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  • Good grease, good landing
    in both defensive and offensive measures. No longer in production, new parts need to be custom fabricated, thus the military search for better corrosion protection. Bearing cup assembled with MIL-PRF-81322 grease (top) showed extensive corrosion after the 10-day wash test and actually seized
  • Slick as a whistle, hard as a rock
    Nibron, a coating of nickel, thallium, and boron, improves wear and hardness on aerospace and automotive components. Several military jets, including the Air Force's new fighter, the F-22 Raptor, have engine components coated with Nibron to reduce wear. This chart shows that Nibron is harder than
  • Polyimide composites challenge metals
    A variety of polyimide composite materials produce cost-effective alternatives to cast-metal parts. Edited by Jean M. Hoffman The bushings, bearing pads, and splines in the 10-stage, high-pressure compressor of the Rolls-Royce BR710 turbofan engine are made from Vespel polyimide. These parts