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本实验是对以聚丙烯腈为原料的碳纤维进行化学镀铜和化学镀镍,得到了均匀的镀层,然后在纯度为99.5％的氢气保护下经400～950℃温度范围2小时的热处理,再测量它们的室温断裂强度。同时用扫描电镜作了形貌观察,且对镀层元素在高温下对碳纤维的结构的影响用电子探针显微分析法、X—射线衍射分析法以及扫描电镜进行探测和观察,特别对镀镍的碳纤维。最后着重讨论经高温处理后纤维上镀层的剥离机理。
In this experiment, carbon fiber with polyacrylonitrile as raw material was electroless copper plated and electroless nickel plated to obtain a uniform coating which was then heat-treated in the temperature range of 400-950 ° C for 2 hours under the protection of 99.5% pure hydrogen. Measure their room temperature rupture strength. At the same time, the morphology was observed by scanning electron microscopy, and the influence of the element on the structure of the carbon fiber at high temperature was observed and observed by electron probe microanalysis, X-ray diffraction analysis and scanning electron microscopy, especially for nickel Of carbon fiber. Finally, the mechanism of stripping the coating on the fiber after high temperature treatment is discussed.