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| Home > Publications database > Isothermal aging of a γ′-strengthened Co–Al–W alloy coated with vacuum plasma-sprayed MCrAlY bond coats > print |
| 001 | 255546 | ||
| 005 | 20240711085651.0 | ||
| 024 | 7 | _ | |a 10.1016/j.surfcoat.2015.06.048 |2 doi |
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| 100 | 1 | _ | |a Terberger, Philipp |0 P:(DE-Juel1)136664 |b 0 |e Corresponding author |u fzj |
| 245 | _ | _ | |a Isothermal aging of a γ′-strengthened Co–Al–W alloy coated with vacuum plasma-sprayed MCrAlY bond coats |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2015 |b Elsevier Science |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1442833753_28359 |2 PUB:(DE-HGF) |
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| 520 | _ | _ | |a Cobalt-based superalloys with a γ/γ′ microstructure were discovered in 2006 and are currently being investigated as an alternative to nickel-based superalloys for high-temperature, high-load applications in gas turbine blades. They promise a better castability combined with a similar creep strength. Superalloy turbine blades are commonly coated with oxidation resistant bond coats. For this reason their compatibility needs to be studied. Co–9Al–9W specimens with a γ/γ′ microstructure were coated with either a nickel-based or cobalt-based MCrAlY bond coat using vacuum plasma spraying. After aging at 900 °C in air for up to 500 h no decomposition of the γ′ phase was found in the bulk superalloy. The interdiffusion zone shows several different W-rich topologically close-packed phases arising from the dissolution of the γ′ phase in this region. The W-rich phases are identified to be μ phase for both bond coats and R phase for the nickel-based bond coat only. Their total volume is higher for the nickel-based bond coat. Therefore the cobalt-based bond coat is better suited for the Co-based superalloy substrate. Room temperature hardness and Young's modulus were measured using nanoindentation in the initial state and after heat treatment. A significantly higher Young's modulus was found for the cobalt-based bond coat. |
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| 773 | _ | _ | |a 10.1016/j.surfcoat.2015.06.048 |g Vol. 276, p. 360 - 367 |0 PERI:(DE-600)1502240-7 |p 360 - 367 |t Surface and coatings technology |v 276 |y 2015 |x 0257-8972 |
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