碳纤维表面化学复合镀Ni-P-SiC镀层的形貌及性能  

Morphology and Performance of Electroless Composite Plating Ni-P-SiC Coating on Surface of Carbon Fiber

作　　者：杨娟[1] 李国栋[1] 刘阳[1] 刘靖忠 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国表面工程》2017年第1期49-55,共7页China Surface Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB605805)~~

摘　　要：为了同时改善碳纤维与金属铝基体之间的润湿性和分散性,采用化学复合镀的方法在碳纤维上制备Ni-P-SiC复合镀层。通过扫描电子显微镜观察镀层表面和截面形貌,通过单纤维电子强力测试仪分析Ni-P镀层和Ni-P-SiC镀层力学性能,采用同步热分析仪分析Ni-P镀层和Ni-P-SiC镀层的氧化性能。结果表明:Ni-P-SiC镀层的抗拉强度比Ni-P镀层的抗拉强度稍低,但Ni-P-SiC镀层的形状参数m对比Ni-P的形状参数m提高了8.45%,材料的可靠性提高;对比出现最大放热峰的温度,Ni-P-SiC镀层比Ni-P镀层的出现温度高130℃,Ni-P-SiC镀层的抗氧化性明显提高;通过Ni-P-SiC镀层改性后的碳纤维在铝基中分散性明显提高,减少了碳纤维的聚集。Ni-P-SiC镀层有效解决了高温条件下碳纤维与铝基复合的难题。In order to improve the wettability and dispersion of carbon fibers in aluminium substrate, Ni-P-SiC coating was prepared on carbon fiber by electroless composite plating. The surface and cross-sectional morphologies of the coating were observed by scanning electron microscopy （SEM）. Mechanical properties of the Ni-P coating and Ni-P-SiC coating were measured by single fiber electronic tensile strength tester. Oxidation resistance of the Ni-P coating and Ni-P-SiC coating were investigated by synchronous thermal analyzer. Results show that the tensile strength of Ni-P-SiC coating is weaker than that of Ni-P coating, while the shape parameter of Ni-P-SiC coating, m, is increased by 8.45%. The reliability of the Ni-P-SiC coating is improved. The temperature of largest exothermic peak of Ni-P-SiC coating is 130 ℃ higher than that of Ni-P coating, which indicates that the oxidation resistance of carbon fiber in Ni-P-SiC coating is significantly improved after electroless composite plating. Besides, the dispersion of Ni-P-SiC-coated carbon fibers in the aluminium substrate is significantly improved, decreasing the aggregation of carbon fiber. Ni-P-SiC coating effectively solves the problem of composition between carbon and aluminum substrate in high temperature.

关 键 词：碳纤维 化学复合镀 Ni-P-SiC镀层 抗拉强度 抗氧化性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]