Journal of South China University of Technology(Natural Science Edition) ›› 2004, Vol. 32 ›› Issue (8): 64-67.

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Microstructure of SiC /Al2O3 /Al Composite Formed by the Direct Oxidation of Aluminum Alloys

Zhou Xi-ya1 Gao Qin2   

  1. 1.College of Materials Science and Engineering, South China Univ.of Tech., Guangzhou 510640, Guangdong, China;
    2.Dept.of Materials Engineering, Dalian Univ.of Tech., Dalian 116023, Liaoning, China
  • Received:2003-03-03 Online:2004-08-20 Published:2015-09-09
  • Contact: 周曦亚(1966-), 男, 博士, 副研究员, 主要从事陶瓷复合材料研究 E-mail:imxyzhou@scut.edu.cn
  • About author:周曦亚(1966-), 男, 博士, 副研究员, 主要从事陶瓷复合材料研究

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Abstract: The microstructure of SiC/Al 2 O 3 /Al composite formed by the direct oxidation of aluminum alloys which infiltrated into the SiC precast part was analyzed by means of XRD, TEM and metallomicroscope .It is found that the composite is composed of α-Al 2 O 3 , SiC, Al 4 O 4 C, Al and Si .α-Al 2 O 3 is the skeleton phase of the composite, which is 3D-interconnected and is of clear interfaces.It is also found that Al and Si are wrapped in the grains of α-Al 2 O 3 , while at another main phase , SiC grains are separated from other phases .In addition , there is Al 4 O 4 C in the composite , which means that SiC grains have reacted with aluminum and oxygen in the growth of the composite .

Key words: aluminum alloy, composite material, microstructure, oxidation, SiC, Al2O3

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