We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Influence of PTFE as a solid lubricant on the mechanical, electrical, and tribological properties of CF‐reinforced PC composites.
- Authors
Shamsuddin, Muhamad Syukri Mohamed; Othman, Ainur Hanim; Nasir, Ramdziah Md; Hassan, Aziz; Senawi, Rozaimi; Thirmizir, Mohd Zharif Ahmad; Ishak, Zainal Arifin Mohd
- Abstract
The objective of this research was to study the effects of polytetrafluoroethylene (PTFE) as a solid lubricant on the mechanical, electrical, and tribological properties of carbon fiber (CF)‐reinforced polycarbonate (PC) composites. Samples were prepared by means of single‐screw extrusion and injection molding processes. The mechanical tests included tensile, flexural, and failing weight impact tests, while the electrical tests consisted of surface and volume resistivity tests. The tribological testing was conducted under dry sliding conditions using pin‐on‐disk configuration. The results showed that the addition of CF managed to significantly reduce the electrical resistivity as the CF loading approached 10–15 wt%. The addition of PTFE managed to reduce the resistivity of the composite, that is, from 4.51 to 0.53 × 10 (Ωcm). The incorporation of 15 wt%. CF resulted with an increase of 45% in tensile strength and 51.5% in flexural strength, while the addition of PTFE had a negative impact on both properties. It was shown that PTFE was able to reduce the friction coefficient, μ and wear rate, K up to 0.257 and 6.35 × 106 (mm3/Nm), respectively, which can be attributed to the excellent abilities of PTFE to form transfer film. The composite consisting of 15 wt% CF and 10 wt%. PTFE showed highest improvement in term of electrical resistivity, and is deemed the most suitable composition for this study. Scanning electron microscopy was also carried out to further elucidate the fracture and wear mechanism of the PC/CF/PTFE composites.
- Subjects
SOLID lubricants; ELECTRICAL resistivity; FLEXURAL strength; CARBON fiber-reinforced ceramics; IMPACT testing; TENSILE strength; LUBRICATION &; lubricants
- Publication
Journal of Applied Polymer Science, 2021, Vol 138, Issue 18, p1
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.50346