Strain-tolerant ceramic coated seal

Schienle, James L; Strangman, Thomas E

Title: Strain-tolerant ceramic coated seal

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Abstract

A metallic regenerator seal is provided having multi-layer coating comprising a NiCrAlY bond layer, a yttria stabilized zirconia (YSZ) intermediate layer, and a ceramic high temperature solid lubricant surface layer comprising zinc oxide, calcium fluoride, and tin oxide. An array of discontinuous grooves is laser machined into the outer surface of the solid lubricant surface layer making the coating strain tolerant.

Inventors:

Schienle, James L ^[1]; Strangman, Thomas E ^[1]

Phoenix, AZ

Issue Date:: 1994-01-01

OSTI Identifier:: 869526

Patent Number(s):: 5352540

Assignee:: AlliedSignal Inc. (Morris Township, Morris County, NJ)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
B32B18/00 - Layered products essentially comprising ceramics, e.g. refractory products

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2237/068 - based on refractory oxides, e.g. zirconia
C04B2237/123 - based on iron group metals, e.g. steel
C04B2237/34 - Oxidic
C04B2237/341 - Silica or silicates
C04B2237/343 - Alumina or aluminates
C04B2237/348 - Zirconia, hafnia, zirconates or hafnates
C04B2237/36 - Non-oxidic
C04B2237/368 - Silicon nitride
C04B2237/52 - Pre-treatment of the joining surfaces, e.g. cleaning, machining
C04B2237/62 - Forming laminates or joined articles comprising holes, channels or other types of openings
C04B2237/64 - Forming laminates or joined articles comprising grooves or cuts
C04B2237/66 - Forming laminates or joined articles showing high dimensional accuracy, e.g. indicated by the warpage
C04B2237/704 - of one or more of the ceramic layers or articles
C04B2237/708 - of one or more of the interlayers
C04B2237/72 - Forming laminates or joined articles comprising at least two interlayers directly next to each other

F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16J - PISTONS {
F16J15/3496 - {use of special materials}

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23M - CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES
F23M2900/05004 - Special materials for walls or lining
F23M5/00 - Casings

F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23R - GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
F23R2900/00005 - Preventing fatigue failures or reducing mechanical stress in gas turbine components
F23R3/007 - {constructed mainly of ceramic components}

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
F28D19/047 - {Sealing means}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T428/12549 - Adjacent to each other
Y10T428/12618 - Plural oxides
Y10T428/24355 - Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Y10T428/24413 - Metal or metal compound

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DOE Contract Number:: DEN3-335

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: strain-tolerant; ceramic; coated; seal; metallic; regenerator; provided; multi-layer; coating; comprising; nicraly; bond; layer; yttria; stabilized; zirconia; ysz; intermediate; temperature; solid; lubricant; surface; zinc; oxide; calcium; fluoride; array; discontinuous; grooves; laser; machined; outer; strain; tolerant; yttria stabilized; solid lubricant; coating comprising; strain tolerant; regenerator seal; layer comprising; temperature solid; zinc oxide; outer surface; surface layer; intermediate layer; stabilized zirconia; calcium fluoride; comprising zinc; multi-layer coating; nicraly bond; metallic regenerator; lubricant surface; bond layer; /428/415/

Citation Formats


                    Schienle, James L, and Strangman, Thomas E. Strain-tolerant ceramic coated seal.  United States: N. p., 1994. 
        Web.

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                    Schienle, James L, & Strangman, Thomas E. Strain-tolerant ceramic coated seal.  United States.

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                    Schienle, James L, and Strangman, Thomas E. Sat .  
        "Strain-tolerant ceramic coated seal".  United States.  https://www.osti.gov/servlets/purl/869526.

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@article{osti_869526,

  title        = {Strain-tolerant ceramic coated seal},

  author       = {Schienle, James L and Strangman, Thomas E},

  abstractNote = {A metallic regenerator seal is provided having multi-layer coating comprising a NiCrAlY bond layer, a yttria stabilized zirconia (YSZ) intermediate layer, and a ceramic high temperature solid lubricant surface layer comprising zinc oxide, calcium fluoride, and tin oxide. An array of discontinuous grooves is laser machined into the outer surface of the solid lubricant surface layer making the coating strain tolerant.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1994},

  month        = {1}

}

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