Ceramic matrix composite member and method of manufacturing the same

Abstract

A ceramic matrix composite member used as a turbine blade includes a principal part forming a blade part and a dovetail part, and a subordinate part forming a platform part. A principal fiber in a ceramic fiber fabric forming the principal part is a continuous fiber. An extension direction of the principal fiber is in parallel with a direction in which stress is applied. The ceramic fiber fabrics respectively forming the principal part and the subordinate part are joined together and formed into an integrated three-pronged fiber fabric. The ceramic fiber fabric forming the principal part and the ceramic fiber fabric forming the subordinate part are integrated together by being set into a mold with the ceramic fiber fabric forming the subordinate part folded at a desired angle to the ceramic fiber fabric forming the principal part. Then, a ceramic matrix is formed in the obtained molded body.

What is claimed is: 
     
         1 . A ceramic matrix composite member to be used as a turbine blade, comprising:
 a principal part forming a blade part and a dovetail part; and   a subordinate part forming a platform part, wherein   a principal fiber in a ceramic fiber fabric forming the principal part is a continuous fiber,   a direction of the principal fiber is in parallel with a direction in which stress is applied,   the ceramic fiber fabric forming the principal part and a ceramic fiber fabric forming the subordinate part are joined together to form an integrated three-pronged fiber fabric,   the ceramic fiber fabric forming the principal part and the ceramic fiber fabric forming the subordinate part are integrated together by being set into a mold with the ceramic fiber fabric forming the subordinate part folded at a desired angle to the ceramic fiber fabric forming the principal part, and   a ceramic matrix is formed in the obtained molded body.