首页|挤压熔体浸渗法制备金属涂覆碳纤维增强铝基复合材料的润湿性和力学性能改善

挤压熔体浸渗法制备金属涂覆碳纤维增强铝基复合材料的润湿性和力学性能改善

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为了改善碳纤维与铝基体之间界面的润湿性和结合性能,采用挤压熔体浸渗法制备镍和铜涂覆碳纤维增强铝基复合材料,对两种不同涂层碳纤维增强铝基复合材料的界面润湿性、显微组织和力学性能进行比较和研究.显微组织结构分析表明,与无涂层碳纤维增强铝基复合材料相比,在相同的浸渗工艺条件下,在碳纤维表面涂覆两种金属均可以显著改善碳纤维与铝基体间的润湿性,铝熔体容易进入纤维束内部;两种金属界面层涂覆在铝熔体浸渗期间均可有效抑制碳纤维与铝基体间的界面化学反应,从而更有利于保持碳纤维的原始强度和改善纤维-基体界面结合性能.单轴拉伸力学性能研究结果表明,铜涂覆碳纤维增强铝基复合材料的屈服强度、极限抗拉强度和弹性模量分别约为124 MPa、140 MPa和82 GPa;镍涂覆碳纤维增强铝基复合材料的屈服强度、极限抗拉强度和弹性模量分别约为60 MPa、70 MPa和79 GPa.铜涂覆碳纤维增强铝基复合材料比镍涂覆碳纤维增强铝基复合材料具有更优性能.这是由于铜具有较低的熔点,在挤压熔渗过程中易形成致密的基体和良好的纤维-基体结合界面,从而使加载过程中的载荷容易从铝基体传输到碳纤维,充分发挥碳纤维的承载作用.
Improved wettability and mechanical properties of metal coated carbon fiber-reinforced aluminum matrix composites by squeeze melt infiltration technique
In order to improve the wettability and bonding performance of the interface between carbon fiber and aluminum matrix, nickel- and copper-coated carbon fiber-reinforced aluminum matrix composites were fabricated by the squeeze melt infiltration technique. The interface wettability, microstructure and mechanical properties of the composites were compared and investigated. Compared with the uncoated fiber-reinforced aluminum matrix composite, the microstructure analysis indicated that the coatings significantly improved the wettability and effectively inhibited the interface reaction between carbon fiber and aluminum matrix during the process. Under the same processing condition, aluminum melt was easy to infiltrate into the copper-coated fiber bundles. Furthermore, the inhibited interface reaction was more conducive to maintain the original strength of fiber and improve the fiber-matrix interface bonding performance. The mechanical properties were evaluated by uniaxial tensile test. The yield strength, ultimate tensile strength and elastic modulus of the copper-coated carbon fiber-reinforced aluminum matrix composite were about 124 MPa, 140 MPa and 82 GPa, respectively. In the case of nickel-coated carbon fiber-reinforced aluminum matrix composite, the yield strength, ultimate tensile strength and elastic modulus were about 60 MPa, 70 MPa and 79 GPa, respectively. The excellent mechanical properties for copper-coated fiber-reinforced composites are attributed to better compactness of the matrix and better fiber-matrix interface bonding, which favor the load transfer ability from aluminam matrix to carbon fiber under the loading state, giving full play to the bearing role of carbon fiber.

carbon fibermetal matrix compositeCf/Al compositecoatingwettabilitymechanical properties

沙建军、吕钊钊、沙如意、祖宇飞、代吉祥、鲜玉强、张伟、崔鼎、严从林

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大连理工大学工业装备结构分析国家重点实验室,大连 116024

大连理工大学辽宁省空天飞行器前沿技术重点实验室,大连 116024

中国工程物理研究院应用电子学研究所,绵阳 621900

碳纤维 金属基复合材料 Cf/Al复合材料 涂层 润湿性 力学性能

financial supports from Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering

U1630129

2021

10.1016/S1003-6326(21)65498-5

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(2)
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