Catalysts, coatings, and structural components are some of the applications
of the synthetic inorganic materials described here, which range from zeol
ites to carbides and nitrides. The in-situ growth of beta -Si3N4 whiskers f
rom alpha -Si3N4 grains is depicted the Figure. Self-reinforced silicon nit
ride results, as the whiskers impart increased fracture toughness to the ce
ramic.