Journal article

Self-Propagating High-Temperature Synthesis of Ti3SiC2: II. Kinetics of Ultra-High-Speed Reactions from In Situ Neutron Diffraction

Daniel P Riley, Erich H Kisi, Thomas C Hansen

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | WILEY-BLACKWELL | Published : 2008

Abstract

In situ neutron diffraction data at 0.9-s time resolution during the self-propagating high-temperature synthesis of Ti3SiC2 from stoichiometric 3Ti+SiC+C mixtures have been further analyzed to give the phase quantities during all five stages of the identified reaction [(i) preheating, (ii) α→β phase transformation in Ti, (iii) preignition reactions, (iv) intermediate phase formation, and (v) rapid nucleation and growth of Ti3SiC2]. The phase quantities thus determined have been used, in conjunction with temperatures estimated from lattice parameters and thermal expansion data, to determine the kinetic parameters for the nucleation and growth stage using a nonisothermal form of the Avrami kin..

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University of Melbourne Researchers