In situsynthesis of Fe(Co)/TiC composite by self-propagating high temperature and mechanochemical methods

Abstract

Fe(Co) composite locally reinforced with in situ TiC particulates was successfully synthesised utilizing the mechanochemical and self-propagating high temperature synthesis (SHS) reaction of FeTi-Co-C system. The microstructure of the Fe(Co)/TiC composite was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). With the help of differential thermal analysis (DTA), the reaction path of the FeTi-Co-C system was studied. X-ray patterns exhibited gradual formation of TiC during 5-10 h milling process. DTA results indicated that Co has considerable effects on thermal behaviour of this system, which reduced ignition temperature to 1025uC. By comparing these results, it was found that the Fe(Co)-TiC composite could be fabricated using both methods although finer structure and better reinforcement dispersion was obtained via mechanochemical technique.

Effect of C/Ti ratio on the compressive properties and wear properties of the 50 vol.-% submicron-sized TiCx/2014Al composites fabricated by combustion synthesis and hot press consolidation

“…The proliferation of the in situ method used for preparing metal matrix composites is due to many factors, such as good interface between the reinforcement phase and matrix, pure reaction products with small ceramic size and stable properties. [6][7][8][9][10][11] Shu et al 3 investigated the compressive behaviours and abrasive wear resistance of the 50, 60 and 70 vol.-% TiC x / Al composites, which were prepared by the in situ method of combustion synthesis and hot press consolidation. The compressive strength of the three composites were 714, 815 and 744 MPa, respectively.…”

“…The proliferation of the in situ method used for preparing metal matrix composites is due to many factors, such as good interface between the reinforcement phase and matrix, pure reaction products with small ceramic size and stable properties. 6–11…”