Two types of SiC fibers, one is low-oxygen and carbon-rich fiber denoted by 601-4 and the other is low-oxygen and near-stoichiometric Tyranno SA, were irradiated with 450 keV C⁺ ions at room temperature. The Raman spectra indicate that irradiation induced distortion and amorphization of SiC crystallites in fibers. TEM characterization of Tyranno SA suggests that SiC crystallites undergo a continued fragmentation into smaller crystalline islands and a continued increase of surrounding amorphous structure. The SiC nano-crystallites (<15 nm) in 601-4 fiber are more likely to be amorphized than larger crystallites (∼200 nm) in Tyranno SA. The hardness and modulus of 601-4 continuously decreases with increasing fluence, while that of Tyranno SA first increases and then decreases.

室温下用450 keV C ⁺离子辐照两种类型的SiC纤维，一种是低氧和富碳纤维，用601-4表示，另一种是低氧和化学计量接近的Tyranno SA 。拉曼光谱表明，辐照引起纤维中SiC微晶的变形和非晶化。Tyranno SA的TEM表征表明SiC微晶不断碎裂成较小的晶岛，并且周围非晶结构不断增加。与Tyranno SA中的较大微晶（〜200 nm）相比，601-4光纤中的SiC纳米微晶（<15 nm）更有可能被非晶化。随着通量的增加，601-4的硬度和模量连续降低，而Tyranno SA的硬度和模量先升高然后降低。