|About this Abstract
|MS&T23: Materials Science & Technology
|Manufacturing and Processing of Advanced Ceramic Materials
|Mechanisms of Delamination within Co-extruded Silicon Carbide
|Olivia Brandt, Rodrigo Orta, Jeffrey Youngblood, Rodney Trice
|On-Site Speaker (Planned)
Silicon Carbide (SiC) high temperature heat exchangers offer the potential to increase efficiency; however, forming SiC into the desired heat exchanger components is a challenge. Ceramic co-extrusion is a processing technique wherein a feedrod composed of multiple ceramic/polymer systems is extruded several times to reduce feature size. The co-extrusion process relies on the rebundling or lamination of the extrudates via warm-pressing to produce the final components. Lamination is critical to the overall strength as delaminations within or between exudates will manifest as cracks within the final sintered body. This presentation aims to describe the mechanisms that cause delamination and to present approaches to mitigate delamination. Studies on how the polymer blend composition and the thermal degradation behavior of the polymers and polymer systems affect delamination are reported. Mechanical tests and crack analysis were used to gain insight into those variables that most contributed to successful lamination.