セラミック粒子分散被覆によるチタン合金の表面硬化

概要

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A ceramic particle dispersed layer was formed on the surface of Ti-6Al-4V alloy by the eutectic reaction between Ni in the substances WC-Ni or Cr^3C^2-Ni and Ti of the base material. The melt reaction and the organizational structure of the ceramic particle dispersed layer, and the frictional properties of the titanium alloy after surface coating were investigated. The principal results are as follows. The melt reaction is more frequent with heating of 1273K or more. However, higher heating temperatures are needed as the number of ceramic particles increases. Ceramic particles are dispersed uniformly on the surface coating layer. All ceramics used were changed into TiC particles by the difference of the carbide formation energy. The friction coefficient was stabilized with a large distribution quantity of Cr^3C^2 particles, and the coefficient showed 0.19. Excellent frictional properties were obtained over a long period of time.
工学院大学の論文
2007-04-30