Selective laser sythesis of TiC-Al₂O₃ composite through controlled solid state combustion

Self-propagating high temperature synthesis (SHS) processes have previously been used to manufacture various high strength/temperature materials. A method for combining this process with the selective laser sintering (SLS) for rapid prototyping has been investigated. TiC-Al₂O₃ composite has the potential for high wear resistance, high hardness and toughness. By controlling the atmospheric conditions it is possible to prevent the oxidation of carbon allowing the reactants, TiO₂, Al and C, a greater opportunity to develop into the required TiC-Al₂O₃ composite. This paper reports basic experimental investigations on the controlling of the atmospheric conditions and also the possibility of controlled synthesis using a 60W diode laser.