(中南大学 粉末冶金国家重点实验室， 长沙 410083)
摘 要: 采用XRD平均峰位法测定了4种C/C复合材料的石墨化度。 研究结果表明： 用平均峰位法测定C/C复合材料的石墨化度具有简便可靠、 区分度高的优点。 当C/C复合材料中炭纤维的含量低于基体炭含量时， 难石墨化的炭纤维对C/C复合材料XRD谱线低角度一侧的线形有一定影响， 但对最终的测量结果影响不大。
关键字: XRD； C/C复合材料； 平均峰位法； 石墨化度
average X-ray diffraction angle method
（State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China）
Abstract:Graphitization degree of four kinds of carbon-carbon(C/C) composites were measured by X-ray diffraction. A modified diffraction angle, namely, the average diffraction angle was chosen to calculate the graphitization degree of C/C composites, and the improper characterization of the graphitization degree of C/C composites by the conventional diffraction angle based on the peak position of the diffraction profile can be avoided. The results show that the average diffraction angle method has the characteristics of simplicity, reliability and higher discrimination in terms of measuring the graphitization degree of C/C composites. It is also shown that though the carbon fibre which is not easily graphitized has measurable effect on the low-angle diffraction profile of C/C composites, it has no marked influence on the results obtained by the average diffraction angle method.
Key words: X-ray diffraction; C/C composites; average diffraction angle method; graphitization degree
