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Ductile and strong aluminium-matrix titanium aluminide composite formedin situ from aluminium, titanium dioxide and sodium hexafluoroaluminate

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Abstract

An aluminium-matrix TiAl3-particle (1–2 μm) composite exhibiting high tensile ductility (22%), high tensile strength (235 MPa) and a grain size of 50 μm was made by a newin situ method involving reactions between Al, TiO2 and Na3AlF6, which were subjected to stir casting at 900 °C. The strength and ductility were higher than those of an aluminium-matrix TiAl3-particle Al2O3-particle composite madein situ by reacting Al with TiO2 (without Na3AlF6). This is due to the ability of Na3AlF6 to enhance the reduction of TiO2 and Al2O3, thus resulting in more TiAl3 and a smaller grain size.

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Authors and Affiliations

  1. Composite Materials Research Laboratory, State University of New York at Buffalo, 14260-4400, Buffalo, NY, USA

    Yuyong Chen & D. D. L. Chung

Authors
  1. Yuyong Chen
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  2. D. D. L. Chung
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Chen, Y., Chung, D.D.L. Ductile and strong aluminium-matrix titanium aluminide composite formedin situ from aluminium, titanium dioxide and sodium hexafluoroaluminate. J Mater Sci 30, 4609–4616 (1995). https://doi.org/10.1007/BF01153069

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  • DOI: https://doi.org/10.1007/BF01153069

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