共查询到18条相似文献,搜索用时 674 毫秒
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重点介绍了原位颗粒增强镁基复合材料的制备技术、原位增强体的形成机制、增强机理和原位镁基复合材料的力学性能等研究热点问题并展望了原位颗粒增强镁基复合材料的发展趋势。 相似文献
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《中国新技术新产品》2016,(15)
颗粒增强镁基复合材料凭借其优良的比强度、比刚度、耐磨性、耐高温、减震性能以及优异的阻尼性能和电磁屏蔽性能等,作为功能材料被广泛地应用在电子、航空、航天特别是汽车工业等行业中。本文主要对颗粒增强镁基复合材料专利申请中专利申请的国内外的年度变化趋势、申请人类型进行分析,并总结了颗粒增强镁基复合材料专利申请中增强颗粒类型以及其专利技术改进方向。 相似文献
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颗粒增强铝基复合材料具有较好的比刚度、比强度、抗疲劳、耐热耐磨和辐射屏蔽等优点,广泛应用于航空航天、军工、电子和汽车等领域。在这类材料中,基体-增强体界面的结构与性能对复合材料宏观性能影响显著。综述了颗粒增强铝基复合材料主要的制备方法和应用现状,特别聚焦于界面的结构及其对复合材料宏观性能的影响方式与机制,同时指出了复合材料制备过程中各种因素对材料界面性质的影响。最后,展望了颗粒增强铝基复合材料界面性能研究的发展前景,指出可采用先进的微纳米尺度的测量技术,结合显微结构表征的方法,系统地研究界面性能与结构之间的关系。 相似文献
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纯镁基复合材料的阻尼性能 总被引:8,自引:0,他引:8
制备了以线了镁为基体,以混杂碳化硅颗粒和硅酸铝短纤维为增强物的一类特殊复合材料,了其阻尼性能,发现镁基复合材料的强度优于纯镁,但阻尼性能却降低了并随增强物含量增加,这种下降越大。镁基复合材料的阻尼民其状态关系密切,退火处理和热循环自理提高了复合材料的阻尼性能。 相似文献
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S. Kohara 《Materials and Manufacturing Processes》1990,5(1):51-62
Liquid phase fabrication methods for aluminum matrix composites reinforced with SiC whiskers, or SiC particles have been investigated and the mechanical properties of fabricated composites have been evaluated. Three kinds of liquid phase fabrication methods; hot extrusion, hot pressing and pressure infiltration, were studied. Commercial SiC whiskers and SiC powders of alpha type and beta type were used as the reinforcements for an aluminum matrix. Among the fabrication methods investigated, the best results were achieved by the pressure infiltration. The mechanical properties and the wear resistance of the fabricated composites were measured. The SiC whisker reinforced aluminum matrix composites have high strength, so that they can be used as high specific strength materials. The SiC particulate reinforced aluminum matrix composites are not strong as the SiC whisker reinforced composites. However, the SiC particulate reinforced aluminum matrix composites have a good potential for use as wear resistant material. The hardening effect of beta type particles on the aluminum matrix was larger than that of alpha type particles. 相似文献
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Magnesium alloys are very suitable for applications that require materials with high strength-to-weight ratio. However, the use of magnesium alloys is limited due to their low elevated temperature properties. Magnesium matrix composites are the possible alternatives. The present work involved the production and subsequent property evaluation of AM100 magnesium alloy and its alumina short fibre reinforced composites. Studies on microstructure, hardness, density, stiffness, tensile properties, impact strength, wear resistance and corrosion resistance were carried out. Results indicate the significant improvement in the properties achieved by making composites. The findings also highlight the dominant roles of the base alloy matrix and the fibre volume fraction in determining the above properties. 相似文献
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Haozhe Liu Aimin Wang Luhong Wang Ringzhe Ding Zhuangqi Hu 《Materials and Manufacturing Processes》1997,12(5):831-835
Nanoscale SiC particulate reinforced Ti matrix composites were successfully synthesized under high pressure. The reaction behaviour of the SiC particles and Ti matrix during fabrication processes was studied using XRD and TEM methods. The influence of pressure and temperature on the reaction was determined. The highly densified and well bonded SiC p/Ti composites can be fabricated without interaction by adjusting the production conditions. Their microhardnesses were measured. 相似文献
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本文在介绍Ti-Al金属间化合物基体及其颗粒增强剂的基础上,重点讨论了利用XD合成法、自蔓延高温合成法及真空热压法制造TiB2、SiC、Al2O3、TiNb等颗粒增强Ti-Al金属间化合物基复合材料的力学性能,同时还对颗粒增强Ti-Al金属间化合物基复合材料的其它制造方法,如反应热压烧结法、冲击波固结法、高能高速法的工艺、特点也进行了简要叙述。 相似文献
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《Materials Science & Technology》2013,29(6):670-674
AbstractAn understanding of the work hardening behaviour of particulate reinforced metal matrix composites is crucial in optimising the parameters for deformation processing of these materials. In the present study, SiC reinforced magnesium metal matrix composites were produced using a liquid phase process. The microstructure of the composite was characterised and the mechanical properties were determined. The results of the ambient temperature tensile testing on the extruded Mg and Mg/SiC specimens revealed that an increase in the weight percentage of SiC particulates in pure magnesium increases the elastic modulus, does not affect the 0·2% yield strength, and reduces the ultimate tensile strength and ductility. A modified continuum model was applied to relate the work hardening behaviour of the composites to microstructural parameters and to predict the fracture strain of the composites. The model is shown to predict the fracture strain of the composites quite accurately for all the three weight fractions of reinforcements evaluated in the present study. 相似文献
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Particulate reinforced metal matrix composites — a review 总被引:7,自引:0,他引:7
The physical and mechanical properties that can be obtained with metal matrix composites (MMCs) have made them attractive candidate materials for aerospace, automotive and numerous other applications. More recently, particulate reinforced MMCs have attracted considerable attention as a result of their relatively low costs and characteristic isotropic properties. Reinforcement materials include carbides, nitrides and oxides. In an effort to optimize the structure and properties of particulate reinforced MMCs various processing techniques have evolved over the last 20 years. The processing methods utilized to manufacture particulate reinforced MMCs can be grouped depending on the temperature of the metallic matrix during processing. Accordingly, the processes can be classified into three categories: (a) liquid phase processes, (b) solid state processes, and (c) two phase (solid-liquid) processes. Regarding physical properties, strengthening in metal matrix composites has been related to dislocations of a very high density in the matrix originating from differential thermal contraction, geometrical constraints and plastic deformation during processing. 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