일방향 탄소섬유/에폭시 복합재에서 이온 도움반응법에 의한 Prepreg 표면처리가 층간분리 인성에 미치는 영향에 대한 연구 = Effects of Prepreg Treatment by Ion Assisted Reaction on the Delamination Toughness of Unidirectional Carbon/Epoxy Composites

다국어 초록 (Multilingual Abstract)

The effect of prepreg treatment by ion Assisted Reaction on the delamination resistance behavior of fiber-reinforced composites was studied in this work Surface of carbon /epoxy prepreg was treated by Ar+ ion irradiation under oxygen environment and the change of contact angle with surface-treament was measured. Two kinds of [O6// O6] DCB (Double Cantilever Beam) specimens were made; 1) DCB specimens of carbon/epoxy prepregs surface-treated by ion Assisted Reaction(Laminate A), 2)DCB specimens of regular carbon/epoxy prepregs (Laminate B). Resistance curve of Laminate A was compared with that of Laminate B in order to determine the effects of prepreg treatment on the resistance behavior. The results show that contact angle was reduced from 81˚ to8˚ by Ar+ ion irradiation of 1x1017 ions/cm2 at 4 sccm oxygen flow rate. Fracture load of Laminate A is higher than that of Laminate B and compliance of Laminate A is lower than that of Laminate B at the same delamination length The results also show that Laminate A exhibits more improved the resistance behavior than Laminate B. Specifically, the stabilized value of GR of Laminate A is 0,26kJ/m2 and that of Laminate B is 0.20kJ/m2, which is a 24% increase of delamination toughness. SEM micrographs of fractured surface show that the increased GIc of Laminate A is mainly due to the decrease of fiber debondings out of matrix at the delamination surface.