共查询到19条相似文献,搜索用时 140 毫秒
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从硼纤维的基本性质和制备工艺等方面,综述了硼纤维增强铝基复合材料的复合工艺和性能特点,并简述硼纤维增强铝基复合材料的发展应用方向. 相似文献
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挤压铸造铝基复合材料 总被引:3,自引:0,他引:3
纤维增强铝基复合材料因其一系列的优点而受到人们的重视。本文利用挤压铸造技术制备铝基复合材料,讨论制备工艺对复合材料性能、结构的影响及工艺参数的最优化。结果表明.挤压铸造是一种简单而可靠的制备纤维增强铝基复合材料的工艺方法。 相似文献
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硅酸铝纤维增强铝基复合材料的抗拉强度及其影响因素 总被引:1,自引:0,他引:1
研究了基体合金化,硅酸铝纤维处理方法以及不同粘结剂对硅酸铝纤维增强的铝基复合材料室温强度的影响。结果表明:基体为ZL109铝合金的复合材料的强度高于以其它铝合金为基体的铝基复合材料;用莫来石硅酸铝纤维增强的铝基复合材料的抗位强度高于用γ型三氧化二铝纤维增强的铝基复合材料; 相似文献
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为了探究碳纤维对复合材料拉伸性能的影响,使用真空吸铸法制备了碳纤维增强铝基复合材料铸件并测试其拉伸性能,将实验所得数据结合Geodict软件分析了碳纤维含量和碳纤维长度对碳纤维增强铝基复合材料的应力、应变分布的影响规律,得到的模拟结果与实验数据吻合良好,为使用真空吸铸法制备碳纤维增强铝基复合材料的后续工作展开和性能提升提供了理论基础。结果表明,随着碳纤维含量的增加,纤维对材料拉伸性能的增强效果越好;随着碳纤维长度的增加,纤维对材料拉伸性能的增强效果逐渐减小,并在5 mm后达到平稳的趋势,当纤维长度为1 mm时,复合材料的拉伸性能较优。 相似文献
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汽车铝基复合材料的制备与性能 总被引:1,自引:0,他引:1
铝基复合材料具有优异的性能.介绍了铝基复合材料的发展过程、种类及其性能.综述了颗粒、晶须增强材料的制备方法.列举了常用颗粒增强体及晶须增强体的部分特性,指出了铝基复合材料应用潜力及妨碍铝基复合材料广泛应用的主要障碍. 相似文献
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针对连续碳纤维增强铝基复合材料(CF/Al复合材料),采用细观力学数值模拟与热性能试验结合的方法,研究了真空压力浸渗制备过程中的热收缩行为和热残余应力分布。结果表明,复合材料的横向热收缩应变量远大于轴向热收缩应变量,且具有横观各向同性,纤维随机分布的单胞有限元模型能够准确地预测复合材料轴向与横向热收缩行为曲线;复合材料制备完成后纤维和基体合金分别处于压应力和拉应力状态,基体和纤维的横向残余应力均小于其轴向残余应力,且均表现出横观各向同性;基体合金在轴向残余拉应力作用下会出现不同程度的损伤现象,特别是纤维间距较小部位过高的残余应力会引发界面的局部失效,从而不利于发挥复合材料承载性能,减少纤维局部偏聚是进一步改善提高复合材料力学性能的重要技术手段。 相似文献
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L. F. Allard S. P. Rawal M. S. Misra 《JOM Journal of the Minerals, Metals and Materials Society》1986,38(10):40-42
Fiber matrix interfaces in continuous fiber reinforced composites have been suspected as the regions of imperfections, high dislocation densities, residual stresses, etc., which affect the material’s properties. This paper examines micro-structural features of graphite/aluminum using analytical transmission electron microscopy. Included is the determination of dislocation densities at the interfaces by weak beam imaging technique. Also observed are tangled dislocation networks at the fiber matrix interfaces. 相似文献
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本文利用电镀工艺制备了表面镀镍碳纤维,通过双辊铸轧短流程成型工艺成功制备了连续碳纤维增强铝基(Cf/Al)复合材料板,研究了浇注温度对铸轧复合材料板的微观组织、界面特征、断口形貌和力学性能的影响。结果表明,浇注温度为963~983K,轧制速度为2.7m/min,辊缝为2.0mm的条件下可制备出表面平整、无明显表面缺陷的Cf/Al铸轧复合材料板;其中,浇注温度为973K时,碳纤维与铝基体之间界面结合良好;纤维表面金属镍层明显改善了碳纤维与铝基体之间的浸润性,镍镀层还有效抑制了Al4C3脆性相的产生,使Cf/Al复合材料板力学性能大幅提升,其中浇注温度973K铸轧的Cf/Al复合材料板抗拉强度比初始的38.2MPa提高了87.4%。 相似文献
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Effect of specific pressure on fabrication of 2D-Cf/Al composite by vacuum and pressure infiltration
Carbon fiber reinforced aluminum matrix (Cf/Al) composite has many excellent properties, and it has received more and more attention. Two-dimensional (2D) Cf/Al composites were fabricated by vacuum and pressure infiltration, which was an integrated technique and could provide high vacuum and high infiltration pressure. The effect of specific pressure on the infiltration quality of the obtained composites was comparatively evaluated through microstructure observation. The experimental results show that satisfied Cf/Al composites could be fabricated at the specific pressure of 75 MPa. In this case, the preform was infiltrated much more completely by aluminum alloy liquid, and the residual porosity was seldom found. It is found that the ultimate tensile strength of the obtained Cf/Al composite reached maximum at the specific pressure of 75 MPa, which was improved by 138.9% compared with that of matrix alloy. 相似文献
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The preparation and properties of ceramic short fiber reinforced Al-Si alloy matrix composite and it's application on the piston for internal combustion engines are presented.Alumina or aluminosilicate fibers reinforced Al-Si alloy matrix composite has more excellent synthetical properties at elevated temperature than the matrix alloys.A partially reinforced Al-Si alloy matrix composite piston produced by squeeze casting technique has a firm interface between reinforced and unreinforced areas,low reject rate and good technical tolerance.As a new kind of piston material,it has been used for mass production of about 400,000 pieces of automobile engines piston.China has become one of a few countries in which aluminum alloy matrix composite materials have been used in automobile industry and attained industrialization. 相似文献
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Al-Mg系自生纤维增强铝基复合材料组织与性能 总被引:1,自引:0,他引:1
为解决金属基复合材料中外加增强体与基体间异质界面对材料性能带来的不利影响,提出一种基于粉末冶金技术的原位复合新工艺,并制备出自生金属间化合物纤维增强铝基复合材料。研究结果表明,原位生成的金属间化合物纤维均匀分布在基体中,并平行于材料制备时的挤出方向;原位复合材料的增强效果明显,屈服强度比外加复合材料和基体分别高出28%和95.7%,断裂强度则相应提高了20.6%和88.5%;原位复合材料的强化机制主要是基体和增强体间界面结合良好,既能发挥基体的塑韧性,又能有效发挥自生增强体的强度优势,材料的断裂机制为自生纤维脆性断裂和劈裂。本研究同时表明,此方法工艺简单,成本低廉,且效率高,容易实现产业化。 相似文献