Papers by Author: David Salamon

Abstract: Bulk ceramic materials on the base of β-sialon were prepared from hydrosilicates. Except of some mechanical properties (HV, KIC) also the corrosion resistance of β-sialon against Cl-, iron and steel was investigated. The results were compared with β-sialon of similar composition z = 3.8, which was prepared from commercial powders Si3N4, AlN and Al2O3. The differences in mechanical properties of β-sialons prepared from natural hydrosilicates and synthetic powders are discussed.

Abstract: The main object of the presented work is the development of new ceramic cutting tools on the base of a-Sialon with other complementary phases. Owing to the presence of these secondary phases a significant improvement in the mechanical properties and chemical resistance has been achieved. The newly developed cutting tools allow a higher performance in machining of iron-based products, in particular the "heavy-to-machine-parts". Finally, the microstructure, phase composition, the resulting mechanical properties, and cutting tests are compared for the set of developed materials.