Rolls-royce Corporation

John T Gent

Joanne M Shipton, Legal Representative

William B Litchfield

Martin J Deakin

James A Graham

Glen Pattinson

Mark Henry Shipton

Christopher Sellars

A seal () between a compressor rotor blade () and compressor casing () comprises an abradable structure () on the compressor casing (). The abradable structure () comprises a metallic foam () having pores (). The metallic foam () has a first a region () and a second region (). The first region () of the metallic foam () is arranged adjacent to the compressor casing () and the second region () of the metallic foam () is spaced from the compressor casing () by the first region () of the metallic foam (). The pores () of the second region () of the metallic foam () contain an abradable material () and the pores () of the first region () of the metallic foam () do not contain an abradable material.

Seal and a method of manufacturing a seal

A compressor blade () comprises a vibration damping coating () on a first surface of at least one portion of an erosion resistant material (). The vibration damping coating () comprises a plurality of segments (). The portion of erosion resistant material () and the vibration damping coating () are adhesively bonded to the compressor blade () such that the vibration damping coating () is arranged between the surface () of the compressor blade () and the portion of erosion resistant material ().

Article having a vibration damping coating and a method of applying a vibration damping coating to an article

A powder suitable for flame spraying which is a composition of an admixture of particles, 20-40% by volume of the particles being an alloy such as a nickel base alloy or cobalt base alloy, each containing aluminium and chromium and the balance of the composition are hollow glass particles, each hollow glass particle being coated with a nickel base alloy or cobalt base alloy, each containing aluminium and chromium. The powder, when flame sprayed, is effective as a thermal barrier which is resistant to thermal shock and oxidation.

Coating material

A powder suitable for flame spraying comprising particles of an alumino silicate glass, each of the particles being hollow and coated with an alloy containing, by weight, 80% nickel, 2.5% aluminium, 15.7% chromium and 1.8% silicon. The resultant coating is particularly suitable for use as a thermal barrier.

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Derby, United Kingdom

John T Gent