Title:
ニッケル基超合金およびコバルト基超合金を同時にアルミナイズする方法
Document Type and Number:
Japanese Patent JP4549490
Kind Code:
B2
Abstract:
A process for simultaneously vapor phase aluminizing nickel-base and cobalt-base superalloys within a single process chamber using the same aluminum donor and activator, to yield diffusion aluminide coatings of approximately equal thickness. The process entails the use of an aluminum donor containing about 50 to about 60 weight percent aluminum, and an aluminum fluoride activator present in an amount of at least 1 gram per liter of coating chamber volume. Nickel-base and cobalt-base superalloys are simultaneously vapor phase aluminized for 4.5 to 5.5 hours at a temperature of about 1900 DEG F to about 1950 DEG F in an inert or reducing atmosphere. With these materials and process parameters, diffusion aluminide coatings are developed on both superalloys whose thicknesses do not differ from each other by more than about 30%.
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Inventors:
Nripendra Eggplant Das
Patricia Ann Charles
Raymond William Haydawn
Patricia Ann Charles
Raymond William Haydawn
Application Number:
JP2000152243A
Publication Date:
September 22, 2010
Filing Date:
May 24, 2000
Export Citation:
Assignee:
GENERAL ELECTRIC COMPANY
International Classes:
C23C10/08; F01D5/28; C23C10/48
Domestic Patent References:
| JP63190158A | ||||
| JP4263073A | ||||
| JP10130863A | ||||
| JP1180959A |
Attorney, Agent or Firm:
Arakawa Satoshi