碳纤维碳化特征的SAM微观分析

本文应用SAM方法检测了由不同工艺条件造成的碳纤维的污染和产生的缺陷。对任意一根碳纤维,其表面和内部的碳俄歇峰、峰高和峰形都有差异,这一差异导致碳沿径向分布不均匀,并影响到碳纤维的力学性能。采用SAM的方法可监测予氧化和碳化过程中的工艺参数以便提高碳纤维的质量。 

ANALYSIS OF THE CARBONIZATION FOR CARBON FIBER BY USING SAM

In order to obtain quality carbon fiber, it is necessary to get theinformation about the fiber processing.The paper here discribes the analysis of different processed carbon fibers on cross sections by the use of Scanning Auger Microprobe (SAM).The sample of carbon fiber is displayed on the scanning electron microscope(SEM) with the magnification of 104 times and then tests are done within a single f fiber.The Auger line scanning and the point analysis for carbon fibers,with the tensile strength of 3.43 GPa, 3.13 GPa and 2.45 GPa, respectively,are taken.The difference of carbonization state between the skin and the core of a carbon fiber in the chemical reactions of different preoxidation and carbonization can be observed in both the intensity of the carbon signal and the shape of the Auger peaks.