(中南大學(xué) 粉末冶金國家重點實驗室， 長沙 410083)
摘 要: 采用XRD平均峰位法測定了4種C/C復(fù)合材料的石墨化度。 研究結(jié)果表明： 用平均峰位法測定C/C復(fù)合材料的石墨化度具有簡便可靠、 區(qū)分度高的優(yōu)點。 當(dāng)C/C復(fù)合材料中炭纖維的含量低于基體炭含量時， 難石墨化的炭纖維對C/C復(fù)合材料XRD譜線低角度一側(cè)的線形有一定影響， 但對最終的測量結(jié)果影響不大。
關(guān)鍵字: XRD； C/C復(fù)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
