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Plating of ceramic matrix composite parts as joining method in gas turbine hardware

A ceramic matrix and composite technology, applied in the direction of turbines, liquid chemical plating, welding media, etc., can solve problems such as difficult installation and difficult installation of metals, and achieve the effect of eliminating the need

Inactive Publication Date: 2012-08-22
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CMC must somehow be mounted to the metal structure of the turbine
This installation is difficult, not only because the CMC is a different material, and therefore may not be easily welded to the metal, but also because the CMC has a different thermal expansion system than the metal, so when the CMC gets hot, the CMC heats up more slowly than the metal rate of expansion, making it difficult to mount to metal

Method used

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  • Plating of ceramic matrix composite parts as joining method in gas turbine hardware
  • Plating of ceramic matrix composite parts as joining method in gas turbine hardware
  • Plating of ceramic matrix composite parts as joining method in gas turbine hardware

Examples

Experimental program
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Embodiment Construction

[0032] see figure 1 , shows a CMC item 2 (in this case a turbine bucket) in which a metal plate in the form of a metal strip 4 has been brazed, vapor deposited, welded, plated, Incorporated or joined in any combination thereof to the CMC article 2 by electroless plating. The metal strip is usually nickel. More metal plating could be incorporated onto the CMC article 2, but in this case only metal strips are used, to reduce the effect of different thermal expansion rates between the metal of the strip and the CMC article. As an alternative to metal strips, discs, squares or other metal shapes can be used.

[0033] figure 2 A side view of a CMC item 2 is shown in which a metal flexible connector 8 has been welded or brazed to a metal strip 4 . This accommodates, if necessary, the different expansion rates between the CMC item and the metal member (metal retainer).

[0034] image 3 The CMC item 2 is shown inserted into a metal member, in this case a metal holder 10 . The...

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Abstract

Method of joining a ceramic matrix composite article to a metallic component by providing the ceramic matrix composite article with a metallic region which bonds to the metallic component.

Description

[0001] This invention was made with Government support under Contract No. DE-FC26-05NT42643 awarded by the US Department of Energy. technical field [0002] The present invention relates to joining ceramic matrix composites (CMC) to metal components, such as metal parts of gas turbines. More specifically, the present invention provides techniques that can bond metal to CMCs that can then be used to attach CMCs to metal structures. In one embodiment, the technique provides a chemically bonded metal to CMC joint to reduce problems associated with differential thermal expansion rates, as well as alleviate the need to manufacture mechanical joints to extremely tight tolerances. Background technique [0003] It is known that ceramic matrix composites (CMCs) can be used in gas turbines at much higher temperatures than metals. Replacing metal components such as buckets, nozzles, shrouds, liners and transition pieces (TPs) with CMCs may allow operation at higher temperatures and / or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K35/02B23K35/30F01D5/18F01D5/28F01D9/02F01D25/08F01D25/24
CPCB23K1/0018B23K31/02B23K35/007B23K35/0233B23K35/3033C04B37/026C04B2237/123C04B2237/38C04B2237/40C04B2237/592C04B2237/597C04B2237/72C04B2237/76C04B2237/84C23C18/165C25D5/54F01D5/282F01D5/284F05D2300/6033B23K2101/001B23K2101/34B23K2103/18B23K2103/26B23K2103/52Y10T156/10Y10T428/24917Y10T428/24612Y10T428/12486
Inventor B·P·莱西A·加西亚-克雷斯波
Owner GENERAL ELECTRIC CO