|
| Abstract No.: |
|
Scheduled at:
|
Monday, May 03, 2010, Olivia Room 2:00 PM
HVOF 1
|
|
| Title: |
Functionalization of high performance polymers by the use of a combined HVOF process for powder and wire
|
|
| Authors: |
Christian Rupprecht* / Chemnitz University of Technology, Germany
Bernhard Wielage / Institute of Composite Materials, Germany
Gerd Paczkowski/ Institute of Composite Materials, Germany
|
|
| Abstract: |
High-performance polymers such as polyetheretherketon (PEEK) or the aromatic polyaryletherketon (PEAK) show an enormous toughness, a good strength at high temperatures (250 °C or temporarily 350 °C) and a low density. Hence, these materials are of great interest for the automotive and aircraft industry. Some applications cannot be realized sufficiently at present, in particular if strong ultra-violet radiation or high abrasive wear interfere with the surface. Another disadvantage is the bad shielding against electromagnetic fields.
This paper presents methods and strategies for the improvement of the surface properties of high-grade polymers. A combined HVOF process for powder and wire is utilized. In the first step, a metallic bond coating is sprayed using wire. The completely molten particles lead to good bonding between substrate and coating. The impinging droplets cause less abrasion to the surface than the powder particles. In the second step, cermet powders are used as feedstock material for the top coating. They are responsible for the requested tribological behaviour, low friction, high abrasive wear resistance and good fail-safe properties. The achieved results are compared with the demands of the industry and are intended to demonstrate the high potential of the HVOF technology for the surface finishing of polymers.
|
|