Wear resistant turbine fan blade

Abstract

The disclosure generally relates to a wear resistant turbine fan blade having a composite lubricated sheet adhered to a root of the turbine fan blade and having improved tribological properties at high temperatures.

What is claimed is: 
     
         1 . A wear resistant turbine fan blade comprising:
 a composite lubricating sheet adhered to a root of the turbine fan blade, wherein the composite lubricating sheet comprises:
 a fabric at least partially embedded with a resin, the fabric including an aromatic polyamide yarn, and a mixed yarn having the aromatic polyamide yarn and a low-friction yarn; and 
 a metallic layer adhered to one side of the fabric. 
   
     
     
         2 . The turbine fan blade according to  claim 1 , wherein the turbine fan blade is an integrated component of a machine selected from the group consisting of a rotor disk, a rotor assembly, and a turbine engine. 
     
     
         3 . The turbine fan blade according to  claim 2 , wherein the turbine fan blade is an integrated component of a turbine engine. 
     
     
         4 . The turbine fan blade according to  claim 1 , wherein the turbine fan blade comprises a metal selected from the group consisting of titanium, aluminum, steel, nickel, and alloys thereof. 
     
     
         5 . The turbine fan blade according to  claim 4 , wherein the turbine fan blade is titanium. 
     
     
         6 . The turbine fan blade according to  claim 1 , wherein the resin is phenol-formaldehyde resin. 
     
     
         7 . The turbine fan blade according to  claim 1 , wherein the aromatic polyamide yarn is selected from the group consisting of poly(para-phenylene terephthalamide), poly(meta-phenylene terephthalamide), poly(meta-phenylene isophthalamide), poly(para-phenylene isophthalamide), combinations thereof, and copolymers thereof. 
     
     
         8 . The turbine fan blade according to  claim 1 , wherein the low-friction yarn comprises graphite fiber or a fluoropolymer fiber. 
     
     
         9 . The turbine fan blade according to  claim 8 , wherein the fluoropolymer fiber comprises a polytetrafluoroethylene. 
     
     
         10 . The turbine fan blade according to  claim 1 , wherein the metallic layer is a metal selected from the group consisting of titanium, aluminum, steel, and nickel. 
     
     
         11 . The turbine fan blade according to  claim 10 , wherein the metallic layer is titanium. 
     
     
         12 . The turbine fan according to  claim 1 , wherein the metallic layer has a thickness in a range from approximately 50 microns to approximately 250. 
     
     
         13 . The turbine fan blade according to  claim 1 , wherein the metallic layer has a Vickers Hardness of approximately 30 HV or greater at a load of approximately 100 grams applied for approximately 20 seconds according to ASTM E-384. 
     
     
         14 . The turbine fan blade according to  claim 1 , wherein the composite lubricating sheet has a Compression Fraction in a range of 0.1% to approximately 20% with a pressure applied by compressing at approximately 127 microns/minute up to approximately 450 MPa and then released. 
     
     
         15 . The turbine fan blade according to  claim 1 , wherein the composite lubricating sheet additionally comprises an attaching layer between the fabric and the metallic layer, attaching layer comprising an adhesive selected from the group consisting of a thermoplastic adhesive or a thermoset adhesive. 
     
     
         16 . A turbine engine including at least one turbine fan blade having a composite lubricating sheet adhered to a root of the turbine fan blade, wherein the composite lubricating sheet comprises:
 a fabric at least partially embedded by a resin, the fabric including an aromatic polyamide yarn and a mixed yarn having the aromatic polyamide yarn and a low-friction yarn; and   a metallic layer adhered to one side of the resin embedded fabric.   
     
     
         17 . The turbine engine according to  claim 16 , wherein the the aromatic polyamide yarn is selected from the group consisting consisting of poly(para-phenylene terephthalamide), poly(meta-phenylene terephthalamide), poly(meta-phenylene isophthalamide), poly(para-phenylene isophthalamide), combinations thereof, and copolymers thereof; and the low-friction yarn comprises graphite or a fluoropolymer. 
     
     
         18 . The turbine engine according to  claim 16 , wherein the metallic layer is a metal selected from the group consisting of titanium, aluminum, steel, and nickel. 
     
     
         19 . The turbine engine according to  claim 16 , wherein the metallic layer has a Vickers Hardness of approximately 30 HV or greater at a load of approximately 100 grams applied for approximately 20 seconds according to ASTM E-384. 
     
     
         20 . The turbine engine according to  claim 16 , wherein the composite lubricating sheet has a Compression Fraction in a range of 0.1% to approximately 20% with a pressure applied by compressing at approximately 127 microns/minute up to approximately 450 MPa and then released.