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Using Thin Ultra-High-Molecular-Weight Polyethylene Coatings to Reduce Friction in Frost-Resistant Rubbers
Elena Torskaya1, Ivan Shkalei1, Fedor Stepanov1
1Ishlinsky Institute for Problems in Mechanics RAS, 119526 Moscow, Russia.
Polymers
|October 26, 2024
Summary
Applying thin ultra-high-molecular-weight polyethylene (UHMWPE) coatings to rubber rings significantly improves their antifriction and wear resistance. Optimal performance was observed with a 600 μm coating thickness, enhancing durability for friction applications.
Area of Science:
- Materials Science
- Tribology
- Polymer Engineering
Background:
- Frost-resistant rubbers are crucial for friction units but suffer from high friction and low wear resistance, necessitating frequent replacement.
- Existing rubber materials limit performance in demanding friction applications due to inherent tribological limitations.
Purpose of the Study:
- To investigate the application of ultra-high-molecular-weight polyethylene (UHMWPE) coatings on rubber rings to enhance their tribological properties.
- To determine the optimal coating thickness for improved friction coefficient and wear resistance.
Main Methods:
- Friction tests using a ball-on-disk method under various loads and velocities.
- Microscopy analysis of friction tracks to assess wear.
- Finite element modeling of the sliding contact and thermal behavior of the coated materials.
Main Results:
- A minimum friction coefficient was achieved with UHMWPE coatings of 600 μm thickness.
- Coatings of 300 μm showed minimal surface changes, indicating good wear resistance.
- The study established relationships between coating thickness, sliding velocity, and frictional heating.
Conclusions:
- UHMWPE coatings enhance the antifrictional properties and wear resistance of rubber rings.
- A 600 μm coating thickness offers the best balance of performance, while thinner coatings also provide protection.
- This polymer combination preserves the essential damping characteristics of the rubber base.
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