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Rapid synthesis of TiC/Ti3SiC2 composites by laser melting |
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| Affiliation: | 1. Department of physics, N.M.S.S.V.N College, Madurai, Tamilnadu 625019, India;2. Department of Physics, E.M.G. Yadava Women''s College, Madurai, Tamilnadu 625 014, India;3. Department of Physics and Nanotechnology, SRM University, Chennai, Tamilnadu 603203, India;1. Technological Institute for Superhard and Novel Carbon Materials, Centralnaya str. 7a, Troitsk 142190, Moscow, Russian Federation;2. International Laser Center, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russian Federation;3. Moscow Institute of Physics and Technology State University, Institutskiy per. 9, Dolgoprudny 141700, Moscow, Russian Federation;1. Institute of Material Science, TU Dresden, Helmholtzstr.7, 01067 Dresden, Germany;2. Fraunhofer IKTS Dresden, Winterbergstr. 28, 01277 Dresden, Germany |
| Abstract: | TiC/Ti3SiC2 composites were successfully synthesized by laser melting (LM) technique using Ti–Si–TiC with a molar ratio of 1:1.2:2 as starting powders in the holding time range of 15–60 s. Phase content and microstructure of the synthesized samples were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and X-ray energy dispersive spectrometer (EDS). The synthesis was extremely fast because the migration of solute mainly depended on the convection mixing of molten pool caused by intense laser beam which was far faster than the solid state diffusion by traditional methods. The apparent density and hardness of the composites are higher than Ti3SiC2 because of the existence of TiC phase. |
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