Abstract
The high-speed rubbing wear behavior between a Ti6Al4V blade and a NiAl-hBN seal coating was studied with a high-speed rub test rig. Blade wear behavior, which had not received enough attentions, was the key concern of this study. The rub tests conducted at different linear speeds and single-pass depths indicated that although wear distance was constant and rub forces decreased at high linear speed, blade wear increased with the increment of linear speed when single-pass depth was invariable. According to scanning electron microscopy, x-ray diffraction, electron probe microanalysis and microhardness analyses of the wear scars, different blade and coating wear mechanisms were observed when rubbed at different linear speeds. Remarkably, when rubbing was done at high linear speed, there was severe blade oxidation with the generation of oxidation layer full of cracks and high-hardness transfer layer in the coating wear scar, and these were identified as reasons of aggravated blade wear.
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Acknowledgments
This work was funded by the National Natural Science Foundation of China (Grant No. 50675215), the Tribology Science Fund of State Key Laboratory of Tribology (Grant No. SKLTKF15B09) and Innovation Foundation of China Aviation Industry Corp. (Grant No. 2010E41018). The authors are very thankful to Dr. Innocent O. Arukalam (Nigeria) for suggestion and modification of English.
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Xue, W., Gao, S., Duan, D. et al. Ti6Al4V Blade Wear Behavior During High-Speed Rubbing with NiAl-hBN Abradable Seal Coating. J Therm Spray Tech 26, 539–553 (2017). https://doi.org/10.1007/s11666-016-0511-8
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DOI: https://doi.org/10.1007/s11666-016-0511-8