Sulzer Metco (us) Inc.

Sulzer Metco Inc.

Scott Wilson

Andreas Franz-Josef Kaiser

Andrew R Nicoll

Chris Dambra

Florian Rovere

Mitch Dorfman

Walter Pietrowicz

Dieter Sporer

Omar Sabouni

Eric Reents

Gustavo Arevalo

Eric Kozculab

Petr Fiala

Daniel Garcia

Canet Acikgoz Dorokin

A ceramic abradable material is provided for use for clearance control between turbine blade tips and the shroud or casing in gas turbine engines for industrial and/or aerospace applications. The ceramic abradable material includes an yttria stabilized zirconia (YSZ) that is doped in alumina (AlO). The ceramic abradable in accordance with the invention is a soft abradable material that provides for increased erosion resistance as well as the ability of the turbine blade tips to cut into the abradable without causing them damage. These properties allow for optimum tolerances within the gas turbine engine which results in superior efficiency and performance.

Ceramic abradable material with alumina dopant

A surface having an abrasive coating which includes silicon carbide (SiC) particles bound to the surface so as to form the abrasive coating. The SiC particles include a self-healing barrier layer that is in contact with an outer surface of the SiC particles. The self-healing barrier layer prevents degradation of the SiC particles.

Method for the treatment of the tip of a turbine blade and a turbine blade treated with a method such as this

The flow machine is furnished with an abradable () made of a particle composite material. This so-called composite () contains granular core particles () of a ceramic material. The surfaces () of the granular core particles carry functional layers () which form an intermediate phase of the composite which is stable at a high operating temperature. The intermediate phase in this process has been produced in situ at least in part by a chemical reaction of a precursor material (') and material () of the granular core particles on the particle surfaces (). Bonds () are formed between the granular core particles arranged in a porous composite by the intermediate phase. These bonds have a breaking characteristic for abradables.

Flow machine with a ceramic abradable

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Winterthur, Switzerland

Scott Wilson