1 / 2

1150°C, 1-h cycling

1150°C, 1-h cycling. GOALI: Pt-Enriched g + g  Bond Coats for Next-Generation Single-Crystal Ni-Base Superalloys Ying Zhang, Tennessee Technological University, DMR 0504566.

junius
Download Presentation

1150°C, 1-h cycling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1150°C, 1-h cycling GOALI: Pt-Enriched g+g Bond Coats for Next-Generation Single-Crystal Ni-Base SuperalloysYing Zhang, Tennessee Technological University, DMR 0504566 This research is to explore a new Pt-enriched +' bond coat system, which is expected to offer advantages over the current bond coats for thermal barrier coatings (TBCs), such as higher creep strength, better compatibility with the superalloy substrate, improved metallurgical stability, and reduced manufacturing cost. • Current research focuses on evaluation of TBC lifetime on various single-crystal superalloys in laboratory cyclic oxidation testing. • Yttria-stabilized zirconia (YSZ) TBCs were deposited by electron-beam physical vapor deposition (EB-PVD) at our industrial partner GE on superalloy samples with the new +’ bond coat and standard NiPtAl bond coat. • The cyclic oxidation testing was conducted at Oak Ridge National Laboratory. Lifetimes for EB-PVD YSZ-coated specimens for various alloys and coatings exposed in 1h cycles at 1150°C in dry O2. The bars note the standard deviation for 3 specimens, the circles are where the exposure of the specimen without a YSZ coating was stopped for characterization. • The longest YSZ coating lifetime was observed for the +’ coating with 7μm Pt on the 3rd-generation alloy N6. • For the 2nd-generation N5 alloy, the +’ coating with 7μm Pt showed a 50% higher lifetime than a standard β-NiPtAl coating.

  2. Undergraduate students received Best Poster Award on TTU’s 5th Annual Student Research Day Ying Zhang, Tennessee Technological University, DMR 0504566 • Student Research Day at TTU is an event DESIGNED TO SHOWCASE in a poster format the research and other scholarly activities of undergraduate and graduate students. Awards are given for the best poster in each major in both undergraduate and graduate categories. • On the 5th annual Student Research Day, the poster presented by the Mechanical Engineering undergraduates Bryan Haddock and Tia Rosenbalm was selected as the best poster in the undergraduate division. • Both students were supported by this NSF grant as undergraduate research assistants, working with Dr. Zhang on aluminide coatings on Ni-based superalloys. • Undergraduates Bryan Haddock and Tia Rosenbalm collaborated on a poster titled “Synthesis of Aluminide Coatings on Ni-Based Alloys.” The poster presented experimental set up for coating fabrication and summarized coating characterization using the SEM and EDXA.

More Related