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The mechanism of combustion synthesis of titanium carbonitride

Published online by Cambridge University Press:  03 March 2011

M. Eslamloo-Grami  and
Z.A. Munir
M. Eslamloo-Grami
Affiliation:
Department of Mechanical, Aeronautical, and Materials Engineering, University of California at Davis, Davis, California 95616-5294
Z.A. Munir
Affiliation:
Department of Mechanical, Aeronautical, and Materials Engineering, University of California at Davis, Davis, California 95616-5294
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Abstract

Titanium carbonitride, TiC0.5N0.5, is synthesized directly by a self-propagating reaction between titanium and carbon in a nitrogen atmosphere. Complete conversion to the carbonitride phase is achieved with the addition of TiN as diluent and with a nitrogen pressure ≥0.6 MPa. Thermodynamic phase-stability calculations and experimental characterizations of quenched samples support a proposed mechanism in which the formation of the carbonitride is a two-step process. The first step involves the formation of the nonstoichiometric carbide, TiC0.5, and is followed by the formation of the product by the incorporation of nitrogen in the defect-structure carbide to form the carbonitride solid solution.

Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 2 , February 1994 , pp. 431 - 435
Copyright
Copyright © Materials Research Society 1994

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