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碳的结晶分为金刚石、石墨和过渡态碳三种形式。碳纤维中主要是石墨和过渡态碳两种形式,而过渡态碳包括无定形碳,乱层石墨结构和一些三维石墨结构。碳纤维是一种应用广泛的新型非金材料,它的形态结构与原丝和热处理条件有关,原丝在加热碳化过程中,原丝中原纤的择优取向,单丝横截面形状等都保留在碳纤维中。本文采用离子刻蚀方法,将碳纤维表面及横截面上的无定形碳和少量乱层石墨结构刻蚀掉,用SEM
Carbon crystal is divided into diamond, graphite and transitional carbon in three forms. Carbon fiber is mainly graphite and transitional carbon in two forms, and transitional carbon includes amorphous carbon, chaos graphite structure and some three-dimensional graphite structure. Carbon fiber is a widely used new non-gold material. The morphological structure of the carbon fiber is related to the original filament and the heat treatment conditions. During the heating and carbonization of the precursor filament, the preferred orientation of the fibril in the precursor filament and the cross-sectional shape of the filament remain in the carbon fiber in. In this paper, ion etching method, the carbon fiber surface and the cross-section of amorphous carbon and a small amount of chaos graphite structure is etched away by SEM