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Effects of Duration on Wear Rate of a PTFE Composite

A type of PTFE/MoS2/glass fiber composite has been used as bearing cage material. To study the friction properties, the tests have been performed under various parameters on block-on-ring. The experimental results were as follows: Wear rate of the polymer composites was dramatically affected by test duration. With increase of test duration, the wear rate rapidly decreased. At the sliding velocity of 1.83m/s and load of 45N, the highest wear rate was 8.85×10-15m3/N·m in the test of duration 0.5h, while the lowest was 0.88×10-15m3/N·m in the test of duration 10h (the minimum and maximum times examined).