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| SiCp/Al-Si composites fabricated by cold pressing and sintering-hot extrusion process |
| ZHU Hong-mei |
| （Chongqing Real Estate College， Chongqing 401331， China） |
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Abstract SiCp/Al-Si composites were prepared by cold pressing and sintering-hot extrusion process. The interface between the reinforcement and the matrix was analyzed by JEM-2100 high resolution electron transmission microscope （HRTEM）. Results show that the interface between the reinforcement and the matrix is clear and smooth in the heat treated SiCp/Al-Si composite. The reinforcement and the matrix have good combination and the composite has good performance. The particle reinforcement SiC and Al matrix are combined directly， （1103）SiC//（010）Al， and the mismatch[δ]is 0.020 4， the substrate phase SiC is the effective crystallization core of Al. The interface is easy to form semi-coherent interface， which is helpful to improve the bonding strength of the interface. The interface between the alloy phase Al4Cu9 and Al matrix is clear and completely incoherent. After heat treatment， the alloy phase Al4Cu9 is transformed into Al2Cu phase and uniformly distributed in the Al matrix， and the semi-coherent interface is formed.
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Received: 04 May 2017
Published: 27 February 2018
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2018, Vol. 28 
