FABRICATION OF CARBON/ALUMINIUM PREFORM WIRES USING K₂ZrF₆ SOLUTION TO TREAT SiC COATED CARBON FIBER

Carbon fiber/aluminium preform wires were fabricated by the liquid metal infiltration method after carbon fiber were coated with SiCard treated with K₂ZrFe₆ solution.The strengths of the wires were about 70% of the strength calculated according to the "rule of mixture".The strength of preform wire with fiber volume fraction of 54% was about 1200 MPa.The SEM fractography of preform wire showed that the interfacial state was adequate.Through x-ray diffraction analyse of the reaction product of SiC,K₂ZrF₆ and Al at high temperature,it can be coneluded that the improvement of wetting ability between carbon fiber and aluminium was resulted from the active reaction of K₂ZrF₆,aluminium and SiC.