Anti-adhesion Mechanism of TiB2-Deposited Ti6Al4V Blade Tip Against Al-hBN Seal Coating During High-Speed Rubbing

Wu, Bi; Gao, Siyang; Xue, Weihai; Li, Shu; Duan, Deli

doi:10.1007/s11249-023-01717-4

Tribol Lett

2023

DOI: 10.1007/s11249-023-01717-4

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Anti-adhesion Mechanism of TiB2-Deposited Ti6Al4V Blade Tip Against Al-hBN Seal Coating During High-Speed Rubbing

Bi Wu

Siyang Gao

Weihai Xue

et al.

Abstract: The TiB 2 coating deposited by magnetron sputtering on the Ti6Al4V simulated blade tip with a dense ber-like microstructure has the adhesion strength grade of HF1. High-speed rubbing results showed that the TiB 2 coating could inhibit the adhesive transfer of the Al-hBN seal coating at 300 m/s. It was found that the tribological oxidation of TiB 2 coating led to the TiB 2 /fused Al interface reaction by characterization of the interface microstructure of the Al-adhesive blade tip. The thin interface reaction i… Show more

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Cited by 3 publications

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Protective coatings for aeroengine blade tips: a review

Yang,

Wu,

Gao

et al. 2024

J Mater Sci

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Protective coatings for aeroengine blade tips: a review

Yang,

Wu,

Gao

et al. 2024

J Mater Sci

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High-Speed Rubbing Behavior Between Nickel-Based Superalloy Blades and Ceramic-Based Abradable Coatings

Yang,

Gao,

Xue

et al. 2023

Tribol Lett

Self Cite

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The tribological behavior of nickel-based superalloy blades with YSZ ceramicbased abradable coatings was investigated using a self-developed high-speed rubbing tester, focusing on the effect of working parameters (linear velocity and incursion rate) on blade and coating damage mechanisms. A non-contact infrared thermometer and a high-speed camera were used to determine real-time changes in coating surface temperature and blade length. The wear morphology and elemental composition of the blade and coating were characterized by a scanning electron microscope, an ultra-depth three-dimensional microscope, and an energy spectrometer. The test results showed that at the same incursion rate, the degree of blade wear tended to increase and then decrease with the increase of linear velocity, and the maximum degree of blade wear was reached at 200 m/s. There was no significant correlation between the degree of blade wear and the incursion rate at the same linear velocity. The linear velocity was the primary influence on driving friction, while the incursion rate became a secondary factor, contrary to the well-known law in metal-based abradable coatings. The main forms of damage to blades included grooving, overheating, and micro-rupture. Plastic removal was the main wear mechanism for blades. The damage mechanism of ceramic-based abradable coatings was mainly characterized by sub-surface cracking. The brittle removal of the coating resulted in "stepped" wear of the blade and a short actual action time of the friction pair. In this paper, the wear mechanisms of nickel-based superalloy blades and ceramic-based abradable coatings were mapped for the first time.

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Designing TiB2/Cr multilayer coatings on Ti6Al4V substrate for optimized wear resistance

Wu,

Gao,

Xue

et al. 2024

Surf. Sci. Tech.

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The difference in mechanical properties between the TiB2 coating and the Ti6Al4V substrate can deteriorate the wear resistance of the TiB2 coating. To enhance the TiB2-based coating’s ability to deform in coordination with the ductile Ti6Al4V substrate and improve its tribological performance, the TiB2/Cr multilayer coatings were designed and deposited on Ti6Al4V substrates by magnetron sputtering. Results reveal that the FEM stress distribution of the TiB2/Cr multilayer coatings was optimized by varying the ceramic–metal thickness ratio (Q). As Q decreased from 1.0 to 0.5, the fracture toughness and adhesion strength of the coatings improved. The multilayer coating with Q = 0.5 exhibited the best toughness, crack propagation resistance (CPRs), and the smallest equivalent stress area, leading to a threefold enhancement in wear resistance compared to the TiB2 monolayer coating. However, further reduction of Q to 0.3 diminished wear resistance due to low hardness and significant stress concentration. Thus, there is an optimal balance between hardness, toughness, and stress distribution for achieving improved wear resistance in the multilayer design. Moreover, a notable correlation was observed between CPRs and the wear resistance of TiB2/Cr multilayer coatings.

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Anti-adhesion Mechanism of TiB2-Deposited Ti6Al4V Blade Tip Against Al-hBN Seal Coating During High-Speed Rubbing

Cited by 3 publications

References 45 publications

Protective coatings for aeroengine blade tips: a review

Protective coatings for aeroengine blade tips: a review

High-Speed Rubbing Behavior Between Nickel-Based Superalloy Blades and Ceramic-Based Abradable Coatings

Designing TiB2/Cr multilayer coatings on Ti6Al4V substrate for optimized wear resistance

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