Rolls-royce Corporation

Mark C Nordin

Li Li

Brandon David Ribic

Stephen Norman Hammond

Lawrence E Brown

A system may include a stationary component including: a substrate and an abradable layer on the substrate. The system also may include a rotating component including a tip and an abrasive coating system on the tip. The abrasive coating system may include a barrier layer and an abrasive material. The barrier layer may include at least one of hafnon, hafnium oxide, a blend of hafnium oxide and silicon or silicon oxide, a rare earth silicate, BSAS, stabilized zirconia, or stabilized hafnia. The blade track or blade shroud and the gas turbine blade are configured so the abrasive coating system contacts a portion of the abradable layer during rotation of the rotating component. The abradable layer is configured to be abraded by the contact by the abrasive coating system.

Abrasive coating for high-temperature mechanical systems

An electrospark alloying apparatus includes a main body member, a collet coupled to the main body member, and a heat sink adjacent the collet. The collet is adapted to receive and hold a consumable electrode. The apparatus can also include a drive for rotating the electrode. Further, the apparatus can include an inert gas supply and a discharge opening in the main body member for facilitating lamellar gas flow of insert gas from the inert gas supply around the electrode. A method of electrospark alloying includes electrospark alloying a workpiece with a consumable electrode and cooling the electrode during the electrospark welding.

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Indianapolis, IN, United States of America

Mark C Nordin