Silicon carbide (SiC) particles were modified in situ, using A1(3+) complexes in aqueous media, via control of A1(NO3)(3) concentration and pH. The A1(3+) formed hydrolyzed complexes that adsorbed onto the charged sites on the SiC particle surfaces. As a result, the surface-modified SiC particles behaved in an alumina-like manner in the approximate pH range 5-8. The modified SiC particles were further treated with two types of polyelectrolytes that were sequentially adsorbed onto the particle surface, to give a maximum surface charge. As a result of this surface-modification process, the SIC could be dispersed with A1(2)O(3). in aqueous media without heteroaggregation.