美国混凝土硫酸盐侵蚀试验方法评析

指出混凝土硫酸盐侵蚀破坏的本质与其暴露条件如持续浸泡、干湿交替、溶液pH值、质量分数和温度相关．在阐明混凝土硫酸盐侵蚀反应类型和侵蚀机理的基础上，分析实验室5种硫酸盐试验加速途径，评述美国现行5种硫酸盐侵蚀试验方法，指出现行硫酸盐侵蚀试验方法，在测试时间、侵蚀破坏指标、多因素分析和模拟现场侵蚀破坏的有效性方面需要改进．     

Fabrication and properties of ZAO powder, sputtering target materials and the related films

Aluminum-doped zinc oxide （ZnO：Al）, abbreviated as ZAO, is a novel and widely used transparent conductive material. The ZAO powder was synthesized by chemical coprecipitation. The ZAO ceramic sputtering target materials were fabricated by sintering in air, and ZAO transparent conductive films were prepared by RF magnetron sputtering on glass substrates. XRD proved that such films had an orientation of （002） crystal panel paralleled to the surface of the glass substrate. The average transmittance of the films in the visible region exceeded 80%.     

等离子喷涂W-Cu电子封装材料的组织与性能

采用等离子喷涂工艺制备了W-Cu电子封装材料，并对该电子封装材料的微观组织和热物理性能进行了研究．结果表明，在内部送粉条件下，复合材料中钨的收得率要高于外部送粉条件下复合材料中钨的收得率；在内部送粉条件下，功率对铜氧化的影响并不明显；而在外部送粉条件下，随着功率的提高，铜的氧化明显增多；由于氧化物和孔隙等的存在，利用大气等离子喷涂工艺制备的复合材料的导热率远远低于根据混合法则计算的理论值．这为后续实验研究提供了重要的参考依据．     

聚合物的水声声衰减能力与动态力学性能的关系

以描述高分子材料粘弹行为的三元模型为出发点,以声波在高分子介质中的传播理论为依据,推导出了材料的水声声衰减能力与材料的动态力学性能参数包括损耗因子、松弛前的剪切模量、松弛后的剪切模量以及材料的密度和厚度之间的关系式。为实验验证所推导的关系式,设计合成了一系列阻尼性能不同的聚合物,分别测试了它们的动态力学性能和声衰减能力。用材料的动态力学性能参数计算得到的水声声衰减系数与实验测得的声衰减能力相符合。该数学模型为找出吸声系数与材料的动态力学性能之间的关系、指导水声材料设计奠定了基础。     

基于PLC的配料计量装置的设计

冶金生产中，各种原料之间的配比精度对生产过程的稳定和产品的质量有重要的影响。目前使用的配料系统计量精度低，瞬时物料流量波动大，系统复杂。本文介绍的计量装置的计量过程是对料斗内物料的减少量进行计量，以减重秤为主，配料精度达到0．5％级。     

回转式精炼炉炉口砌筑工艺改进

针对葫芦岛东方铜业有限公司120吨回转式精炼炉口出现炉口掉砖问题，对耐火材料及其砌筑工艺进行探讨和改进。     

A non‐linear programming approach to kinematic shakedown analysis of composite materials

Using a Representative volume element (RVE) to represent the microstructure of periodic composite materials, this paper develops a non‐linear numerical technique to calculate the macroscopic shakedown domains of composites subjected to cyclic loads. The shakedown analysis is performed using homogenization theory and the displacement‐based finite element method. With the aid of homogenization theory, the classical kinematic shakedown theorem is generalized to incorporate the microstructure of composites. Using an associated flow rule, the plastic dissipation power for an ellipsoid yield criterion is expressed in terms of the kinematically admissible velocity. By means of non‐linear mathematical programming techniques, a finite element formulation of kinematic shakedown analysis is then developed leading to a non‐linear mathematical programming problem subject to only a small number of equality constraints. The objective function corresponds to the plastic dissipation power which is to be minimized and an upper bound to the shakedown load of a composite is then obtained. An effective, direct iterative algorithm is proposed to solve the non‐linear programming problem. The effectiveness and efficiency of the proposed numerical method have been validated by several numerical examples. This can serve as a useful numerical tool for developing engineering design methods involving composite materials. Copyright © 2005 John Wiley & Sons, Ltd.     

多孔材料孔径及孔径分布的测定方法

孔径及其分布显著影响着多孔体的透过性、渗透速率、过滤性等一系列性能。本文介绍多孔材料孔径及其分布的常用测定方法，包括断面直接观测法、气泡法、透过法、压汞法、气体吸附法、液．液法、悬浮液过滤法、X射线小角度散射法等，并对几种测量方法进行了比较。     

Recent Progress in the Synthesis of Porous Carbon Materials

In this review, the progress made in the last ten years concerning the synthesis of porous carbon materials is summarized. Porous carbon materials with various pore sizes and pore structures have been synthesized using several different routes. Microporous activated carbons have been synthesized through the activation process. Ordered microporous carbon materials have been synthesized using zeolites as templates. Mesoporous carbons with a disordered pore structure have been synthesized using various methods, including catalytic activation using metal species, carbonization of polymer/polymer blends, carbonization of organic aerogels, and template synthesis using silica nanoparticles. Ordered mesoporous carbons with various pore structures have been synthesized using mesoporous silica materials such as MCM‐48, HMS, SBA‐15, MCF, and MSU‐X as templates. Ordered mesoporous carbons with graphitic pore walls have been synthesized using soft‐carbon sources that can be converted to highly ordered graphite at high temperature. Hierarchically ordered mesoporous carbon materials have been synthesized using various designed silica templates. Some of these mesoporous carbon materials have successfully been used as adsorbents for bulky pollutants, as electrodes for supercapacitors and fuel cells, and as hosts for enzyme immobilization. Ordered macroporous carbon materials have been synthesized using colloidal crystals as templates. One‐dimensional carbon nanostructured materials have been fabricated using anodic aluminum oxide (AAO) as a template.