Bonded niobium silicide and molybdenum silicide composite articles and method of manufacture

摘要

An airfoil having a melting temperature of at least about 1500 C. and comprising a first piece and a second piece joined at a bonded region to the first piece by a diffusion bond. The first piece comprises one of a first niobium-based refractory metal intermetallic composite and a first molybdenum-based refractory metal intermetallic composite. The second piece comprises one of a second niobium-based refractory metal intermetallic composite and a second molybdenum-based refractory metal intermetallic composite. The diffusion bond is formed from a first metallic element disposed on a first surface of the first piece and a second metallic element disposed on at least one of the first surface and a second surface of the second piece, the second surface contacting the first surface, wherein the first and second metal form a composition having a melting temperature less than about 1400 C. This abstract is submitted in compliance with 37 C.F.R. 1.72(b) with the understanding that it will not be used to interpret or limit the scope of or meaning of the claims