Abstract
ABSTRACT The mechanism of structure formation during combustion synthesis of titanium silicides was investigated. It is shown that the propagation of an adiabatic combustion wave in a 5Ti + 3Si mixture follows the reaction coalescence mechanism, resulting in fine grains of Ti5Si3 crystallizing in the volume of melt. These grains grow rapidly behind the combustion front. Only the Ti5Si3 phase appears at the combustion temperature (2130°C), while other silicides (Ti5Si4, Ti3Si, etc.) may crystallize in the cooling zone. Time-resolved X-ray diffraction (TRXRD) analysis of the combustion process and layer-by-layer XRD analysis of the quenched combustion wave were utilized to study the sequence of phase formation. Interaction below the melting point of Ti is negligible in the self-propagating synthesis mode. A particle-foil technique was used to investigate the details of this lower temperature interaction.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
