Self-lubricating bidirectional carbon fiber reinforced smart aluminum composites by squeeze infiltration process
Self-lubricating bidirectional carbon fiber reinforced smart aluminum composites by squeeze infiltration process
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DOI：
10.1016/j.jmst.2019.04.034
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发表时间：
2019-10
影响因子：
10.9
通讯作者：
K. Manu;L. Raag;Rajan T.P.D.;B. C. Pai;P. Vijay;Namdeo Verma Shweta
中科院分区：
文献类型：
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作者：
K. Manu;L. Raag;Rajan T.P.D.;B. C. Pai;P. Vijay;Namdeo Verma Shweta
自润滑是生产具有增强耐磨性和低摩擦系数的部件所需的智能材料特性之一。采用挤压浸渗法在双向缎纹聚丙烯腈基碳纤维织物预制体上成功浸渗铝合金6061。渗透复合材料显示出均匀分布的碳纤维在基体中的孔隙，消除纤维损伤和密切控制有害的碳化铝（Al 4C 3）相的形成。Cf/Al复合材料由于在销轴表面形成了自润滑摩擦层，阻断了基体金属与摩擦副表面的接触，因而具有较好的耐磨性。BD碳纤维通过抑制基体的塑性流动行为，提高了复合材料的硬度和抗压强度。高分辨透射电子显微镜显示，在复合界面处存在Al 2 O3和MgAl 2 O 4尖晶石，证实了EDS和SAD图案。复合材料显示出2.16 g/cm 3的较低密度，这是与单片合金（2.7 g/cm 3）相比重量减轻的主要优点。
Self-lubrication is one of the smart material properties required for producing components with enhanced wear resistance and low coefficient of friction. Bidirectional (BD) satin weave polyacrylonitrile (PAN) based carbon fiber (Cf) fabric preform was successfully infiltrated with Al 6061 alloy by squeeze infiltration process. The infiltrated composite shows uniform distribution of carbon fibers in the matrix with the elimination of porosities, fiber damage and close control on the formation of deleterious aluminum carbide (Al4C3) phase. Cf/Al composite exhibits remarkable wear resistance compared to unreinforced alloy due to the formation of self-lubricating tribolayer on the pin surface, which intercepts the contact of matrix metal to counter surface. The BD carbon fiber enhanced the hardness and compressive strength of the composite by restraining the plastic flow behavior of matrix. High resolution transmission electron microscopy shows the presence of Al2O3and MgAl2O4spinel, confirmed by EDS and SAD pattern, at the composite interface. The composite shows a lower density of 2.16 g/cm3which is a major advantage for weight reduction compared to the monolithic alloy (2.7 g/cm3).