Tribological properties of textured stator and PTFE-based material in travelling wave ultrasonic motors

This study fabricated textures on the stator surface of a traveling wave ultrasonic motor (USM) using laser and investigated the tribological behavior of a polytetrafluoroethylene (PTFE) composite friction material and stator. Initially, the effect of textures with different densities was tested. As...

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Bibliographic Details
Published in:Friction 2020-04, Vol.8 (2), p.301-310
Main Authors: Li, Jinbang, Zeng, Shuaishuai, Liu, Shuo, Zhou, Ningning, Qing, Tao
Format: Article
Language:English
Subjects:
Abrasive wear
Adhesive wear
Braking systems
Corrosion and Coatings
Debris
Engineering
Friction
Mechanical Engineering
Motors
Nanotechnology
Physical Chemistry
Polytetrafluoroethylene
Product design
Research Article
Stators
Surface layers
Surfaces and Interfaces
Texturing
Thin Films
Traveling waves
Tribology
Wear mechanisms
Wear particles
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Summary:This study fabricated textures on the stator surface of a traveling wave ultrasonic motor (USM) using laser and investigated the tribological behavior of a polytetrafluoroethylene (PTFE) composite friction material and stator. Initially, the effect of textures with different densities was tested. As the results suggested, the generation of large transfer films of PTFE composite was prevented by laser surface texturing, and adhesive wear reduced notably despite the insignificant decrease in load capacity and efficiency. Next, the 100-h test was performed to further study the effects of texture. Worn surface and wear debris were observed to discuss wear mechanisms. After 100 h, the form of wear debris changed into particles. The wear mechanisms of friction material sliding against the textured stator were small size fatigue and slight abrasive wear. The wear height of friction material decreased from 3.8 μm to 1.1 μm. This research provides a method to reduce the wear of friction materials used in travelling wave USMs.
ISSN:2223-7690
2223-7704
DOI:10.1007/s40544-018-0253-3