Effect of alloying elements and microstructure on the cyclic oxidation performance of three nickel-based superalloys

Mallikarjuna, H.T.; Richards, N.L.; Caley, W. F.

doi:10.1016/j.mtla.2018.11.004

Cited by 18 publications

(2 citation statements)

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“…Cobalt oxide (Co 3 O 4 ) is susceptible to spall during isothermal high-temperature exposure due to its high defect concentration and porous structure [28]. MoO 3 is a volatile oxide, which melts at 795 °C and break down beyond 1100 °C [11,12,29]. The presence of these spinels, especially with the addition of Ta and Mo, may be responsible for initial rapid mass gain.…”

Section: Xrd Analysis Of the Oxidized Nickel-based Alloysmentioning

confidence: 99%

“…There have been different opinions reported on the oxidation behavior of the alloying elements in nickel-based alloy. Tantalum has been reported to either improve or degrade the oxidation behavior of nickel-based superalloys [7,11,12]. The oxides of Al and Cr such as Al 2 O 3 and Cr 2 O 3 have been reported to enhance the oxidation resistance of nickelbased superalloys [7].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nanocrystalline Nickel Powder and Co, Mo, Ta, and Al Additions on Isothermal Oxidation Behavior of Ni–17Cr Alloy

Babalola

Shongwe

Maledi

et al. 2020

Metallogr. Microstruct. Anal.

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In this paper, the effect of nanocrystalline nickel powder developed via high-energy ball milling process and the addition of Co, Mo, Ta, and Al on the isothermal oxidation behavior of Ni-17Cr binary alloy developed by spark plasma sintering system was investigated. The oxidation behavior of the sintered alloys was studied in air at 1100 °C for exposure period up to 312 h. The oxidation rate and kinetics show that the addition of Al and nanocrystalline nickel enhances the oxidation resistance of the binary alloy followed by Mo, Co, and Ta in their reducing order. The formation of the chromia scale was common to all the sintered alloys investigated as confirmed by X-ray diffraction, scanning electron microscopy, and energydispersive X-ray spectroscopy analysis.

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