Proper preparation of polymer / graphite composites is required because the properties of the matrix material and the graphite particles vary significantly in both hardness and fracture toughness. As a general rule, the most difficult component to prepare in composite materials are the most brittle component (e.g. graphite particles). To properly polymer-graphite composites, initial sectioning must minimize damage. This is generally accomplished with a fine grit diamond wafering blade. Proceeding preparation steps must not add additional damage, this is accomplished by a matching the proper abrasive to to the proper polishing surface.
SECTIONING
Diamond Wafering blade - fine grit / low concentration
MOUNTING
Castable Mounting with Epoxy or Acrylic resins
POLISHING
Abrasive/surface |
Lubricant |
Force/ sample |
Time |
320 grit SiC paper |
Water |
5 lbs |
Until plane |
6 um DIAMAT diamond on TEXPAN pad |
DIALUBE Purple Extender |
3-5 lbs |
3 minutes |
1 um DIAMAT diamond on DACRON pad |
DIALUBE Purple Extender |
3-5 lbs |
2 minutes |
| 0.05 um NANOMETER Alumina on MICROPAD pad | 3-5 lbs | 45 seconds |
 |
Polymer / Graphite Composite, as polished, 200X (B.F.) |