Effect of Pd and Hf co-doping of aluminide coatings on pure nickel and CMSX-4 nickel superalloy

Romanowska, Jolanta; Morgiel, J.; Kołek, Łukasz; Kwolek, Przemysław; Zagula-Yavorska, Maryana

doi:10.1016/j.acme.2018.05.007

Cited by 10 publications

(15 citation statements)

References 20 publications

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“…Higher concentrations of Hf in aluminide coatings might be a result of its outward diffusion from the MAR M247 superalloy. According to Romanowska et al [30], it forms an Hf-rich belt between outer additive layer and the diffusion zone. Based on the obtained results, it is possible to form three-element Pt + Pd + (Hf or Zr) aluminide coatings using proposed technology on the industrial scale.…”

Section: Discussionmentioning

confidence: 99%

Microstructure of Aluminide Coatings Modified by Pt, Pd, Zr and Hf Formed in Low-Activity CVD Process

et al. 2021

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In the present article the doping of aluminide coatings by Pt/Pd as well as Hf or Pd using industrial processes was developed. The different combinations of doping elements were tested as well as their influence on chemical composition of coatings was initially investigated. The Pt and Pd and both Pt + Pd was electroplated on the surface of the MAR M247 nickel superalloy. The Zr or Hf was doped during low activity CVD aluminizing process using industrial Bernex BPX Pro 325S system. The conducted research showed that Pt and Pd formed the (Ni, Pd, Pt) Al solid solution in the outer additive layer. The higher concentration of palladium in the near surface and in the whole additive layer was detected. The platinum was presented below the surface of aluminide coating. The Zr or Hf was detected mainly in the diffusion zone. The low concentration of Zr (about 0.1 wt.%) in the outer zone was observed. The hafnium was detected mainly in the diffusion zone but in the outer additive layer a small concentration of this element was measured. The obtained results showed that formation of three elements (Pd, Pt) + Zr or Hf modified aluminide coating using proposed technology is possible. The structure of all obtained aluminide coatings was typical for a low-activity, high temperature (LAHT) formation process mainly by outward diffusion of Ni from base material.

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Section: Discussionmentioning

confidence: 99%

Microstructure of Aluminide Coatings Modified by Pt, Pd, Zr and Hf Formed in Low-Activity CVD Process

et al. 2021

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“…Research attempts were also made by performing electrodeposition of different combinations of metals followed by addition of rare earths (such as Zr [ 44 , 47 ], Hf [ 4 , 48 ], and Ce; and their oxides) [ 49 ]. The incorporation of all the above-mentioned elements (Pt, Pd, Zr, Hf) and their combination through electroplating followed by diffusion aluminising was demonstrated to influence the oxidation resistance of aluminide coatings positively.…”

Section: The Role Of Electrodeposition In Thermal Barrier Coatingsmentioning

confidence: 99%

“…This demonstrates the economic competitiveness of choline-based ILs besides its technical advantages. To justify the economic feasibility of IL systems at a practical scale, the cost of the AlCl 3 -NaCl-KCl inorganic molten salt system [ 75 ] and palladium chloride-based electrolyte [ 48 ] is also calculated and presented in Figure 4 . Since the BPyrCl-AlCl 3 -based system and platinum electroplating solutions are too expensive, they are not presented in the figure as this would overtly skew the data.…”

Section: Cost Considerations and Future Challengesmentioning

confidence: 99%

“… Plots showing the cost comparison of the ( a ) ionic liquid-based systems, an inorganic molten salt system for the electrodeposition of Al [ 31 , 72 , 73 , 74 , 75 ], and aqueous electrolyte for the electrodeposition of Pd [ 48 ]; ( b ) the ionic liquid-based systems for the electrodeposition of Al-alloys [ 71 ], considering the initial make up of 1 L solution. Electrodeposition of Al-Ti alloy from solution containing TiCl 2 and TiCl 4 is represented as Al-Ti’ and Al-Ti”, respectively.…”

Section: Figurementioning

confidence: 99%

“…Since the BPyrCl-AlCl 3 -based system and platinum electroplating solutions are too expensive, they are not presented in the figure as this would overtly skew the data. [31,[72][73][74][75], and aqueous electrolyte for the electrodeposition of Pd [48]; (b) the ionic liquid-based systems for the electrodeposition of Al-alloys [71], considering the initial make up of 1 L solution. Electrodeposition of Al-Ti alloy from solution containing TiCl 2 and TiCl 4 is represented as Al-Ti' and Al-Ti", respectively.…”

Section: Cost Considerations and Future Challengesmentioning

confidence: 99%

See 2 more Smart Citations

Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems

Maniam

Paul

2021

Materials

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The increased demand for high performance gas turbine engines has resulted in a continuous search for new base materials and coatings. With the significant developments in nickel-based superalloys, the quest for developments related to thermal barrier coating (TBC) systems is increasing rapidly and is considered a key area of research. Of key importance are the processing routes that can provide the required coating properties when applied on engine components with complex shapes, such as turbine vanes, blades, etc. Despite significant research and development in the coating systems, the scope of electrodeposition as a potential alternative to the conventional methods of producing bond coats has only been realised to a limited extent. Additionally, their effectiveness in prolonging the alloys’ lifetime is not well understood. This review summarises the work on electrodeposition as a coating development method for application in high temperature alloys for gas turbine engines and discusses the progress in the coatings that combine electrodeposition and other processes to achieve desired bond coats. The overall aim of this review is to emphasise the role of electrodeposition as a potential cost-effective alternative to produce bond coats. Besides, the developments in the electrodeposition of aluminium from ionic liquids for potential applications in gas turbines and the nuclear sector, as well as cost considerations and future challenges, are reviewed with the crucial raw materials’ current and future savings scenarios in mind.

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Oxidation behavior of high Hf nickel-based superalloy in air at 900, 1000 and 1100°C

Xiao

Xiong

Wang

et al. 2021

Int J Miner Metall Mater

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Effect of Pd and Hf co-doping of aluminide coatings on pure nickel and CMSX-4 nickel superalloy

Cited by 10 publications

References 20 publications

Microstructure of Aluminide Coatings Modified by Pt, Pd, Zr and Hf Formed in Low-Activity CVD Process

Microstructure of Aluminide Coatings Modified by Pt, Pd, Zr and Hf Formed in Low-Activity CVD Process

Progress in Novel Electrodeposited Bond Coats for Thermal Barrier Coating Systems

Oxidation behavior of high Hf nickel-based superalloy in air at 900, 1000 and 1100°C

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