The effect of weaving parameters on the mechanical behaviors of liquid silicon infiltration (LSI)-derived 3D-woven C/SiC having orthogonal through-the-thickness (OT) and layer-to-layer (LTL) patterns

초록

3D weaving technology has received attention due to its advantages in near-net-shape preforming. However, various processing parameters and the requirements for an expensive and sophisticated setup for 3D weaving inhibit the accessibility of this technology. For this reason, we discussed weaving strategies for fabricating 3D-woven carbon textiles having OT (orthogonal through-the thickness) and LTL (layer-to-layer) patterns using a narrow needle loom. A series of channels was introduced in the OT textile to facilitate resin flow by reducing the weft density during weaving. The LTL textile featured a 4-harness satin pattern, which is commonly applied to aircraft composite parts. The textiles were densified using LSI to form C/SiC composites. The degree of densification and the yarn structure were investigated. Through the four-point bending test, OT-C/SiC exhibited higher flexural strength and toughness compared to LTL-C/SiC, despite its lower weft density.