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

Abstract

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.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.