|About this Abstract
||MS&T23: Materials Science & Technology
||Additive Manufacturing of Ceramic-based Materials: Process Development, Materials, Process Optimization and Applications
||The Influence of Print Layer Orientation on the Mechanical Properties of SIC and CF/SIC CMCS Formed via Direct Ink Writing
||Rodney W. Trice, Kyle Cox, Jeffrey Youngblood
|On-Site Speaker (Planned)
||Rodney W. Trice
Silicon carbide (SiC) is a useful ceramic due to its excellent mechanical properties at high temperature, making it a candidate material for advanced applications such as leading edges for hypersonic flight. In this study, monolithic SiC and carbon fiber reinforced (Cf)/SiC ceramic matrix composites were additively manufactured via direct ink writing (DIW). Carbon-fiber loading was 10 vol%, while overall solids loading was held constant at 53 vol.%. When added to the ink, fibers were aligned parallel to the direction of the nozzle print path. Characteristic strengths for monolithic SiC and 10 vol.% Cf/SiC samples were nominally the same for the 0o print path, measuring 360-375 MPa. However, the Weibull modulus for the 10 vol.% Cf/SiC samples was greater than the monolithic SiC samples. SEM and optical microscopy were used to analyze printed parts, showing a high degree of fiber alignment in the direction of the print, and fiber pullout.