Author/Authors :
Fatemi Nayeri، S. H. R. نويسنده Advanced Materials Research Center, Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran , , Aboutalebi، M. R. نويسنده Center of Excellence for High Strength Alloys Technology, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Iran, Tehran. , , Vahdati Khaki، J. نويسنده ,
Abstract :
A mixture of TiO2+Al+C powders was mechanically activated using a planetary ball
mill under different milling conditions wherein the milled powders were further subjected to
combustion synthesis to produce TiC+Al2O3 composite. The mechanically alloyed powders were
characterized by X-Ray diffraction analysis and TEM investigations. XRD analysis of milled
powder mixture showed no significant reaction between TiO2, Al and C while a significant
amorphization of powder mixtures was observed. TEM analysis indicated the formation of a
composite structure of powder particles after milling. The subsequent thermal treatment of the
milled powder mix showed that the milling of initial powder mixture under dry environment using
mixed large and small balls had a great effect on reaction efficiency and yielded to the highest
TiC + Al2O3 ratio in the synthesized products.
