DEVELOPMENT OF CFRP-CERAMIC HYBRID MATERILALS APPLIED BY ION BEAM AND EVALUATION OF MECHANICAL PROPERTIES OF DEVELOPED MATERIALS

碳纤维复合材料的基材是含有滑石粉的聚醚酰亚胺。在碳纤维增强塑料上镀铜膜，然后在铜膜上镀铬膜。在1kV的加速电压下，用动态混合法将氮离子注入到碳纤维增强塑料上的铬铜薄膜中，注入后的样品分别在333、363、393和423K下进行30min的退火处理。无论离子注入与否，铬铜薄膜的顶面显微硬度均为4000，且随深度的增加而降低。在深度为0.5 mm时，金属膜的显微硬度大于CFRP。当温度达到363K时，金属膜的结合强度随退火温度的升高而增加，当温度超过363K时，结合强度下降。残余应力主要表现为金属膜上表面的拉应力。当热处理温度为393K时，残余拉应力最大。离子注入金属薄膜在室温下存在较高的残余拉应力。薄膜的结合强度受残余应力的影响，镀金属可使薄膜的抗拉强度和弯曲强度提高7-11%。但离子注入对拉伸强度和弯曲强度的提高影响不大。碳纤维增强塑料的摩擦系数为0.1，铬铜膜为0.9，注入膜为0.8。金属膜的磨损量是CFRP的100倍。

The base plastic of CFRP is polyetherimide with talc. The Cu film was galvanized onto the CFRP and then the Cr film was plated on the Cu film. The nitrogen ion was implated in Cr-Cu film on CFRP by using dynamic mixing method under an accelerated voltage of 1kV.After implantation, the samples were annealed at 333, 363, 393 and 423K for 30min. The microhardness of Cr-Cu film was 4000 at the top surface, regardless of ion implantaion, and decreased with increasing the depth. For 0.5mm of depth, the microhardness was greater for metal film than for CFRP.The adhesive strength of metal film increased with increasing annealing temperature to 363K.When the annealing temperature was over 363K, it decreased. The residual stress was tension on the top surface of metal film. The maximum residual tensile stress was obtained at the annealing temperature of 393K.For ion implanted metal film, there was high residual tensile stress at room temperature. The adhesive strength of film was affected by the residual stress.The tensile strength and bending strength were improved by metal plating up to 7-11%. But the ion implantation scarecely affected the improvement of tensile strength and bending strength. The friction coefficient was 0.1 for CFRP, 0.9 for Cr-Cu film and 0.8 for implanted film. The wear volume of ball increased 100 times greater for metal films than for CFRP.