Siemens Aktiengesellschaft

Siemens Energy, Inc.

Jonathan E Shipper

Anand A Kulkarni

Werner Stamm

Gary Brian Merrill

Cora Schillig

Ching-Pang Lee

Ramesh Subramanian

Ahmed Kamel

Kok-Mun Tham

Gm Salam Azad

Stefan Lampenscherf

Zhihong Gao

David G Sansom

Neil Hitchman

Dimitrios Zois

Barrry L Allmon

A bond coating having high corrosion and oxidation resistance and good compatibility with a thermal barrier coating is disclosed. The bond coating may be an optimized NiCrAlY material with additional materials that eliminates the presence of beta phase for oxidation by replacing the beta phase with a gamma/gamma prime system. The bond coating may also decrease the presence of phases that are detrimental to the mechanical and oxidation properties of the system, such as the sigma and BCC chromium phases. The bond coating may also have a gamma/gamma prime transition temperature that is about 400 degrees Celsius higher than conventional bond coatings, which enables local stresses to be reduced.

High temperature bond coating with increased oxidation resistance

A metallic coating is provided. The nickel based metallic coating includes tantalum, cobalt, chromium, and aluminum. The nickel based metallic coating does not include silicon and/or hafnium and/or zirconium. A tantalum addition in nickel based coating stabilized the phases gamma/gammaat high temperatures leading to a reduction of local stresses.

Metallic bondcoat or alloy with a high gamma/gamma' transition temperature and a component

A thermal barrier tile () with a braze layer () co-sintered to a ceramic layer () is brazed to a substrate () of a component for fabrication or repair of a thermal barrier coating () for example on a gas turbine ring segment (). The tile may be fabricated by disposing a first layer of a metal brazing material in a die case (); disposing a second layer of a ceramic powder on the metal brazing material; and co-sintering the two layers with spark plasma sintering to form the co-sintered ceramic/metal tile. A material property of an existing thermal barrier coating to be repaired may be determined (), and the co-sintering may be controlled () responsive to the property to produce tiles compatible with the existing thermal barrier coating in a material property such as thermal conductivity.

Method and apparatus for fabrication and repair of thermal barriers

A metallic coating or alloy is provided. The metallic coating includes iron, cobalt, chromium, and aluminum. Tantalum may also be included. A new addition in nickel based coating with stabilized gamma/gamma' phases at high temperatures lead to a reduction of local stresses. A component including the metallic coating or alloy is also provided.

Metallic bondcoat with a high gamma/gamma' transition temperature and a component

Turbine and compressor casing abradable component embodiments for turbine engines, with composite grooves and vertically projecting rows of ridges in planform patterns, establishing upper and lower wear zones. The lower wear zone reduces, redirects and/or blocks blade tip downstream airflow leakage, while the upper wear zone is optimized to minimize blade tip gap and wear by being more easily abradable than the lower zone. An elongated first ridge in the lower wear zone terminates in a continuous surface plateau. A plurality of second ridges or nibs, separated by grooves, project from the plateau, forming the upper wear zone. Each of the second ridges has a planform cross section smaller than the plateau planform cross section and a height smaller than the first ridge height. Some embodiments of the second ridges have spacing, planform cross sections, heights and separating groove dimensions selected for shearing when contacted by turbine blade tips.

Turbine abradable layer with progressive wear zone having a frangible or pixelated nib surface

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Orlando, FL, United States of America

Jonathan E Shipper