摘要
为深入研究复合材料界面特性,分析复合材料界面改性机理,采用原子力显微镜以力调制模式研究了单向碳纤维/聚芳基乙炔(CF/PAA)复合材料横截面的表面形貌和硬度,得到了材料中各相的形态、分布和相对硬度等信息。通过对硬度图像进行统计学分析得到材料表面硬度分布直方图,对不同方法改性后的复合材料界面相特性进行了分析和比较。研究表明,CF未经表面改性处理时,复合材料中无明显的界面相出现,氧化处理后界面上出现硬度变化区域,界面相结构变得复杂,氧化结合高碳酚醛涂层处理后可以获得更为完善的界面相,在纤维与基体间形成一个模量适中的过渡区域,使材料的界面力学性能显著提高。
An atom force microscopy in force modulation mode was adopted to study the cross-section surface of unidirectional carbon fiber/polyarylacetylene （CF/PAA） composites, and the shape, distribution and relative stiffness of various phases were obtained. The probability histogram of surface relative stiffness, obtained by the statistical analysis of the relative stiffness image, was used to compare and study the interphase characters of the composites modified by different methods. The results show that obvious interphase can not be seen in untreated composites, and the structure of the interphase area becomes more complex after oxidation treatment due to the change of stiffness. More perfect interphase can be obtained and a transitional area with moderate modulus can be established between fiber and matrix after the treatment of CF by a combined method of oxidation and coating, so that the mechanical properties of the interface are improved obviously.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第6期85-90,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(No.50333030)
黑龙江省杰出青年基金(No.JC04-12)
关键词
原子力显微镜
碳纤维
PAA
界面相
改性
atom force microscope, carbon fiber
polyarylacetylene
interphase
modification
