# US 9,752,443 B2 · Ceramic matrix composite member and method of manufacturing the same

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- Number: US 9,752,443 B2
- Document ID: US9752443B2
- Status: Granted
- Kind: B2
- Application number: 14/250,044
- Filed: 2014-04-10
- Published: 2014-10-30
- Granted: 2017-09-05
- Earliest claimed: 2011-10-14
- Assignees: IHI Corporation
- Applicants: IHI Corporation
- Inventors: Fumiaki Watanabe
- Web page: https://patentgrep.com/patent/US9752443B2

## CPC

- F01D 5/284: {Selection of ceramic materials}
- B32B 18/00: Layered products essentially comprising ceramics, e.g. refractory products
- C04B 35/80: Fibres, filaments, whiskers, platelets, or the like
- C04B 37/00: Joining burned ceramic articles with other burned ceramic articles or other articles by heating {(soldering and welding materials B23K35/24; laminated products B32B, E04C)}
- C04B 37/001: {directly with other burned ceramic articles}
- F01D 5/282: {Selecting composite materials, e.g. blades with reinforcing filaments}
- F01D 5/3084: {the blades being made of ceramics}
- C04B 2235/5224: Alumina or aluminates
- C04B 2235/524: Non-oxidic, e.g. borides, carbides, silicides or nitrides
- C04B 2235/5244: Silicon carbide
- C04B 2235/5248: Carbon, e.g. graphite
- C04B 2235/5252: having a specific pre-form
- C04B 2235/5256: Two-dimensional, e.g. woven structures
- C04B 2235/5268: Orientation of the fibers
- C04B 2235/614: Gas infiltration of green bodies or pre-forms
- C04B 2235/616: Liquid infiltration of green bodies or pre-forms
- C04B 2237/38: Fiber or whisker reinforced
- C04B 2237/60: Forming at the joining interface or in the joining layer specific reaction phases or zones, e.g. diffusion of reactive species from the interlayer to the substrate or from a substrate to the joining interface, carbide forming at the joining interface
- C04B 2237/61: Joining two substrates of which at least one is porous by infiltrating the porous substrate with a liquid, such as a molten metal, causing bonding of the two substrates, e.g. joining two porous carbon substrates by infiltrating with molten silicon
- F05D 2300/6033: Ceramic matrix composites [CMC]
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.