Siemens Energy, Inc.

Siemens Power Generation, Inc.

Vinod Philip

Dennis C Nagle

Paul John Zombo

Brij B Seth

A method for in-frame repairing of a thermal barrier coating () on a gas turbine component includes cleaning a desired surface portion () of the component without removing the component from the gas turbine. The method also includes roughening the surface portion in-frame, applying a bond coat () to the surface portion in-frame, and applying a ceramic topcoat () to the bond coat, in-frame. A system () for cleaning the surface portion in-frame includes an abrasive media () having a state change characteristic occurring at a temperature lower than an operating temperature of the gas turbine so that the abrasive media changes from a solid state to another state allowing the media to exit the gas turbine during operation. The system also includes an abrasive media sprayer () to direct a spray of the abrasive media at the desired surface portion.

In-frame repairing system of gas turbine components

A braze material () including nano-sized filler material particles (). The nano-sized particles will melt at a temperature significantly lower than the micron-sized particles used in prior art braze materials, thereby eliminating or reducing the need for the addition of temperature depressant materials such as boron or silicon. The resulting braze joint is substantially free of detrimental boride and suicides phases, thereby improving the material properties of the joint, eliminating the need for a separate post-braze diffusion heat treatment, and permitting a subsequent welding operation with reduced risk of cracking. The braze heat treatment may also function as a solution heat treatment, a pre-weld heat treatment or a post-weld heat treatment.

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Orlando, FL, United States of America

Vinod Philip