The modification of carbon fiber surface of 3-D woven preform and its effects on the intefracial bond properties

摘要

The air-cold plasma treatment of carbon fiber surface in 3-D orthogonal woven preforms is investigated in this paper, and the single fiber push-in (microdebonding) technique is developed to evaluate the interfacial bonding strength between fiber and matrix. It is observed that the wetting performance and the interfacial properties have been increased greatly, and the interfacial characteristic between fiber and matrix in interior region of woven is the same as that in surface region after the woven fabric is treated. The loss of tension properties due to treatment is also investigated and found to be small in the range of useful treatments.