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

Authors

J E. Oghenevweta, University of Wollongong
David Wexler, University of WollongongFollow
Andrzej Calka, University of WollongongFollow

RIS ID

107975

Publication Details

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.

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.

Grant Number

ARC/LE120100104

Additional Grant Number

http://purl.org/au-research/grants/ARC/LE120100104