Affiliation:
1. Shaanxi University of Science & Technology, Ministry of Education, Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Xi'an, Shaanxi, China
Abstract
Al2O3/TiAl composites were successfully fabricated from powder mixtures of
Ti, Al, TiO2, Cr2O3 and Nb2O5 by a hot-press-assisted exothermic dispersion
method. The effect of the Cr2O3 and Nb2O5 addition on the microstructures and
mechanical properties of Al2O3/TiAl composites was characterized. The results
showed that the specimens are mainly composed of TiAl, Ti3Al, Al2O3, NbAl3
and Cr2Al. The Vicker-hardness and density of Al2O3/TiAl composites increase
gradually with the increase of Nb2O5 content. When the Nb2O5 content was 6.54
wt %, the flexural strength and fracture toughness of the composites have a
maximum values of 789.79 MPa and 9.69 MPa?m1/2, respectively. The improvement
of mechanical properties is discussed in detail.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Condensed Matter Physics,Ceramics and Composites
Cited by
3 articles.
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