Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1998-04-22
1999-10-05
Zirker, Daniel
Coating processes
With post-treatment of coating or coating material
Heating or drying
4273766, 428325, 428328, 428331, 428402, C04B 35447, C04B 3578, F01D 1100, B32B 516
Patent
active
059620765
ABSTRACT:
An abradable seal comprises a plurality of hollow aluminosilicate spheres in a matrix of aluminium phosphate. The matrix of aluminium phosphate also has an aluminosilicate filler. The hollow aluminosilicate spheres have a diameter in the range of 400 to 1800 microns, preferably a diameter in the range of 800 to 1400 microns. The weight proportion of hollow aluminosilicate spheres in the abradable seal is 30% to 50%. The density of the abradable seal is 1.5 grams per cubic centimeter. The hollow aluminosilicate spheres in the aluminium phosphate matrix have a relatively high temperature capability of approximately 1300.degree. C. maximum. This makes the abradable seal better able to withstand the environment in the turbine of a turbofan gas turbine engine.
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Doleman Paul A.
Mason Stephen
Merrill Gary B.
Percival Michael J L
Rolls-Royce plc
Taltavull W. Warren
Zirker Daniel
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