J Mater Sci Technol ›› 1996, Vol. 12 ›› Issue (5): 365-368.

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In-situ Formed AIN Particulates and TiN Whiskers Mixture Reinforced Al Composite

Chunxiang CUI; Renjie WU and Guoding ZHANG (Institute of Composite Materials, Shanghai Jiao Tong University, Shanghai 200030, China)   

  • Received:1996-09-28 Revised:1996-09-28 Online:1996-09-28 Published:2009-10-10

Abstract: The TiNw-AINp/Al composite has been successfully fabricated by gas-liquid reaction method in an intensive electromagnetic mixing and casting in an appropriate cooling condition. The as-cast samples of the composite exhibit a homogeneous distribution of TiNw and AINp, and the in situ formed TiN whisker has a mean diameter of 0.5 μm and mean aspect ratio of 5.8~7.5, and the diameter of the AIN particulates is less than 5 μm. TEM observation indicates that there exist some submicron and nanometer sized in situ formed TiNw-AINp in α-Al matrix. The formation mechanism of in situ formed TiNw and AINp is also discussed