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Title:
PROTECTIVE TUBE FOR THERMOCOUPLE
Document Type and Number:
Japanese Patent JP2010031372
Kind Code:
A
Abstract:

To provide a protective tube for a thermocouple which can be used in a high temperature oxidizing atmosphere in a gas turbine, and exhibits good oxidation resistance, high creep fracture strength and high thermal shock resistance.

The protective tube is produced from a single-crystal nickel-based superalloy, preferably from an alloy having the following chemical composition (in mass%): 7.7 to 8.3 Cr, 5.0 to 5.25 Co, 2.0 to 2.1 Mo, 7.8 to 8.3 W, 5.8 to 6.1 Ta, 4.9 to 5.1 Al, 1.3 to 1.4 Ti, 0.11 to 0.15 Si, 0.11 to 0.15 Hf, 200 to 750 ppm C, 50 to 400 ppm B, remainder nickel and unavoidable impurities.


Inventors:
Nazmy, Mohamed
Kuenzler, Andreas
Bandiera, Giuseppe
Zinn, Hanspeter
Application Number:
JP2009000172795
Publication Date:
February 12, 2010
Filing Date:
July 24, 2009
Export Citation:
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Assignee:
ALSTOM TECHNOLOGY LTD
International Classes:
C22C19/05; G01K1/08