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| 001 | 863562 | ||
| 005 | 20240711085642.0 | ||
| 024 | 7 | _ | |a 10.1557/jmr.2019.169 |2 doi |
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| 024 | 7 | _ | |a 0884-2914 |2 ISSN |
| 024 | 7 | _ | |a 2044-5326 |2 ISSN |
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| 100 | 1 | _ | |a Giese, Sven |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Microtensile creep testing of freestanding MCrAlY bond coats |
| 260 | _ | _ | |a Cambridge [u.a.] |c 2019 |b Cambridge Univ. Press |
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| 520 | _ | _ | |a Bond coats are essential in gas turbine technology for oxidation protection. Freestanding MCrAlY (M = Ni, Co) bond coats were investigated with respect to their creep strength at elevated temperatures. Three types of MCrAlY, a Ni-based bond coat Amdry 386, a Co-based bond coat Amdry 9954 and Amdry 9954 + 2 wt% Al2O3 (ODS = oxide dispersion strengthened) produced by low pressure plasma spraying, were analyzed. The two phase microstructure of the bond coats consists of a fcc γ-Ni solid solution and a B2 β-NiAl phase. Constant load experiments were performed in a thermomechanical analyzer at temperatures between 900 and 950 °C. Microtensile test specimens with a diameter of 450 µm were produced by a high-precision grinding and polishing process. Creep rupture was mainly due to void nucleation along the β–γ interfaces and grain boundaries. The time to failure is larger in Ni-based Amdry 386 compared to that in Co-based Amdry 9954 due to a higher fraction of the high-strength β-NiAl phase at test temperatures. The addition of ODS-particles in the Co-based bond coat Amdry 9954 resulted in a better creep resistance but lower ductility in comparison to ODS-particle-free Amdry 9954. |
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| 773 | _ | _ | |a 10.1557/jmr.2019.169 |g p. 1 - 10 |0 PERI:(DE-600)2015297-8 |n 15 |p 2643-2652 |t Journal of materials research |v 34 |y 2019 |x 2044-5326 |
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