Ceramic Gas Turbine Blades

Ceramic matrix composites cmcs.

Ceramic gas turbine blades.

A turbine blade is the individual component which makes up the turbine section of a gas turbine or steam turbine the blades are responsible for extracting energy from the high temperature high pressure gas produced by the combustor the turbine blades are often the limiting component of gas turbines. A stationary ceramic three piece blade structure for gas turbines has an annularly shaped ceramic insulator disposed on its outer periphery. Carbon brainprint ceramic coatings for jet engine turbine blades page 3 of 14 general description this study concerned the high pressure turbine blades located immediately behind the combustion chamber of a jet engine figure 1 where the temperature exceeds the melting point of the alloy used in the blades. The turbine blades have had a ceramic thermal barrier coating applied and now we install them into the j47 engine which will be installed in an f86 f sabre.

Supporting this design and fabrication has been process development using a prototype blade and compliant layer testing using a ceramic coupon duplicating the blade attachment. Because of the complex shape of stator vanes and turbine blades the development was first focused on the combustion chamber. The use of cmcs in gas turbines permit higher turbine inlet temperatures which improves turbine efficiency. An annularly shaped ceramic insulator is disposed on the inner side of the inner periphery of the blade structure.

The study results were calibrated with actual impact tests on 331 2oo ct ceramic turbine blades using 0 1 and 0 2 inch 2 5 and 5 1 mm diameter spherical carbon projectiles. The ceramic insulators maintain required heat patterns within the three piece ceramic blade members. With on one hand the prospect of coating failure leading to catastrophic blade loss and on the other hand an extremely expensive maintenance process it is no surprise that much research is dedicated to improving the. Engineering ceramics can be made in a wide range of sizes and shapes the turbine blades shown here are an example of the complex shapes that can now be achieved with the advanced fabrication methods available to the manufacturer these blades have been manufactured to the high material and dimensional specifications demanded by the aerospace industry.

The rotor assembly comprises a first gas flow assembly positioned within the turbine compressor casing and around the rotor. To survive in this difficult environment turbine blades often use exotic materials like. In this operation a gas turbine is taken apart each blade is dismantled its surface cleaned and a new coating applied. A rotor assembly for use in a turbine that has a rotor supported in a turbine compressor casing of the turbine for rotational movement of the rotor about a rotor axis.