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The Formation of a Modified Surface Layer on Elastomeric Materials.

M Khafidh1,2, D J Schipper1, M A Masen3

  • 11Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands.

Tribology Letters
|March 16, 2019
PubMed
Summary

Sliding elastomers form a modified surface layer, altering mechanical properties and friction. This study investigates silica-reinforced elastomer layer formation, dependent on pressure, velocity, and sliding distance, and proposes a predictive model.

Keywords:
ElastomerModified surface layerSliding frictionWear

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Area of Science:

  • Materials Science
  • Tribology
  • Polymer Science

Background:

  • Surface modification of elastomers during sliding contact influences their mechanical properties and friction.
  • Understanding the formation and characteristics of these modified surface layers is crucial for predicting elastomer behavior.
  • Elastomers reinforced with silica are widely used, making their surface modification a key area of study.

Purpose of the Study:

  • To investigate the formation of a modified surface layer on silica-reinforced elastomers during sliding friction.
  • To determine the influence of contact pressure, velocity, and counter-surface roughness on layer formation.
  • To develop a predictive model for the volume of the modified surface layer formed.

Main Methods:

  • Sliding friction experiments were conducted using a pin-on-disc tribometer.
  • Key parameters varied included contact pressure, velocity, and counter-surface roughness.
  • Scanning electron microscopy (SEM) was employed to analyze the existence and characteristics of the modified surface layer.

Main Results:

  • The formation of a modified surface layer is a result of the balance between layer formation rate and wear rate.
  • Layer formation is dependent on contact pressure, velocity, and sliding distance.
  • A general formulation for calculating the volume of the formed layer was proposed, alongside a formation map.

Conclusions:

  • The formation of a modified surface layer on silica-reinforced elastomers is controllable by adjusting sliding parameters.
  • The developed formulation and map provide valuable tools for predicting and optimizing elastomer surface modification in tribological applications.
  • This research contributes to a deeper understanding of elastomer-friction interactions and surface engineering.