Sulzer Innotec Ag

Sulzer Metco (us) Inc.

Sulzer Metco Inc.

Franz Jansen

Mitchell R Dorfman

Luis F Correa

Xiaohan Wei

John Peters

Heinrich Hofmann

Wilfried Kurz

Daniele Mari

St&egrave;wes Bourban

A powder of dicalcium silicate is made by spray drying calcia and silica with incorporation of sodium and phosphorus or stabilized zirconia. The spray dried powder is sintered to form a thermal spray powder. Sprayed coatings have a web of interconnected, randomly oriented microcracks substantially perpendicular to the coating surface. The coatings are stable in thermal cycling and a hot corrosive environment.

Thermal spray powder of dicalcium silicate and coating thereof and manufacture thereof

The use of a thermal spray method relates to the production of a layer (,) for a heat insulating coat of a material (,) in powder form. This material consists at least to,mol % of zirconium silicate ZrSiO,, in particular of the mineral zircon, and the majority of its powder particles (,) have diameters in the region between,and,&mgr;m. During the spraying on the particles are at least partially melted through in a gas flow (,) under reducing conditions and at a temperature greater than 20000&deg; C. Method parameters, among others the dwell time of the particles in a heat imparting medium, in particular a plasma (,) or a flame, the temperature of the heat imparting medium and the momentum transferred to the particles, are chosen in such a manner that the layer (,) which is formed of the particles has a structure with lamellar elements (,). Suitable gases or gas mixtures, preferably hydrogen, are used as reducing means for the liberation of gases containing silicon, in particular silicon monoxide SiO; and/or a thermal liberation of gases containing silicon takes place as a result of a high temperature of the heat imparting medium.

Use of a thermal spray method for the manufacture of a heat insulating coat

The method for the production of a ceramic layer on a metallic base material combines the following measures: The base material is preheated. Ceramic coating material is applied to a locally melted surface region of the base material. The coating material is therein likewise melted. A metallurgical bonding zone is provided using an additive material which reacts with the coating material and which is additionally applied to the base material as an adhesion producing layer or is added to the base material as a component of the alloy.

Method for the production of a ceramic layer on a metallic base material

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Winterthur, Switzerland

Franz Jansen