Heat durability of carbon fiber reinforced nickel composites

• Main Authors: Shiota Ichiro, Kohri Hitoshi
• Format: Article
• Language: English
• Published: De Gruyter 2011-12-01
• Series: Science and Engineering of Composite Materials
• Subjects: carbon fiber; composite; interfacial reaction; nickel
• Online Access: https://doi.org/10.1515/SECM.2011.052

Carbon fiber is a highly heat resistive material in an oxygen free atmosphere. Nickel is also a heat resistive metal and an important element for a superalloy. We can expect an excellent heat durable composite when they are combined. Nickel was electroplated on a carbon yarn to form a monofilament composite. When the high strength fiber was tested, the composite started to lose its strength at 600°C. The deterioration was caused by graphitization of the carbon in the fiber. This is caused by the difference of the graphitization degree between crystallites in a fiber. A high modulus carbon fiber has little difference of the graphitization degree in a fiber. The high modulus fiber did not react when tested and the fiber strength was maintained after heat treatment at 1100°C for 9 h. From the results, the high modulus carbon fiber composite is promising to be durable at a high temperature.