Patent ID: 6071615
Filing Date: 2000-06-06
Classification: C03C,C04B,Y10T

Abstract:
A protective coating for a workpiece, in particular for a workpiece made from carbon composite material, with at least one protective layer, comprising that the protective layer contains refractory ceramic powder particles with high emissivity for heat radiation and glassy-amorphous phases of the general type Me.sub.2 O.sub.3 --MeO.sub.2 --B.sub.2 O.sub.3, where Me is selected from the group consisting of Si, Al, Zr, Ti, Hf and Y and at least one already formed glass with the following general oxidic composition Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --SiO.sub.2 --RO, where RO is selected from the group consisting of Mgo, Cao and BaO, which glass is a prior resistant of crystallization and the protective layer is based on a solids mixture which is heated for its formation and which, for the purpose of forming said glassy-amorphous phases contains at least one compound having the general elemental composition Me.sub.x B.sub.z, where x and Z each represent a number from 1 to 6, and Me is selected from the group consisting of Si, Al, Zr, Ti, Ht and Y.