Functionally Graded TiC-Based Cermets via Combustion Synthesis and Quasi-Isostatic Pressing
Experimental results on the preparation of functionally graded TiC-based cermets obtained by combustion synthesis (also known as Self-Propagating High-Temperature Synthesis, SHS) followed by quasi-isostatic (QIP) pressing in a granulate medium are presented. Pellets of TiC-Fe graded cermets are produced by stacking layers of Ti and C powder mixtures in which the content of a NiFe alloy (50 wt% Ni and 50 wt% Fe) is varied from 5 up to 25 vol %. X-ray diffraction showed that the NiFe alloy did not react with the TiC, thus preserving its special properties. Scanning electron microscopy results show a graded material with pores increasing in size towards the side with the highest ceramic fraction.
Omer Van der Biest, Michael Gasik, Jozef Vleugels
M. Martinez Pacheco et al., "Functionally Graded TiC-Based Cermets via Combustion Synthesis and Quasi-Isostatic Pressing", Materials Science Forum, Vols. 492-493, pp. 63-68, 2005