Paper Title:
Reaction Synthesis of TiAl-Al2O3 Composites from Ti-Al-Cr2O3
  Abstract

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, W. W. Yang, F. N. Du, "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
$32.00
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