| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
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| Symposium
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Additive Manufacturing of High and Ultra-high Temperature Ceramics and Composites: Processing, Characterization and Testing
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| Presentation Title |
Interpenetrating Phase Heterogeneous Ceramic-refractory Metal Composite Materials Created via Additive Manufacturing |
| Author(s) |
David J. Mitchell, Christopher C. Ledford, Trevor G. Aguirre, Corson L. Cramer, Steven E. Bullock, Michael M. Kirka, Michael J. Lance, Tomas Grejtak |
| On-Site Speaker (Planned) |
David J. Mitchell |
| Abstract Scope |
Refractory metals and ceramics have excellent ultra-high temperature properties, yet both typically exhibit brittle failure behavior, and refractory metals can have oxidation issues at high temperatures. Continuous fiber ceramic matrix composites (CMCs) have demonstrated that composite microstructures can provide a material with brittle reinforcing and matrix phases that exhibits damage tolerance and graceful failure behavior. However, continuous fiber CMCs are labor intensive and expensive to produce, limiting their applicability. The goal of this project was to create an interpenetrating phase composite (IPC) material of ceramic and refractory metal via additive manufacturing (AM) that demonstrated damage tolerant behavior. IPCs were fabricated from materials such as silicon carbide, zirconium diboride, tungsten and molybdenum. Refractory metal lattices were created via e-beam melting AM, then infiltrated with silicon carbide or zirconium diboride matrix by combinations of powder, polymer and vapor infiltration. The resultant structures were analyzed to identify chemical/phase composition, microstructure and materials properties. |