共查询到20条相似文献,搜索用时 31 毫秒
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综述了纤维增韧陶瓷基复合材料界面的研究现状,分析了现有的界面相的结构、界面结合类型和界面结合的机理,对碳纤维制备界面涂层方法进行了归纳总结,分析了目前碳纤维增韧陶瓷基复合材料界面材料的功能和要求,指出了今后碳纤维增韧陶瓷基复合材料界面材料发展的研究方向。 相似文献
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The state-of-the-art technology on the carbon fibre reinforced aluminium matrix composites is reviewed. The available raw material, various fabrication techniques along with their effects on the properties of the composites produced and the manufacturing problems encountered are described in detail. General trends are outlined and further research and development work on composites containing pitch base carbon fibres in a matrix of high strength aluminium alloy is recommended. 相似文献
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本文综述了碳纤维在铜基复合材料中的作用及其表面处理技术的发展现状。总结了近年来碳纤维表面改性方法以及存在的主要问题,分析了碳纤维对铜基复合材料组织的形成及其性能的影响。最后展望了碳纤维的发展前景。 相似文献
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碳纤维增强陶瓷基复合材料界面的研究进展 总被引:2,自引:0,他引:2
界面相作为复合材料基本组元之一,其结构组成与性能对材料的性能有着极其重要的影响.综述了碳纤维增强陶瓷基复合材料界面相的功能要求、界面结合类型.阐述了界面相厚度对复合材料性能的影响,适当的界面厚度有利于复合材料获得最佳性能.重点介绍了目前碳纤维表面涂层工艺的研究现状,并分析了各种制备工艺的优缺点.最后指出了今后碳纤维增强陶瓷基复合材料界面的研究方向. 相似文献
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Josef P. Kaufmann Frank Winnefeld Daniela Hesselbarth Walter Trindler 《Materials and Structures》2006,39(6):645-654
The rheological properties of fresh concrete, mortar or cement paste are among the most important parameters when cementitious
building materials are placed. New material designs, like high or ultrahigh performance concretes, include the addition of
a high volume of fibers to the fresh mix influencing its workability properties. However, the analysis of the rheological
properties of fiber reinforced cementitious composites is difficult. Conventional methods mostly do not apply, especially
when a high fiber content and relatively stiff mixtures are used. For this reason, a new method was developed to evaluate
the workability of fiber reinforced composites. This method was applied to carbon and PVA fiber reinforced high performance
composites and was used to optimize the rheological properties of these composites for an application in a centrifugation
casting process. 相似文献
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Composites have set the standard for high strength materials for several decades. With the discovery of nanotubes, new possibilities for reinforced composites have arisen, with potential mechanical properties superior to those of currently available materials. This paper reports the properties of epoxy matrix reinforced with fibres of carbon nanotubes (CNTs) which, in many ways, are similar to standard composites reinforced with commercial fibres. The composites were formed by the back diffusion of the uncured epoxy into an array of aligned fibres of CNTs. The fibre density and volume fraction were measured from thermogravimetric analysis (TGA). Properties in tension and compression were measured, and the level of fibre–matrix interaction analysed fractographically. The results show the significant potential for this route to CNT reinforcement. 相似文献
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D. Buttinelli 《Advanced Performance Materials》1994,1(2):183-195
Research projects on innovative structural materials carried out at the University La Sapienza of Rome in the last years are described. Problems, objectives and future developments are reported on new Al-Li-Mg-Ce alloys, SiC reinforced titanium and aluminum composites, ceramic composites for fuel engines, structural polymer composites, modelling and simulation procedures with new experimental testing methods for composite components.Particularly, Al-Li (2–2.8%)–Mg(2%)–Ce(0.5–0.8%) alloys were studied for their very low density (less than 2.5 kg/d3), and good mechanical properties, especially fatigue resistance, and reasonable production cost.Plasma spray technique was used to produce SiC-fiber reinforced titanium alloys (Ti-6AI-4V), or pure aluminium, matrices. Squeeze-casting method was also used for SiC-particles reinforced aluminium alloys composites.As new synthetic ceramics, SiC-additivated Al2O3–MgO (ZrO2, Y2O3) were prepared for fuel engines applications. For testing of this material a new high pressure fretting wear rig was developed.Curing agents for epoxy resin matrices were examined from the point of view of mechanical properties and durability of glass, or carbon, reinforced polymer composites. In testing of materials, especially structural composite components, new methods based on acoustic emission, image analysis, thermography (for polymer composites), ultasonic waves etc. were joined to classical tensile or impact tests to evaluate the damage intensity in real time. Al-electrocoated stainless steels and Superalloys were studied for high temperature oxidation and thermal cycling resistance.Beta-metastable titanium alloys were also examined. 相似文献
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Fibre Reinforced Composite Materials. The basic principles of the reinforcing and stiffening effect of fibers in composite materials as well as the failure behaviour of composites are discussed for composites which are reinforced with unidirectionally arranged continuous fibers, with short fibers and with multidirectionally arranged fibers. The most candidate continuous fiber materials for high performance composites which are presently available such as carbon fibers, boron- and silicon carbide fibers, organic fibers and fiberglass are compared with respect to properties and price. Whiskers are considered to have only very limited significance as reinforcing material. Furthermore the paper presents the most candidate fiber/matrix-combinations such as boron-, carbon-, organic- and glassfiber reinforced polyimide- and phenolic resin, boron- and carbon fiber reinforced aluminium, carbon- and SiC-fiber reinforced glass as well as carbon/carbon composites. The problems of chemical compatibility between fiber and matrix and the mechanical properties of these composites at room temperature and at elevated temperature are shown and discussed. 相似文献
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用交流阻抗法研究碳纤维混凝土导电性 总被引:1,自引:0,他引:1
随着水泥基材料的发展 ,人们对水泥基材料提出的更新的要求 ,其中水泥基导电复合材料的研究引起了广泛的兴趣。制备水泥基导电复合材料的方法是在水泥基材料中掺入各种导电组分 ,目前较常用的是掺入碳纤维 ,它不仅可以大幅度提高水泥基复合材料的电导率 ,还能够改善水泥基材料的力学性能、增加其韧性。本研究主要通过对碳纤维混凝土的交流阻抗谱进行分析 ,研究其导电性能与内部微结构的关系。 相似文献
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Du-qing Cheng Xue-tao Wang Jian Zhu Dong-hua Qiu Xiu-wei Cheng Qing-feng Guan 《Frontiers of Materials Science in China》2009,3(1):56-60
A new composite brake material was fabricated with metallic powders, barium sulphate and modified phenolic resin as the matrix
and carbon fiber as the reinforced material. The friction, wear and fade characteristics of this composite were determined
using a D-MS friction material testing machine. The surface structure of carbon fiber reinforced friction materials was analyzed
by scanning electronic microscopy (SEM). Glass fiberreinforced and asbestos fiber-reinforced composites with the same matrix
were also fabricated for comparison. The carbon fiber-reinforced friction materials (CFRFM) shows lower wear rate than those
of glass fiber- and asbestos fiber-reinforced composites in the temperature range of 100°C-300°C. It is interesting that the
frictional coefficient of the carbon fiber-reinforced friction materials increases as frictional temperature increases from
100°C to 300°C, while the frictional coefficients of the other two composites decrease during the increasing temperatures.
Based on the SEM observation, the wear mechanism of CFRFM at low temperatures included fiber thinning and pull-out. At high
temperature, the phenolic matrix was degraded and more pull-out enhanced fiber was demonstrated. The properties of carbon
fiber may be the main reason that the CFRFM possess excellent tribological performances. 相似文献