Self-Propagating Combustion Synthesis
Dr. A. Cuneyt Tas
Dept. of Metallurgical and
Aqueous solutions of chromium nitrate (Cr(NO3)3. 9H2O) and aluminum nitrate (Al(NO3)3.9H2O) in appropriate volumetric amounts, were used as the starting materials in the synthesis of "Ruby" (0.2 to 1 at% Cr) powders. Urea was used as the oxidation agent during the combustion synthesis. Glycine or carbohydrazide may be considered as the alternative oxidation agents in this process.
Morphological properties and the sintering behavior of the synthesized powders
were investigated by the SEM (scanning electron microscopy) studies.
"SEM micrograph of Ruby powders heated at 1500°C"
The highly interesting grain morphology observed warrants further research..