Fabrication of High-purity Ternary Carbide Ti₃AlC₂ by Spark Plasma Sintering（SPS）Technique

SONG Jinghong~1 YANG Haitao~2 (1.The Centre for Materials Research and Analysis,Wuhan University of Technology,Wuhan 430074,China; 2.Shenzhen University,Shenzhen Key Lab of Special Functional Materials,Shenzhen 518060,China)

摘 要：<正>The effect of silicon on synthesis of Ti₃AlC₂ 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 Ti₃AlC₂ and fully dense,essentially single-phase（purity>98%） polycrystalline Ti₃AlC₂ 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 Ti₃AlC₂ 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.

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