以NaCl、SnCl2、NH4Cl和PdCl2为润湿剂对SiCp进行净化处理。以净化处理后的SiCp为增强体，采用搅拌铸造法制备AA6011/Sip复合材料。采用标准方法对复合材料的延展性和硬度进行研究，并分别采用扫描电镜和X射线衍射仪研究复合材料的显微组织和相组成。结果表明，对于所有的润湿净化剂，复合材料的延展性随净化时间的延长增大到一定值，然后随着净化时间的继续延长，其延展性反而减小。在净化剂SnCl2浓度为40 g/L和净化时间为60 min的条件下，复合材料获得硬度为BHN 57.88和延展性为11.91%的最佳综合性能。复合材料的X射线衍射谱中仅出现少量Al4C3，表明净化过程抑制了有害析出物的形成。
Theductility and hardness of AA6011/SiCp composites using NaCl, SnCl2, NH4Cl and PdCl2 as wetting reagents were investigated. SiCp was cleaned with the wetting reagents, and used as reinforcement in AA6011 alloy using the stir casting method. Ductility and hardness responses of the composites were measured using standard methods. Microstructural features were examined using scanning electron microscopy and the phases were determined with the help of an X-ray diffractometer. The results show that for all wetting agents, the increase in cleaning time leads to initial increase in ductility to a certain value, but a decrease afterwards with further increase in cleaning time. The best combination of hardness (BHN 57.88) and ductility (11.91%) was shown under conditions of 40 g/L SnCl2and cleaning time of 60 min. A minor formation of Al4C3was noted in diffraction patterns, indicating that the formation of deleterious precipitate was hindered by the cleaning process.
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