SEAL SYSTEM WITH METALLIC COMPONENT AND CERAMIC COMPONENT HAVING SILICON LAYER AND BARRIER LAYER

A seal system 60 comprising a ceramic component 62 having a surface region 70 defining a first surface roughness, a metallic component 64 situated adjacent the surface region, and a coating system 71 disposed on the surface region 70. The coating system 71 includes a silicon-containing layer 66 on t...

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Bibliographische Detailangaben
Hauptverfasser:	Ding, Zhongfen, Hazel, Brian T, White III, Robert A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE ENGINE PLANTS IN GENERAL HEATING LIGHTING LIME, MAGNESIA MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES REFRACTORIES SLAG STEAM ENGINES TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	A seal system 60 comprising a ceramic component 62 having a surface region 70 defining a first surface roughness, a metallic component 64 situated adjacent the surface region, and a coating system 71 disposed on the surface region 70. The coating system 71 includes a silicon-containing layer 66 on the surface region and a barrier layer 68 on the silicon-containing layer. The silicon-containing layer 66 has a surface in contact with the barrier layer 68. The barrier layer 68 has a surface in contact with the metallic component 64. The surface of the barrier layer 68 has a second surface roughness that is less than the first surface roughness. The barrier layer 68 limits interaction between silicon of the silicon-containing layer 66 and elements of the metallic component 64. The barrier layer 68 has a coefficient of thermal expansion that is within about 60% of a coefficient of thermal expansion of the ceramic component 62. A gas turbine engine and a method are also disclosed.