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| Microstructure and mechanical properties of carbon fiber reinforced Al-Cu matrix composites for vehicles |
| WEI Yu-tang, CUI Su-hua |
| College of Mechanical Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China |
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Abstract The carbon fiber reinforced Al-Cu matrix composite coated with Cu electroplating solution was prepared by vacuum pressure infiltration method, and the mechanical properties of the samples were tested and the microstructure was observed. The results show that the surface of carbon fiber is plated with Cu to form an interface layer with compact structure and thickness of about 1 μm. A good bonding state is formed between carbon fiber and Al-Cu matrix, but no carbon fiber bundles separated from Al-Cu matrix is found. The carbon fiber has been fully permeated by the Al-Cu liquid, and no voids are found in the matrix. In addition to C and Al, Al2Cu intermetallic compound also exists in the composite material compared with the Al-Cu substrate. Compared with Al-Cu substrate, the tensile strength of CF/Al-Cu matrix composite is significantly increased. Many microcracks are formed in the carbon fiber bundle at the fracture stage, and stepped fractures are formed at this time, and the fracture site also has a flat structure.
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Received: 02 February 2019
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2019, Vol. 29 
