Method for Preparing Metal Matrix Composites Containing Modified Polytetrafluoroethylene.
DEPARTMENT OF THE AIR FORCE WASHINGTON D C
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The patent describes a self-lubricating composite. Polytetrafluoroethylene, sold under the trademark Teflon, is modified before being blended with metal powder and formed into a composite. Modification is accomplished by heating the Teflon for 1 to 2 hours at 1,000-1,100F and then for 3 to 3.5 hours at 650 to 750F. Metal matrix composites containing modified Teflon as a filler are useful as retainer materials for bearings which are subjected to high temperature operating conditions.
- Laminates and Composite Materials
- Lubricants and Hydraulic Fluids