Abstract: A series of sintered shapes of silicon carbide of high strength comprising 0.027 to 11.300 atomic percent of one or more members of rare earth oxides and the balance of silicon carbide are disclosed. Method of making such silicon carbide shapes is also disclosed.
Abstract: A composite silicon carbide sintered shape is provided in two forms in which the former form includes rare earth oxides as a sintering assist, and the latter form includes rare earth oxides and/or aluminum oxide or boron oxide as a sintering assist, characterized in that both forms have a surface layer abundant in rare earth oxides. Methods for manufacturing such sintered shapes are also provided.