This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of the Tribological Property of Resin Coating by the Addition of Nylon and Graphite Particles
Technical Paper
2012-32-0090
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A resin coating was applied to a piston skirt for use in an
internal combustion engine to reduce the frictional resistance on
its surface. The purpose of the authors' study was to observe
the change in surface states with the addition of nylon and
graphite to the coating as solid lubricant particles in order to
investigate the tribological properties of the surface. The authors
observed self-formed microdimples on the resin surface when nylon
particles were added to the polyamide-imide (PAI) coating material.
These microdimples functioned as oil reservoirs similar in size to
the nylon particles.
The authors used PAI as a binder, and graphite particles (5 μm)
and two different grades (5 and 10 μm) of nylon-12 particles as
additives. These materials were mixed in a solvent, and an aluminum
test sample was coated. The test sample was then heated in an oven
to cure the PAI. Next, the texture of the surface was observed. The
tribological properties were measured with a ball-on-disk
tribometer under both oil lubrication and dry conditions.
When only graphite particles were added to PAI, microdimples did
not form on the surface of the coatings. However, the authors
observed microdimples when both nylon and graphite particles were
added. Sliding tests under oil lubrication showed a minimum value
of the friction coefficient when 3-5 vol% of nylon was added. The
addition of nylon particles to the graphite/PAI mixture decreased
the friction coefficient at slow sliding speeds. Under the dry
condition, the addition of a small amount of nylon did not affect
the coefficient, but the friction coefficient decreased as the
amount of graphite particles increased.
Topic
Citation
Suzuki, N. and Hikasa, A., "Evaluation of the Tribological Property of Resin Coating by the Addition of Nylon and Graphite Particles," SAE Technical Paper 2012-32-0090, 2012, https://doi.org/10.4271/2012-32-0090.Also In
References
- Tung, S. C. McMillan, M. L. “Automotive tribology overviews of current advances and challenges for the future,” Tribology International 37 2004 517 536
- Krzyzak, Z. Pawlus, P. “‘Zero-wear’ of piston skirt surface topography,” Wear 206 2006 554 561
- Mihoya, M. Nomura, M. Ozaki, Y. Surface Finishing for Aluminum “BF-Coating,” SUZUKI TECHNICAL REVIEW 27 2001 25 29
- Akita, S. Hayashi, T. Mihoya, M. “Development of “BF-Coat” for Snowmobile Piston,” SUZUKI TECHNICAL REVIEW 29 2003 65 69
- Ogihara, H. “Research Into Surface Improvement for Low Friction Pistons,” SAE Technical Paper 2005-01-1647 2005 10.4271/2005-01-1647