Material Transfer Behavior between a Blade and Two Types of Coating during High-Speed Rubbing

ABSTRACT

The material transfer behaviors of Al-hBN and NiAl-hBN coatings rubbed by a Ti6Al4 V blade at different linear speeds and single pass depths were studied using a high-speed rubbing tester. The blade height variation analysis, morphologies, energy-dispersive spectroscopy, and X-ray diffraction studies of the blade and the coating wear scars indicated that the coating material transferred to the blade during rubbing with the Al-hBN coating. For the NiAl-hBN coating, the blade material transferred to the coating. The temperature differences at the interface, varying melting points of the coatings, and blade plastic flow softening under high temperatures were regarded as factors for different material transfer behaviors.

KEYWORDS:

• Abradable seal coating
• high-speed rubbing
• material transfer
• flash temperature

Additional information

Funding

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).