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.
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