Patent ID: 7479302
Filing Date: 2009-01-20
Classification: B23P,F02K,F28D,F28F,Y10T

Abstract:
1. A method for manufacturing a ceramic matrix composite tubular shell structure having an inner wall, an outer wall and a plurality of cooling channel passages formed between said inner wall and said outer wall, wherein said ceramic matrix composite tubular shell structure is manufactured by the steps comprising: a. fabricating an inner tooling mandrel for defining the inside geometry of said inner wall; b. fabricating a plurality of cooling channel tooling mandrel segments for defining the inside geometry of said plurality of cooling channel passages of said tubular shell structure; c. fabricating a fibrous preform of refractory reinforcing fibers; d. depositing a fiber coating onto said fibrous preform which fully encapsulates the refractory reinforcing fibers thereof; e. depositing a ceramic matrix material onto said fibrous preform to fully encapsulate and consolidate said coated fibrous preform into a densified fiber reinforced ceramic matrix composite material; f. removing said inner tooling mandrel and said plurality of cooling channel tooling mandrel segments from said densified ceramic matrix composite tubular shell structure; g. machining said densified ceramic matrix composite tubular shell structure; and h. depositing a ceramic seal coating material onto said densified ceramic matrix composite tubular shell structure following said machining of said tubular shell structure.