Fabrication and mechanical properties of Cu-coatedwoven carbon fibers reinforced aluminum alloy composite
Fabrication and mechanical properties of Cu-coatedwoven carbon fibers reinforced aluminum alloy composite
复制标题
镀铜编织碳纤维增强铝合金复合材料的制备及力学性能
DOI：
10.1016/j.matdes.2013.12.064
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发表时间：
2014-05
期刊：
影响因子：
--
通讯作者：
Wu, Tengteng
中科院分区：
文献类型：
--
作者：
Liu, Jinxu;Li, Shukui;Wang, Fuchi;Wu, Tengteng
采用放电等离子烧结法制备了铜涂层编织碳纤维/铝合金复合材料(CF/Al)。研究了复合材料的显微组织和力学性能。显微组织观察表明，铜涂层对界面反应有明显的抑制作用。机织碳纤维通过基体合金的锚定锁定作用，浸入碳纤维之间的空隙中，与基体合金粘结。在准静态和动态压缩条件下，当应变达到0.8时，复合材料仍表现出良好的延性。在ZL205A合金中加入碳纤维对复合材料的压缩流动应力没有明显影响。压缩真应力-真应变曲线表明，该复合材料为应变率不敏感材料。在拉伸试验中，由于机织碳纤维的加入，复合材料的伸长率从4.5%急剧提高到13.5%。同时，复合材料的拉伸强度比ZL205A合金略有提高，由168 Mpa提高到202 Mpa。复合材料良好的延性归因于裂纹偏转、纤维拔出、脱粘和断裂机制。
Cu-coatedwoven carbon fibers/aluminum alloy composite (Cf/Al) was prepared by spark plasma sintering. Microstructure and mechanical properties of the composite were investigated. Microstructure observation indicates that the interface reaction is evidently inhibited by Cu coating. Woven carbon fibers are adhered to the matrix alloy by anchor locking effect of matrix alloy immersing into the interstices between carbon fibers. Under the quasi-static and dynamic compressive conditions, the composite exhibits excellent ductility even when the strain reaches 0.8. Adding carbon fibers into ZL205A alloy has no obvious influence on compressive flow stress of the composite. The compressive true stress–true strain curves show that the composite is a strain rate insensitive material. During the tensile tests, the elongation of the composite shows a sharp increase from 4.5% to 13.5% due to the adding of woven carbon fibers. Meanwhile, the tensile strength of the composite is increased slightly from 168 MPa to 202 MPa compared to that of ZL205A alloy. The good ductility of the composite is ascribed to the cracks deflection, fibers pulling out, debonding and breakage mechanisms.
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