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Title: Thin-walled reinforcement lattice structure for hollow CMC buckets

Abstract

A hollow ceramic matrix composite (CMC) turbine bucket with an internal reinforcement lattice structure has improved vibration properties and stiffness. The lattice structure is formed of thin-walled plies made of CMC. The wall structures are arranged and located according to high stress areas within the hollow bucket. After the melt infiltration process, the mandrels melt away, leaving the wall structure to become the internal lattice reinforcement structure of the bucket.

Inventors:
Publication Date:
Research Org.:
GENERAL ELECTRIC COMPANY, Schenectady, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1366729
Patent Number(s):
9,689,265
Application Number:
13/442,077
Assignee:
GENERAL ELECTRIC COMPANY NETL
DOE Contract Number:
FC26-05NT42643
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Apr 09
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

de Diego, Peter. Thin-walled reinforcement lattice structure for hollow CMC buckets. United States: N. p., 2017. Web.
de Diego, Peter. Thin-walled reinforcement lattice structure for hollow CMC buckets. United States.
de Diego, Peter. Tue . "Thin-walled reinforcement lattice structure for hollow CMC buckets". United States. doi:. https://www.osti.gov/servlets/purl/1366729.
@article{osti_1366729,
title = {Thin-walled reinforcement lattice structure for hollow CMC buckets},
author = {de Diego, Peter},
abstractNote = {A hollow ceramic matrix composite (CMC) turbine bucket with an internal reinforcement lattice structure has improved vibration properties and stiffness. The lattice structure is formed of thin-walled plies made of CMC. The wall structures are arranged and located according to high stress areas within the hollow bucket. After the melt infiltration process, the mandrels melt away, leaving the wall structure to become the internal lattice reinforcement structure of the bucket.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 27 00:00:00 EDT 2017},
month = {Tue Jun 27 00:00:00 EDT 2017}
}

Patent:

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  • The present invention relates to a method for fabricating thin-walled high-density structures oftungsten-nickel-iron alloys. A powdered blend of the selected alloy constituents is plasma sprayed onto a mandrel having the desired article configuration. The sprayed deposit is removed from the mandrel and subjected to liquid phase sintering to provide the alloyed structure. The formation of the thin-walled structure by plasma spraying significantly reduces shrinkage, and cracking while increasing physical properties of the structure over that obtainable by employing previously known powder metallurgical procedures.
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