Evaluation of Simple Aluminide and Platinum Modified Aluminide Coatings on High Pressure Turbine Blades After Factory Engine Testing

Conner, Jeffrey A.; Moore, David; Wustman, Roger D.

doi:10.1115/91-gt-379

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Platinum modified aluminide diffusion coatings have been used by many OEM's (Conner et al 1991, DeMasi-Marcin, LT., and Gupta, D.K., 1994, and VanRoode, M.V.e and Aurrecoechea, 1., 1989 for hot section component protection, and have proved to provide excellent protection against oxidation and hot corrosion attack. These coatings are produced by first electroplating a thin layer of platinum onto the component surface followed by the akmlinng step.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Performance Evaluation of Pack Cementation and Chemical Vapor Deposition Platinum Aluminide Coatings

Mutasim¹,

Brentnall²

1996

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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Metallurgical evaluation of platinum aluminide coatings applied to industrial gas turbine components, for oxidation and high temperature hot corrosion protection, were conducted. Coatings were processed by electroplating a thin layer of platinum followed by aluminizing using either the pack cementation or the chemical vapor deposition (CVD) processes. Laboratory and field data on the performance of these coatings are presented. Results from these tests showed that both aluminizing processes produced coatings that provided adequate environmental protection. However, the CVD coating experienced less coating growth during engine service and was therefore determined to be thermally more stable than the pack cementation coating in this application.

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Section: Introductionmentioning

confidence: 99%

Characterization and Performance Evaluation of Pack Cementation and Chemical Vapor Deposition Platinum Aluminide Coatings

Mutasim¹,

Brentnall²

1996

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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“…Previous factory engine testing by GE Aircraft Engines (Conner et. al., 1991) demonstrated the improved environmental protection provided by platinum modified aluminide coatings versus simple aluminide coatings for directionally solidified (DS) nickel base stage 1 high pressure turbine (HPT) blades operating in a combined high temperature oxidation / hot corrosion environment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Simple Aluminide and Platinum Modified Aluminide Coatings on High Pressure Turbine Blades After Factory Engine Testing-Round II

Connor¹

1992

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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This paper presents results of factory engine testing of simple aluminide and platinum modified aluminide coatings. Simple aluminide coatings were produced using pack cementation processes. Platinum modified aluminide coatings were produced using three aluminiding processes; pack cementation, above-the-pack or out-of-contact processing, and chemical vapor deposition. These coatings were evaluated on both directionally solidified and single crystal nickel base superalloy turbine blades. These high pressure turbine blades were tested in a commercial high bypass turbofan engine operating predominantly in a high temperature oxidation environment. Included in this paper are discussions of coatings phase stability, coating growth due to diffusion during engine operation, comparison of coating performance and assessment of remaining coating life after engine testing.

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Field Experience of Platinum Aluminide Coated Turbine Blades

Aurrecoechea¹,

Hsu²,

Kubarych³

1995

Materials and Manufacturing Processes

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This paper describes the results obtained from an evaluation of several platinum aluminide coated first stage turbine blades returned from the field. The IN-738LC blades had accumulated from 3,900 to 27,500 service hours in Centaur (1) 50 industrial gas turbine engines, operating in a high temperature oxidizing environment. The coating performance and condition were assessed using optical and electron microscopy. The condition of the coating was correlated to blade operating temperatures, which were estimated using the gamma prime coarsening technique. The degradation mechanism of the coating, remaining coating life, and blade repairability were also addressed.

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Evaluation of Simple Aluminide and Platinum Modified Aluminide Coatings on High Pressure Turbine Blades After Factory Engine Testing

Cited by 3 publications

References 4 publications

Characterization and Performance Evaluation of Pack Cementation and Chemical Vapor Deposition Platinum Aluminide Coatings

Characterization and Performance Evaluation of Pack Cementation and Chemical Vapor Deposition Platinum Aluminide Coatings

Evaluation of Simple Aluminide and Platinum Modified Aluminide Coatings on High Pressure Turbine Blades After Factory Engine Testing-Round II

Field Experience of Platinum Aluminide Coated Turbine Blades

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