黒鉛/アルミニウム間のぬれと接着性並びに炭素繊維/アルミニウム複合材料の強度劣化に及ぼす中間金属被覆層の効果

抄録

Metal coating on carbon fiber by ion-plating method was investigated in order to improve the compatibility of carbon fiber with aluminum. Eleven metals, copper (Cu), boron (B), titanium (Ti), zirconium (Zr), silicon (Si), tantalum (Ta), chromium (Cr), molybdenum (Mo), iron (Fe), nickel (Ni) and aluminum (Al) were used as coating materials. The wettability and bonding ability with aluminum were evaluated by simulating experiments with graphite plate as a substrate for carbon fiber. All metal coatings considerably improve the wettability of graphite plate with aluminum, and in particular Fe, Ni and Cu bring very excellent wetting. On the other hand, Al coating fairly improves the bonding ability of graphite with aluminum while other metal coatings bring extremely excellent bonding. The carbon fibers coated with metals except Cu are degradated considerably in strength after heating at 873K because of reaction with the coated ones. All carbon fibers coated first with one of the metals and then with aluminum are degradated extremely in strength after heating at 873K because of formation of the brittle intermetallic compound between the coated metal and aluminum.