained. These probability distribution functions show good coincidence statistically with the field database of steam turbine components. It was concluded that the unified statistical baseline approach is useful for the risk management of components in power plants.

关键词: statistical analysis , null , null

太阳电池用绒面结构ZnO-TCO薄膜及光管理研究进展

陈新亮 , 田淙升 , 赵慧旭 , 杜建 , 张德坤 , 魏长春 , 耿新华 , 赵颖 , 张晓丹

材料导报

主要阐述了近年来薄膜太阳电池用绒面结构氧化锌(ZnO)透明导电氧化物(Transparent conductiveoxides,TCO)薄膜以及光管理设计方面的研究进展.主要包括溅射&湿法刻蚀技术、等离子体刻蚀玻璃衬底技术、等离子体处理修饰ZnO薄膜表面技术、修饰层改善ZnO薄膜表面技术、梯度杂质掺杂技术、复合特征尺寸生长设计以及直接生长绒面结构ZnO薄膜技术和宽光谱ZnO薄膜生长设计等.此外,对薄膜太阳电池中的先进光管理(Light management)结构设计及新材料应用进行了探讨和展望.

关键词: 太阳电池 , 绒面结构 , ZnO-TCO薄膜 , 光管理 , 薄膜技术

Metal-Free Heterogeneous Catalysis for Sustainable Chemistry

Chemsuschem

The current established catalytic processes used in chemical industries use metals, in many cases precious metals, or metal oxides as catalysts. These are often energy-consuming and not highly selective, wasting resources and producing greenhouse gases. Metal-free heterogeneous catalysis using carbon or carbon nitride is an interesting alternative to some current industrialized chemical processes. Carbon and carbon nitride combine environmental acceptability with inexhaustible resources and allow a favorable management of energy with good thermal conductivity Owing to lower reaction temperatures and increased selectivity, these catalysts could be candidates for green chemistry with low emission and an efficient use of the chemical feedstock This Review highlights some recent promising activities and developments in heterogeneous catalysis using only carbon and carbon nitride as catalysts The state-of-the-art and future challenges of metal-free heterogeneous catalysis are also discussed.

关键词: carbon;catalyst;heterogeneous catalysis;selectivity;sustainable;chemistry;graphitic carbon nitride;modified activated carbon;nanofiber/graphite-felt composite;ordered mesoporous carbons;oxygen;reduction reaction;nitrogen-doped graphite;fuel cell cathode;onion-like carbon;oxidative dehydrogenation;hydrogen-production

Life Cycle Assessment of Internal Recycling Options of Steel Slag in Chinese Iron and Steel Industry

CHEN Bo , YANG Jian-xin , OUYANG Zhi-yun

钢铁研究学报(英文版)

The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel industry was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment (LCA) as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental impacts and resources burdens for each scenario. The global warming potential (GWP) results of the four scenarios show that the scenario which performs best in carbon reduction cuts off 14.2% of GWP impacts of the worst scenario. The results of this study show that the optimized internal recycling process of BOF slag can improve the environmental performance of crude steel. It is important to assess and choose an appropriate strategy to recycle BOF slag from LCA perspective to reduce the environmental impacts and resource burdens as much as possible.

关键词: life cycle assessment , sustainable development , close-loop recycling , steel , BOF slag

A NEURAL NETWORK-BASED MODEL FOR PREDICTION OF HOT-ROLLED AUSTENITE GRAIN SIZE AND FLOW STRESS IN MICROALLOY STEEL

J. T.Niu , L.J.Sun and P.Karjalainen 1) Harbin Institute of Technology , Harbin 150001 , China 2) University of Oulu , FIN-90571 , Oulu , Finland

金属学报(英文版)

For the great significance of the prediction of control parameters selected for hot-rolling and the evaluation of hot-rolling quality for the analysis of prod uction problems and production management, the selection of hot-rolling control parameters was studied for microalloy steel by following the neural network principle. An experimental scheme was first worked out for acquisition of sample data, in which a gleeble-1500 thermal simolator was used to obtain rolling temperature, strain, stain rate, and stress-strain curves. And consequently the aust enite grain sizes was obtained through microscopic observation. The experimental data was then processed through regression. By using the training network of BP algorithm, the mapping relationship between the hotrooling control parameters (rolling temperature, stain, and strain rate) and the microstructural paramete rs (austenite grain in size and flow stress) of microalloy steel was function appro ached for the establishment of a neural network-based model of the austeuite grain size and flow stress of microalloy steel. From the results of estimation made with the neural network based model, the hot-rolling control parameters can be effectively predicted.

关键词: microalloy steel , null , null , null , null , null