Cermets and their use for the protection of iron and non-ferrous metal surfaces against thermal wear and oxidation

摘要

A metallo-ceramic composition for application by flame spraying to metallic surfaces e.g. iron, steel, copper or brass comprises:- TABS:1105199/C6-C7/1 The ceramic oxides must have a melting point of 1900 DEG C. or above and may be alpha alumina, zirconia stabilized with Ca, Mg or Y oxides, magnesia, magnesium-aluminium oxides (e.g. spinels), calcium zirconate or zirconium silicate but the simple oxides are preferred. The powder mixture is preferably used as such but the use of a sintered rod thereof is also disclosed. The application of more than one layer is also disclosed.