共查询到19条相似文献,搜索用时 171 毫秒
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超高强度铜基原位复合材料研究进展 总被引:2,自引:0,他引:2
形变铜基原位复合材料是一种很有应用前景的功能材料,其突出的特点是具有超高的强度和良好的导电性.本文综述了铜基原位复合材料的研究现状,介绍了该类材料的组织演变、强化和导电机理,对其制备工艺及综合性能进行了介绍,并阐述了该类材料的发展方向. 相似文献
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形变铜基原位复合材料具有超高的强度和良好的导电性,是高性能铜基材料发展的重要方向。综述了形变铜基原位复合材料的国内外研究现状,介绍了它的制备方法、组织演变、强化和导电机理,并对该类材料的研究方向进行了展望。 相似文献
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Cu-Fe形变原位复合材料是一类极具工业规模制备和应用潜力的高强高导电铜基复合材料。对Cu-Fe系形变原位复合材料的制备工艺、组织结构、综合性能进行了综述,并基于该类材料研究的关键科学问题展望了研究方向。 相似文献
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高强度、高导电铜合金及铜基复合材料研究进展 总被引:18,自引:9,他引:18
概述了高强度、高导电铜合金及铜基复合材料的研究现状,介绍了此类材料的强化机理、制备方法、组织、性能特点,指出:传统析出强化型铜合金具有较高的强度和导电性,且制备工艺较简单,适于用作各类电连接器件材料,今后此类材料应注重综合利用各种强化手段和多元合金化,以提高性能,降低成本;弥散强化铜(DSC)在高温应用领域有显著优势,但存在工艺复杂、性能不稳定等问题;形变铜基复合材料具有较前两者更为优异的性能,代表了高强度、高导电铜基导电材料的发展方向,但制备工艺复杂,应用受到限制。 相似文献
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《热处理技术与装备》2021,42(3)
铜及其合金在实际应用中稳定性差且强度相对较低。石墨烯作为一种由碳原子杂化的二维层状材料,具有较高的强度、良好的导电导热性能,是一种极具潜力的纳米级铜基材料增强体。本文基于石墨烯在铜基材料中的应用研究现状,概述了石墨烯铜基复合材料的常用制备工艺,并对其优缺点进行了分析;综述了石墨烯铜基复合材料的有效分散、界面结合和结构设计等关键技术,对石墨烯增强铜基复合材料研究存在的问题和发展方向进行了总结和展望。 相似文献
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Hezhou Ye Xing Yang Liu Hanping Hong 《Journal of Materials Processing Technology》2008,200(1-3):12-24
Metal injection molding (MIM) is a near net-shape manufacturing technology that is capable of mass production of complex parts cost-effectively. The unique features of the process make it an attractive route for the fabrication of metal matrix composite materials. In this paper, the status of the research and development in fabricating metal matrix composites by MIM is reviewed, with a major focus on material systems, fabrication methods, resulting material properties and microstructures. Also, limitations and needs of the technique in composite fabrication are presented in the literature. The full potential of MIM process for fabricating metal matrix composites is yet to be explored. 相似文献
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Wear is a major problem in many industrial applications, and the development of wear-resistant materials is therefore both
a technical and an economic advantage. Iron-base composites bring new possibilities into the production of wear-resistant
materials because of their high hardness and sufficient fracture toughness. They are suitable replacements for the conventional
WC/Co cermets owing to their lower fabrication cost, better machinability, weldability, and corrosion resistance. In this
study, hot-work steel/Cr3C2 composites and reference wear-resistant materials were produced by hot isostatic pressing. It was found that the matrix powder
size used during processing did not affect the resultant wear properties of the composite. On the other hand, the impact toughness
increased when fine matrix powders were used. The increasing reinforcement volume fraction increased significantly the hardness
and wear resistance of the composite; however, the impact resistance decreased. The newly proposed hot-work steel/30 vol%
Cr3C2 composite demonstrated a better combination of properties than some of the most abrasion-resistant materials available today. 相似文献
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Sylvia M. Johnson Yigal Blum Christine Kanazawa Hui-Jung Wu 《Metals and Materials International》1998,4(6):1119-1125
Continuous oxide fiber/oxide matrix composites are attractive for use as high temperature structural materials because they
can combine composite properties with long-term oxidative stability. The development of a matrix for such a composite and
prevention of matrix-fiber coating interaction is described here. The goal use temperature of this composite is 1100°C to
1200°C. The composite is being developed by the M C Consortium comprising 3M, Rockwell International, and SRI International.
The composite consists of an alumina-based woven-tow fiber preform, coated with lanthanum phosphate (monazite) to promote
fiber debonding and pullout, in an oxide matrix derived from a preceramic-polymer slurry filled with active and inert powders.
This approach to the matrix enables conventional polymer matrix composite technology to be used in composite part fabrication.
Only one infiltration of the matrix is required, a critical factor in keeping the cost low. 相似文献
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低压浸渗法制备Gr(C)/Mg复合材料 总被引:2,自引:0,他引:2
对用低压浸渗法制备石墨(碳)长纤维镁基复合材料进行了研究。结果表明,制备工艺条件对复合状况、界面反应及复合材料性能均有明显影响。通过纤维表面SiO2涂层处理和优化浸渗工艺,可成功地制备出高性能的复合材料,拉伸断裂强度可达509MPa,模量亦可达142GPa。 相似文献
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Sunil G. Warrier M.S. Ray Y. Lin Sc.D. 《JOM Journal of the Minerals, Metals and Materials Society》1993,45(3):24-27
Control of the fiber-matrix reaction during composite fabrication is commonly achieved by shortening the processing time, coating the reinforcement with relatively inert materials, or adding alloying elements to retard the reaction. To minimize the processing time, a rapid infrared forming (RIF) technique for metal-matrix composite fabrication has been developed. Experiments have shown that the RIF technique is a quick, simple, and low-cost process to fabricate titanium-alloy matrix composites reinforced with either silicon carbide or carbon fibers. Due to short processing times, typically on the order of 1–2 minutes in an inert atmosphere for composites with up to eight-ply reinforcements, the interfacial reaction is limited and well controlled. Composites fabricated by this technique have mechanical properties that are either comparable to or, in several cases, superior to those made with conventional diffusion-bonding techniques. 相似文献
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激光原位制备复合碳化物颗粒增强铁基复合涂层及其耐磨性的研究 总被引:4,自引:0,他引:4
通过在高碳当量铁基熔覆粉末中复合添加多种强碳化物形成元素,激光原位制备的颗粒增强铁基复合材料涂层具有颗粒析出密度大、尺寸分布均匀的优点.通过在铁基熔覆粉末中单独添加Ti,复合添加Ti+Zr以及Ti+Zr+WC的方式,运用激光熔覆技术在中碳钢表面制备了颗粒增强铁基复合涂层.用X射线衍射仪、扫描电镜和透射镜等手段研究了涂层的显微组织、颗粒相结构及颗粒相与熔覆层基体相之间的界面.通过环块磨损实验,对比渗碳淬火工艺研究了颗粒增强涂层的耐磨性能,并对磨损机制进行了讨论.结果表明,涂层微观结构是典型的亚共晶介稳组织,原位合成的颗粒是一种复合碳化物,界面处结合牢固.激光原位制备复合碳化物颗粒增强铁基复合涂层具有优异的耐磨性能. 相似文献
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Tungsten composites face severe challenges in machining complex structures due to tungsten's high melting temperature. To explore solutions that enable fabrication of complex W composite parts by additive manufacturing, W-6Ni-2Fe-2Co (W90), W-12Ni-4Fe-4Co (W80) and W-18Ni-6Fe-6Co (W70) composites were consolidated by selective laser melting (SLM). The effects of laser process parameters and chemical compositions on densification, microstructures, phases, and tensile properties were investigated. With the increase of laser energy density, the density of the composite increases. Near full density with an absence of cracks and pores was achieved in the SLM-processed W70 composites. The typical microstructure consisted of un melted polyhedral W particles and the surrounding W-Ni-Fe-Co matrix with W dendrites. Alternating layered fine dendrite and coarse dendrite zones were visible in side views of the composites. The tensile properties of the W70 composite had a pronounced improvement with the increase of laser energy density. A maximum ultimate tensile strength of 1198 MPa was obtained in the SLM-processed W70 composite with elongation of 9.5%. The SLM-processed W-Ni-Fe-Co composites pave the way for new refractory metal alloys and complex shaped parts fabrication by additive manufacturing. 相似文献
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镁基复合材料的制备方法与新工艺 总被引:4,自引:0,他引:4
综述了镁基复合材料的不同制备方法,尤其是对一些新型制备方法进行了着重介绍,针对性地分析了不同制备工艺对复合材料组织、结构、性能的影响,提出了今后镁基复合材料研究重点是开发新型增强相材料与原位反应合成技术、优化现有制备工艺、大规模制备高性能镁基复合材料. 相似文献
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The newly methods of material production based on electrical pulse utilised for metal matrix composites preparation, interest and attracts due to possibilities of sintering of a wide range of materials to high densities in a short time period at relatively low temperatures. Advantages of this approach allow avoiding the grain growth and lead to more precise control of final material properties also by the starting precursor choice. Morphology, grain size and purity of precursor, connected with it physical properties and chemical composition that is next submitted to the process parameters could reveal subtle dependence in microstructure and densification mechanism in obtained composite sinters. Ultrafast electric pulse consolidation allows to obtained the in situ Ti/TiB metal matrix composites due to reaction mechanism kinetics, focusing however on heating rate and energy availability. Specific heating conditions for Pulse Plasma Sintering process used to consolidate the precursor material with a high-current pulse approach correlate with final obtained properties. 相似文献