• Hausberger, Andreas
• Kappl, Clemens
• Stiller, Tanja
• Grün, Florian
• Hensgen, Lars

Abstract

<p>Technical thermoplastic materials (e.g., PEEK, PPA and POM) are widely used for tribo-logical applications combined with different filler systems (e.g., glass-or carbon fibres) because of their excellent mechanical properties. The friction and wear behaviour of thermoplastics can be specifically improved by solid lubrication systems such as graphite, PTFE and MoS₂. Besides these systems, others such as WoS₂ and MnS are becoming scientifically interesting. This work investigates the influence of different solid lubricants—alternative metal sulphides and polymer-based—in com-bination with different glass fibre contents on the tribological behaviour of unfilled PEEK and glass fibre-filled PPA. For this purpose, compounds were produced and injection-moulded into tribological test specimens that were subsequently tested. It is particularly evident for both matrix materials that the solid lubricant SLS 22 shows a 25% wear rate reduction when compared to MoS₂ and, in addition, the proportion of fibre content in PPA shows an additional wear rate reduction by a factor of 10. The friction level could be kept at a similar level compared to the usually utilised solid lubricants. The investigations showed the potential use of metal sulphide filler systems in high-performance thermoplastic with enhanced tribological properties as alternatives to the well-established solid lubricants.</p>

Topics

• impedance spectroscopy
• compound
• Carbon
• glass
• glass
• thermoplastic
• static light scattering