摘要:
A method (200) of coating a substrate with cryo-milled, nano-grained particles includes forming a face-centered-cubic gamma matrix (202) comprising nickel, cobalt, chromium, tungsten and molybdenum, adding a dispersion strengthening material (204) to the gamma matrix to form a first mixture, cryo-milling (206) the first mixture to form a second mixture to form a nano-grained structure, and cold spraying (212) the second mixture onto a substrate to form a coating having a nano-grained structure.
摘要:
A process (101) of forming a calcium-magnesium-aluminosilicate (CMAS) penetration resistant coating, and a CMAS penetration resistant coating are disclosed. The process includes providing a thermal barrier coating (110) having a dopant (112), and exposing the thermal barrier coating (110) to calcium-magnesium-aluminosilicate (114) and gas turbine operating conditions. The exposing forming a calcium-magnesium-aluminosilicate penetration resistant layer (201). The coating includes a thermal barrier coating composition (110) comprising a dopant (112) selected from the group consisting of rare earth elements, non-rare earth element solutes, and combinations thereof. Additional or alternatively, the coating includes a thermal barrier coating (110) and an impermeable barrier layer or a washable sacrificial layer positioned on an outer surface of the thermal barrier coating.
摘要:
A vanadium resistant coating system resistant to high temperature vanadium attack. The system comprises a high temperature superalloy substrate (10). A bond coat (20) overlies the superalloy substrate (10). The bond coat (20) may be applied in multiple layers. A ceramic coating (40) overlies the bond coat. The ceramic coating (40) further comprises a zirconium oxide stabilized by at least one cation selected from the group consisting of Yb 3+ , Lu 3+ , Sc 3+ and Ce 4+ , in the amounts of about 5-10 weight percent. An overcoat may overlie the ceramic coating. The overcoat may be a sacrificial layer of YSZ infiltrated with cations having an atomic radius larger than Y 3+ . Alternatively, the overcoat may comprise zirconium oxide stabilized by Ce 4+ .
摘要:
A process (101) of forming a calcium-magnesium-aluminosilicate (CMAS) penetration resistant coating, and a CMAS penetration resistant coating are disclosed. The process includes providing a thermal barrier coating (110) having a dopant (112), and exposing the thermal barrier coating (110) to calcium-magnesium-aluminosilicate (114) and gas turbine operating conditions. The exposing forming a calcium-magnesium-aluminosilicate penetration resistant layer (201). The coating includes a thermal barrier coating composition (110) comprising a dopant (112) selected from the group consisting of rare earth elements, non-rare earth element solutes, and combinations thereof. Additional or alternatively, the coating includes a thermal barrier coating (110) and an impermeable barrier layer or a washable sacrificial layer positioned on an outer surface of the thermal barrier coating.
摘要:
A method (200) of coating a substrate with cryo-milled, nano-grained particles includes forming a face-centered-cubic gamma matrix (202) comprising nickel, cobalt, chromium, tungsten and molybdenum, adding a dispersion strengthening material (204) to the gamma matrix to form a first mixture, cryo-milling (206) the first mixture to form a second mixture to form a nano-grained structure, and cold spraying (212) the second mixture onto a substrate to form a coating having a nano-grained structure.
摘要:
A mechanical seal includes a pair of opposing seal faces (10), wherein at least one of the pair of seal faces (10) includes a multilayer coating (14) disposed on a substrate (12), wherein the multilayer coating (14) has a periodic repetition of distinct layers, a plurality of layers of a composite wherein no two adjacent layers of the composite comprise an identical ratio of composite constituents, or both. A method of making the seal includes disposing a multilayer coating (14) on a substrate (12) to form at least one of a pair of opposing seal faces (10) of a mechanical seal.
摘要:
A nanocomposite comprising a plurality of nanoparticles dispersed in a metallic alloy matrix, and a structural component formed from such a nanocomposite. The metallic matrix comprises at least one of a nickel-based alloy and an iron-based alloy. The nanocomposite contains a higher volume fraction of nanoparticle dispersoids than those presently available. The structural component include those used in hot gas path assemblies, such as steam turbines, gas turbines, and aircraft turbine. A method of making such nanocomposites is also disclosed.
摘要:
An erosion resistant protective structure for a turbine engine component comprises a shape memory alloy. The shape memory alloy includes nickel-titanium based alloys, indium-titanium based alloys, nickel-aluminum based alloys, nickel-gallium based alloys, copper based alloys, gold-cadmium based alloys, iron -platinum based alloys, iron-palladium based alloys, silver-cadmium based alloys, indium-cadmium based alloys, manganese-copper based alloys, ruthenium-niobium based alloys, ruthenium-tantalum based alloys, titanium based alloys, iron-based alloys, or combinations comprising at least one of the foregoing alloys. Also, disclosed herein are methods for forming the shape memory alloy onto turbine component.
摘要:
A method for fabricating thermal barrier coatings. The thermal barrier coatings are produced with a fine grain size by reverse co-precipitation of fine powders. The powders are then sprayed by a solution plasma spray that partially melts the fine powders while producing a fine grain size with dense vertical cracking. The coatings comprise at least one of 45% -65% Yb 2 O 3 the balance Zr, Yb/Y/Hf/Ta the balance Zr and 2.3-7.8% La, 1.4-5.1% Y and the balance Zr and are characterized by a thermal conductivity that is about 25-50% lower than that of thermal barrier coatings comprising YSZ. The thermal barrier coatings also are characterized by at least one of excellent erosion resistance, fracture toughness and abrasion resistance.
摘要:
Multilayered coatings 10 include an adhesion base layer 12 that can adhere to a metal substrate 20, and a top surface layer 16 that has a surface roughness of less than or equal to about Ra 0.0254 µm, wherein at least one of the layers 12, 16 comprises a diamond-like carbon.