| Titre : |
Friction-free covering layer : Slide modification of POM with PTFE microparticles (Part 2) |
| Type de document : |
texte imprimé |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 49-52 |
| Langues : |
Anglais (eng) |
| Catégories : |
Essais dynamiques
Lubrifiants
Particules (matières)
Polyacétals
Polyoxyméthylène
Polytétrafluoréthylène
Tribologie (technologie)
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
Solid lubricants such as PTFE offer advantages over oils, greases or silicones in conveying systems. Research on low friction and wear was conducted on a lubricant system with POM core and PTFE surface layer. The second part of this article describes the influencing factors, material properties, and processing of such a compound material. |
| Note de contenu : |
- Fig. 1 : Spherulite formation in filled POM with 20 % PTFE. The crystallizations time was 600 s at a temperature of 152 °C. The images from the shear cell were made with polarized transmitted light
- Fig. 2 : Optical microscopy images in polarized light: following a pure POM (a), a uniform distribution of PTFE (dark areas) is visible in the POM surface layer with contents of 1 % (b), 5 % (c), and 20 % (d) (all: 6 mm panel, 400-fold magnification
- Fig. 3 : Changes in strength, elastic modulus, and rigidity as a function of PTFE content. Determined in a short-term tensile test acc. to DIN EN ISO 527 on injection-molded tension rod samples
- Fig. 4 : Coefficient of friction as a function of surface pressure at a sliding speed of 0.25 m/s. Determined with a pin-on-disk tribometer and a pairing of POM disk with PTFE content and a PE-UHMW pin
- Fig. 5 : Coefficient of friction in the 24 h endurance test of POM with 20 % PTFE, a sliding speed of 0.3 m/s, and a surface pressure of 1 N/mm². Also determined on a pin-on-disk tribometer with the pairing of POM disk with 20 % PTFE and a PE-UHMW
- Fig. 6 : Surface analysis of POM 5% PTFE with a perthometer before (left) and after (right) test on the pin-on-disk tribometer [1]. During running-in, the dark red PTFE particles are exposed and distributed on the surface
- Fig. 7 : Optical microscope image (polarization optics) of the boundary layer between the unfilled POM core material (below) and the slide surface with POM and 20 % PTFE (above). The materials combine almost completely |
| En ligne : |
https://drive.google.com/file/d/1vu3P9kWBr8s21tKEKpP2_ufwJtINY9Kq/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32992 |
in KUNSTSTOFFE INTERNATIONAL > Vol. 109, N° 6-7 (06-07/2019) . - p. 49-52
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