Hot Corrosion Behavior of Hf-Doped NiAl Coating in the Mixed Salt of Na2SO4 + K2SO4 at 900 °C

Zhang, Wei Li; Li, Weihua; Fu, Lihua; Xiao, Peng; Sun, Jinhua; Jiang, S.M.; Gong, Jun; Sun, Chao

doi:10.1007/s40195-023-01563-2

Cited by 1 publication

(2 citation statements)

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“…Sarraf et al [59] presented the reactive air-aluminizing (RAA) methodology as a low-cost method with high efficiency in forming an aluminide coating on Inconel 738LC. Zhang et al [60] reported that the 5Hf-NiAl coating deposited on a nickel-based superalloy by arc-ion plating exhibited superior hot-corrosion resistance in comparison to a conventional NiAl coating. Such behavior was related to the addition of Hf, which promoted the formation of a protective oxide scale and reduced the growth rate of the oxide scale.…”

Section: Non-conventional Deposition Approachesmentioning

confidence: 99%

“…Such trends enforce the need to enhance the durability of coatings as well. Therefore, rare earth elements, including zirconium [18][19][20], hafnium [21,60,66], palladium [46,66], rhenium [47,52,69] and platinum [49,51,52,63,66,[69][70][71], are frequently added to significantly extend the service temperature of nickel-based superalloys up to 1300 • C. One can conclude that their addition is extremely beneficial as not only the operating temperature increase but also the material stability of the coating is improved.…”

Section: Summary and Future Perspectivesmentioning

confidence: 99%

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Recent Advances in the Deposition of Aluminide Coatings on Nickel-Based Superalloys: A Synthetic Review (2019–2023)

Kopec

2024

Coatings

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Thermal barrier coatings (TBCs) are widely used to improve the oxidation resistance and high-temperature performance of nickel-based superalloys operating in aggressive environments. Among the TBCs, aluminide coatings (ACs) are commonly utilized to protect the structural parts of jet engines against high-temperature oxidation and corrosion. They can be deposited by different techniques, including pack cementation (PC), slurry aluminizing or chemical vapor deposition (CVD). Although the mentioned deposition techniques have been known for years, the constant developments in materials sciences and processing stimulates progress in terms of ACs. Therefore, this review paper aims to summarize recent advances in the AC field that have been reported between 2019 and 2023. The review focuses on recent advances involving improved corrosion resistance in salty environments as well as against high temperatures ranging between 1000 °C and 1200 °C under both continuous isothermal high-temperature exposure for up to 1000 h and cyclic oxidation resulting from AC application. Additionally, the beneficial effects of enhanced mechanical properties, including hardness, fatigue performance and wear, are discussed.

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Section: Non-conventional Deposition Approachesmentioning

confidence: 99%