Abstract
An electrodeposited cobalt alloy coating having a composition of 7.1 ± 0.8 at % tungsten was developed to serve as a diffusion barrier between graphite fibers and nickel. A nickel matrix was electrodeposited around the fibers, and the resulting composite was annealed in vacuum under various time/temperature conditions. The coating was shown to inhibit interdiffusion for up to 24 h at 800°C. This represents an improvement of 200° over the uncoated fibers.
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