Materials Literature
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采用化学气相浸渗/反应法（CVI/CVR）在C/C复合材料表面制备MoSi2-SiC防氧化涂层。首先,制备多孔金属Mo层,然后以甲基三氯硅烷（MTS）为前驱体,利用CVI/CVR技术制备MoSi2-SiC复合涂层。采用XRD、SEM技术研究MoSi2-SiC复合涂层的制备机理,并考察涂层样品的抗氧化性能。结果表明,MTS分解的SiC填充了多孔金属Mo层中的孔隙,并与金属Mo发生反应,制备出致密的MoSi2-SiC复合涂层;在优化工艺条件下所得到的涂层样品在1500°C空气中氧化80h后质量损失仅为1.25%。
Li+ 和 Eu3+ 共同做 YPO4 空 microspheres 是被一个牺牲的模板方法成功地用聚苯乙烯(PS ) 综合模板。X 光检查衍射(XRD ) 的技术，扫描电子显微镜学(SEM ) ，以及传播电子显微镜学(TEM ) 被采用描绘同样综合的样品。而且， Li+ 和 Eu3+ 的光致发光(PL ) 描述共同做 YPO4 microsphere 被执行并且 Li+ 和 Eu3+ 的做的集中的效果 PL 性质上的活跃中心集中以及锻烧温度详细被学习。结果证明进 YPO4 的 Li+ 离子的加入:Eu3+ 格子能导致 PL 紧张的显著改进。最高的排放紧张与 5%Li+ 和 5%Eu3+ 的混合物被观察共同做的 YPO4，其亮度被…
长期以来,加氢装置中的加氢反应器等核心设备使用的主体材料——21/4Cr-1Mo厚钢板一直依赖进口,价格高,交货周期长,经常成为制约项目建设的瓶颈。为此,中国石化集团组织成立了150 mm厚度级21/4Cr-1Mo厚钢板国产化攻关课题组。从研制技术条件的编制、钢板生产工艺的确定、研制钢板的性能、研制钢板的评审和依托项目的确定、依托项目情况、后续钢板性能、设备制造和阶段性评审、新进展等方面对整个开发过程做了较详尽的介绍,并就该项目成功开发带来的益处进行了总结。
Цель. Современной тенденцией в эксплуатации свинцово-кислотных батарей является переход на использование надежных и безопасных герметизированных VRLA-батарей. Однако, свойства сплавов токоотводов этих батарей еще недостаточно изучены. Это тормозит применение их в ж/д транспорте. Целью работы является исследование зави…
A thermally induced shotcrete spalling in-situ experiment will be carried out during 2013 in the ONKALO rock characterization facility on the west coast of Finland. In the technical areas of the planned spent nuclear fuel repository there will be shotcreted rock spaces which will be subjected to thermally induced defo…
从锅炉部件制造角度，探讨和分析了DL／T438—2009《火力发电厂金属技术监督规程》中“硬度控制”规定在工程应用时的理解与执行问题并建议在DL/T438—2009的“规范性附录C”增加注释以阐明硬度值参考性原则，同时对部分材料的硬度控制范围进行微调。
In article ways definitions of places of corrosion of metal on underground and underwater pipelines of municipal services by a contactless method and the offer of increase of firmness of metal to the corrosion, protected by patents of the Russian Federation for the invention are given.
In the article presents results of evaluation bearing capacity for three cast concrete thickeners and basic design formulas to check their building structures strength and crack resistance with the influence of carbon plastic reinforcement.
以离子液体1-烯丙基-3-甲基咪唑氯盐（[AMIM]Cl）为溶剂制备不同质量分数的明胶溶液,利用HAAKE RheoStress RS75流变仪测定溶液的复数黏度（η＊）、弹性模量（G′）和黏性模量（G″）来研究明胶溶液质量分数和温度对明胶/[AMIM]Cl溶液流变性能的影响规律。结果表明,明胶/[AMIM]Cl溶液G′和G″均随着频率（f）的增大而增大;随着明胶溶液质量分数的增大,η＊和G″呈增大的趋势,而G′不变;随着温度的升高,η＊和G″均减小,而G′不变。
The present study concerns compressive failure of glass fibre NCF composite laminates. The objectives of the study are firstly to give insight into the mechanisms leading to failure, and secondly t ...
采用传统的熔炼工艺制成Mg．10Al-1．5Zn-0．4Mn—xCa镁合金铸锭并经挤压变形，借助OM、SEM和XRD分析了合金显微组织和相组成，研究了Ca对该镁合金铸态和挤压态显微组织和力学性能的影响
Background: Particularly important to the mechanical performance of native arterial blood vessels is elastin, an extracellular matrix (ECM) protein deposited by VSMCs in the form of elastic fibers, arranged in concentric lamellae in the media of the vessel wall. In addition to serving as major structural elements of a…
por ejemplo, el uso como supercapacitores en el campo de la electrónica
The study of mechanics of deformation of a cylindrical shell is important because such shells are widely used in mechanical engineering and many of them are subject to local loadings. When designing thin-walled structures, the local loading on a shell is often approximated by a concentrated force. This can be explaine…
In this study, the composition and stability constants of a mixed ligand complex of Sc(III), Y(III) and La(III) ion by using NTA (H 3 B) (Nitrilotriacetic acid) and HEDTA (H 3 B) (N-(2-hydroxyethyl)ethylenedinitrilotriacetic acid) as a primary ligand and 2,3-DHBA (H 3 A) (2,3-dihydroxybenzoic acid) as secondary ligand…
The basic properties of the 3 knitted fabrics are measured with different instruments.Testing standards are tensile,break drape,wear resistance,pilling property and bending properties.By the analysis of the results,the following conclusions can be deduced: Among the 3 fabrics,the mechanical properties of the blended k…
Reaction formed silicon carbide (RF-SiC) and reaction bonded silicon carbide (RB-SiC) are both fabricated with silicon infiltration as sintering process, in which silicon infiltrated into the porous template and reacted with the carbon in it to form silicon carbide. Although RF-SiC has been invented by Hucke for more…
采用特性黏度为0.645dL/g的半消光PET熔体直接纺丝、利用双头纺工艺生产2-83 dtex/36 f扁平涤纶FDY.结果表明：采用喷丝板孔长为1.6 mm,孔宽为0.12 mm,油嘴上油,纺丝温度287℃,纺丝速度1 900 m/min,环吹风风压40Pa,拉伸温度92℃,拉伸倍数2.3 ～2.5,卷绕速度4400 m/min,生产的扁平涤纶FDY条干不匀率为1.32％,沸水收缩率7.3％,产品染色均匀度大于4级,扁平度4.82,利用双头纺工艺倍增了产能.
The article presents a mathematical model referring the interaction between sound waves localized in two dislocations of the piezoelectric crystal. The frequencies for the normal vibrations of the system have been found, and an approximate expression was deduced for the wave energy localized on each of the dislocation…
The aim of this work is to justify the use of developed finite element models to assess the strength and stiffness of structures being designed and developed. For this purpose, it is necessary to compare the results of computer simulation and strength tests. In this article, the numerical results obtained by using a f…