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Early stages of phase formation before the ignition peak during mechanically induced self-propagating reactions (MSRs) of titanium and graphite

Journal Article


Abstract


  • The mechanism of mechanically induced self-propagating reaction (MSR) of titanium with graphite to produce TiC during reactive ball milling of elemental powders was investigated using high resolution electron microscopy, and Raman and X-ray photoelectron spectroscopies. Prior to the exothermic ignition, off-stoichiometric Ti(1+x)C(1 - x) nuclei are formed by reaction at the interface between the severely deformed Ti particles and graphite milling debris. After ignition, both rapid growth of existing nuclei, and nucleation and growth of additional off-stoichiometric Ti(1+x)C(1 - x) occurs. Local product morphologies after the ignition varied, depending local restrictions on the rate of diffusion of carbon into the TiC as it grows.

Publication Date


  • 2016

Citation


  • Oghenevweta, J. E., Wexler, D. & Calka, A. (2016). Early stages of phase formation before the ignition peak during mechanically induced self-propagating reactions (MSRs) of titanium and graphite. Scripta Materialia, 122 93-97.

Scopus Eid


  • 2-s2.0-84973395036

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5587

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 93

End Page


  • 97

Volume


  • 122

Place Of Publication


  • United Kingdom

Abstract


  • The mechanism of mechanically induced self-propagating reaction (MSR) of titanium with graphite to produce TiC during reactive ball milling of elemental powders was investigated using high resolution electron microscopy, and Raman and X-ray photoelectron spectroscopies. Prior to the exothermic ignition, off-stoichiometric Ti(1+x)C(1 - x) nuclei are formed by reaction at the interface between the severely deformed Ti particles and graphite milling debris. After ignition, both rapid growth of existing nuclei, and nucleation and growth of additional off-stoichiometric Ti(1+x)C(1 - x) occurs. Local product morphologies after the ignition varied, depending local restrictions on the rate of diffusion of carbon into the TiC as it grows.

Publication Date


  • 2016

Citation


  • Oghenevweta, J. E., Wexler, D. & Calka, A. (2016). Early stages of phase formation before the ignition peak during mechanically induced self-propagating reactions (MSRs) of titanium and graphite. Scripta Materialia, 122 93-97.

Scopus Eid


  • 2-s2.0-84973395036

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/5587

Has Global Citation Frequency


Number Of Pages


  • 4

Start Page


  • 93

End Page


  • 97

Volume


  • 122

Place Of Publication


  • United Kingdom