Patent ID: 6586118
Filing Date: 2003-07-01
Classification: B23K,B32B,F01D,F05C,F05D,Y02T,Y10T

Abstract:
An article having a melting temperature of at least about 1500Â° C., said article comprising:a) a first piece comprising one of a first niobium-based refractory metal intermetallic composite and a first molybdenum-based refractory metal intermetallic composite, wherein said first niobium-based refractory metal intermetallic composite comprises titanium, hafnium, silicon, chromium, and niobium, and said first molybdenum-based refractory metal intermetallic composite comprises molybdenum, silicon, and at least one of chromium and boron; and b) a second piece joined by a braze to said first piece, said second piece comprising one of a second niobium-based refractory metal intermetallic composite and a second molybdenum-based refractory metal intermetallic composite, wherein said second niobium-based refractory metal intermetallic composite comprises titanium, hafnium, silicon, chromium, and niobium, and said second molybdenum-based refractory metal intermetallic composite comprises molybdenum, silicon, and at least one of chromium and boron, and wherein said braze is a semi-solid braze that comprises a first component and a second component, said first component comprising a first element and a second metallic element, wherein said first element is one of titanium, palladium, zirconium, niobium, germanium, silicon, and hafnium, wherein said second metallic element is one of titanium, palladium, zirconium, niobium, hafnium, aluminum, chromium, vanadium, platinum, gold, iron, nickel, and cobalt, said second metallic element being different from said first element, and wherein said second component has a melting temperature of greater than 1450Â° C. and comprises at least one of niobium, molybdenum, titanium, hafnium, silicon, boron, aluminum, tantalum, germanium, vanadium, tungsten, zirconium, and chromium.