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The origins of friction and wear of the thin metallic layer of metal evaporated (ME) magnetic tapes were determined at an asperity level using a modified commercial video cassette recorder (VCR) as a tape transport, magnetometer and tribometer. The VCR was instrumented to measure friction force between the rotary heads and tape, head-to-tape spacing to nanometer vertical resolution, and sub-microsecond...
Sliding behaviors of a unidirectionally oriented Si 3 N 4 -whisker-reinforced Si 3 N 4 composite has been studied in different directions with respect to the orientation of the Si 3 N 4 whisker grains by using a ball-on-disk reciprocating sliding apparatus. The results show that the friction and wear behaviors are much different in different sliding...
Controlled residual stress field, induced by conventional and ultrasonic shot peening in some reference materials has been measured using X-ray diffraction. Its influence on the tribological behavior of these treated samples has been studied and its evolution during the fretting tests has been followed and related to the observed wear mechanisms.
Radial lip seals made from PTFE-compounds are used more and more frequently for the sealing of crank shafts in the automotive industry. Due to wear the seal loses material and finally fails. State-of-the-art is the experimental determination of the tribological behaviour on a test rig with pin-on-disc apparatus with the help of which the wear behaviour of sealing systems, especially of PTFE seals,...
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