Ceramic matrix composite member and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9752443-B2
Application number	US-201414250044-A
Country	US
Kind code	B2
Filing date	Apr 10, 2014
Priority date	Oct 14, 2011
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

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.

First claim

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, the principal part being formed of a ceramic fiber fabric; and
a subordinate part forming a platform part, the subordinate part being formed of a ceramic fiber fabric, wherein
the ceramic fiber fabric of the principal part includes a continuous fiber as a principal fiber, extending in a direction in which stress is applied, and
the subordinate part is joined on a side surface of the principal part in the vicinity of the dovetail part by stitching in a direction perpendicular to a longitudinal direction of the blade part,
thereafter, the principal part and subordinate part thus joined are integrated together by molding with the subordinate part folded at a desired angle to the principal part, and
a ceramic matrix is formed in the obtained molded body.

2. The ceramic matrix composite according to claim 1 , wherein
parts of the subordinate part are joined together by stitching in the longitudinal direction of the blade part at a position where the parts of the subordinate part are overlapped with each other when the subordinate part is folded.

Assignees

• Ihi Corp

Inventors

• Watanabe Fumiaki

Classifications

• Y02T50/672

  Cross-Sectional Technologies · mapped topic

• C04B2235/614

  Gas infiltration of green bodies or pre-forms · CPC title

• C04B37/00

  Joining burned ceramic articles with other burned ceramic articles or other articles by heating {(soldering and welding materials B23K35/24; laminated products B32B, E04C)} · CPC title

• C04B2235/5248

  Carbon, e.g. graphite · CPC title

• C04B2235/5256

  Two-dimensional, e.g. woven structures · CPC title