Abstract
Mechanical alloying (MA) refined the 3Ti/Si/2C powder particles and produced severe lattice distortion, which significantly improved the reaction activities of the powders. When the powder was exposed to air, it spontaneously self-ignited inducing self-propagating high temperature synthesis (SHS) of titanium silicon carbide (Ti 3SiC 2). A porous product was obtained. The surface of the product was a TiO 2 layer, but the inner was the Ti 3SiC 2 and TiC mixture. The Ti 3SiC 2 content of a bulk product was about 83 wt%. A possible reaction mechanism was proposed to explain the formation of Ti 3SiC 2 by SHS in air induced by mechanical activation (MA).
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