Influence of substrate composition on the oxidation performance of nickel aluminide coating prepared by pack cementation

Zhou, Yuhua; Wang, Li; Wang, Guan; Jin, Dongliang; Wei, Hao; Zhao, Xiaofeng; Zhang, Jian; Xiao, Ping

doi:10.1016/j.corsci.2016.04.041

Cited by 33 publications

(7 citation statements)

References 36 publications

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“…For each specimen, more than 10 positions away from edges and the spalled area were measured. Then, residual stresses can be calculated by the equation [6,[19][20][21]:…”

Section: Methodsmentioning

confidence: 99%

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Liu

Dong

et al. 2021

Coatings

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β-NiAl coatings on a superalloy substrate will inevitably result in severe rumpling at elevated temperatures; however, the associated rumpling mechanisms are not completely understood. The scale rumpling behavior of a β-NiAlHf coating deposited by electron beam physical vapor deposition (EB-PVD) on single crystal superalloy IC21 was investigated in this work. Some internal factors, including the mismatch in the coefficient of thermal expansion and the stress induced by the growth of oxide scale and the phase transformation, were taken into consideration. The thermal mismatch stress between the coating and substrate was the main internal factor responsible for rumpling behavior during thermal cyclic loads, while the phase degradation from β-NiAl to γ’-Ni3Al in the coating played a dominant role during static thermal loads.

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“…For each specimen, more than 10 positions away from edges and the spalled area were measured. Then, residual stresses can be calculated by the equation [6,[19][20][21]:…”

Section: Methodsmentioning

confidence: 99%

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Liu

Dong

et al. 2021

Coatings

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“…Contrary to Hf, Ti has been widely reported to has a promoting effect on TGO growth [5,37,38]. Though the oxidation rates between the NiAl+DZ125L and NiAl+DZ125 were largely different, no discernible difference was found on the TGO microstructure between them, and no HfO 2 oxide was observed in the TGO on the NiAl+DZ125 sample (Fig.…”

Section: Factors Influencing the Tgo Growth Ratementioning

confidence: 96%

“…In this case, RE is prone to be incorporated to growing the TGO once oxidation occurs, which not only modifies the microstructure and morphology of the TGO, but also influences its growth rate and adherence. Previous reports also showed that the oxidation performance of coatings is strongly dependent on the chemical composition of the superalloy substrate, especially when containing REs, such as Hf, Zr, Ti [5,21,22]. It is suggested that though various substrate elements diffuse into coatings and influence its oxidation performance, the most significant effect should be ascribed to REs.…”

Section: Introductionmentioning

confidence: 99%

“…-NiAl is considered as one of the most promising materials to replace conventional MCrAlY (M=Ni, Co or both) for high temperature protection of superalloys and bond coats in thermal barrier coating (TBC) systems because of its high strength, high melting point, low density, good isothermal oxidation resistance and low cost [1,2]. In view of this, NiAl coatings fabricated by various methods, such as electron beam physical vapor deposition (EB-PVD) [3,4], pack cementation [5][6][7] and chemical vapor deposition (CVD) [8,9], have been developed and investigated.…”

Section: Introductionmentioning

confidence: 99%

“…This work attempts to develop an economic and high oxidation performance bond coat applied in the industrial gas turbines, together with characterization of RE effect both in the bond coat and superalloy substrate. In this work, Hf is chosen as the model element, which is the most widely used additive element both in superalloy and bond coat [5,18,23]. Four bond coat systems were used: undoped NiAl and Hf-doped NiAl bond coats both deposited on one Hf-free superalloy (DZ125L) and one Hf-containing superalloy (DZ125), respectively.…”

Section: Introductionmentioning

confidence: 99%

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The oxidation performance of plasma-sprayed NiAl bond coat: Effect of Hf addition in bond coat and substrate

Zhao

Luo

Xiao

et al. 2018

Surface and Coatings Technology

Self Cite

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NiAl bond coats with and without Hf addition (0.1 at%) were deposited on two types of superalloy substrates (i.e., DZ125L, no Hf, and DZ125, 0.51 at% Hf) using plasma spraying technique, and isothermally oxidized at 1150 ºC. It demonstrates that Hf addition in the bond coat is more effective than in the superalloy substrate for improving the bond coat oxidation resistance. In addition, though the substrate chemistry could affect the bond coat oxidation performance, this effect was very sensitive to the chemistry of the bond coat -obvious for the RE (reactive element)-free NiAl bond coat, but less obvious for the RE-containing bond coats (NiAlHf and NiCoCrAlY). Moreover, compared with the NiCoCrAlY bond coat, the NiAlHf bond coat showed significantly improved oxidation resistance, regardless of the substrate chemistry, suggesting that NiAlHf bond coat prepared by plasma spraying is a promising candidate for the thermal barrier coating application.

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Formation Mechanism of a Y-modified Cr-Al Coating Co-deposited on DZ125 Alloy and Its High-temperature Oxidation Resistance

Liang

Tian

et al. 2022

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Influence of substrate composition on the oxidation performance of nickel aluminide coating prepared by pack cementation

Cited by 33 publications

References 36 publications

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

Internal Factors Affecting the Surface Rumpling of a β-NiAlHf Coating

The oxidation performance of plasma-sprayed NiAl bond coat: Effect of Hf addition in bond coat and substrate

Formation Mechanism of a Y-modified Cr-Al Coating Co-deposited on DZ125 Alloy and Its High-temperature Oxidation Resistance

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