Reaction Synthesis of TiAl-Al2O3 Composites from Ti-Al-Cr2O3

Abstract:

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Titanium aluminide composite reinforced with in situ formed submicron Al2O3 has been prepared by a reactive hot press method using Cr2O3, Al and Ti powder as starting materials. The reaction synthesis processing is particularly investigated. Results show that the matrix of the as-prepared material is a mixture of TiAl and a small amount of Ti3Al and Cr containing phase. Fine Al2O3 particles that act as reinforcing phase are dispersed along the interface of the matrix. The formation of TiAl/Al2O3 composite involves many transitional stages. Firstly, TiAl3 and Ti3Al intermediates were produced, then reducing reaction of Cr2O3 by Al formed Al2O3, and finally, the competitive solid-state diffusing reactions among Ti3Al, TiAl and TiAl3 produced the matrix phases of the TiAl/Al2O3 composite.

Info:

Periodical:

Advanced Materials Research (Volumes 211-212)

Edited by:

Ran Chen

Pages:

209-212

DOI:

10.4028/www.scientific.net/AMR.211-212.209

Citation:

J. F. Zhu et al., "Reaction Synthesis of TiAl-Al2O3 Composites from Ti-Al-Cr2O3", Advanced Materials Research, Vols. 211-212, pp. 209-212, 2011

Online since:

February 2011

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Price:

$35.00

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