Low-Friction and Long-Life Solid Lubricant Films Structured of Nanoperiod Tungsten Disulfide and Molybdenum Disulfide Multilayer

概要

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To reduce friction coefficient, hardness is increased by using a nanometer-period multilayer structure and shearing strength is decreased by applying of low-shearing-strength tungsten disulfide and molybdenum disulfide layers. In nanoindentation testing, multilayer films showed a higher hardness and a lower modulus of dissipation energy than single-layer films. In nanoscratch and microwear testing using an atomic force microscope (AFM), both the scratching force and wear rate of multilayer films could be decreased. The friction coefficient of the nanoperiod multilayer film was as low as $\mu=0.04$ in the ball-on-disk tribotest in 52 to 58% humidity conditions. The friction endurance life of the nanoperiod multilayer films evaluated from the cycles in which the friction coefficient increases rapidly is nine times longer than those of single-layer films.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2004-07-15