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The effect of silicon on synthesis of Ti_3AlC_2 by spark plasma sintering(SPS)from TiC/ Ti/Al powders was investigated.X-ray diffraction(XRD)and scanning electron microscope(SEM)were used for phase identification and microstructure evaluation.The results show that addition of silicon can considerably accelerate the synthesis reaction of Ti_3AlC_2 and fully dense,essentially single-phase(purity>98%) polycrystalline Ti_3AlC_2 could be successfully obtained by sintering 2TiC/1Ti/1Al/0.2Si powders at 1 200- 1 250℃under a pressure of 30 MPa.SEM photographs show that the obtained Ti_3AlC_2 samples from mixtures powders are in plane-shape with a size of about 2-5μm and 10-25μm in the thickness dimension and elongated dimension,respectively.
The effect of silicon on synthesis of Ti_3AlC_2 by spark plasma sintering (SPS) from TiC / Ti / Al powders was investigated. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used for phase identification and microstructure evaluation.The results show that addition of silicon can due accelerate the synthesis reaction of Ti 3 AlC 2 and fully dense, essentially single-phase (purity> 98%) polycrystalline Ti_3AlC_2 could be successfully obtained by sintering 2TiC / 1Ti / 1Al / 0.2Si powders at 1 200-1 250 ℃ under a pressure of 30 MPa.SEM photographs show that the obtained Ti_3AlC_2 samples from the powders are in plane-shape with a size of about 2-5μm and 10-25μm in the thickness dimension and elongated dimension, respectively.