Additive Manufacturing of Ceramics using Preceramic Polymers

Dr. Tobias Schaedler

HRL Laoratories

Seminar Information

Seminar Series
Mechanics & Materials

Seminar Date - Time
February 27, 2023, 11:00 am
-
12:15

Seminar Location
von Karman-Penner Seminar Room
EBU2, Room 479
IN PERSON ONLY


Abstract

This talk reviews the different approaches for the additive manufacturing of ceramics and discusses how preceramic polymers can offer new opportunities from high temperature applications to microelectronics. Siloxane and carbosilane organo-silicon polymers will convert to Si(O)C upon pyrolysis. We have developed UV curable variants for use with liquid-vat type 3D printers as well as shear-thickening variants for direct ink writing. Suspending fibers or particles in the resin before printing results in a two-phase microstructure in the pyrolyzed part. This enables additive manufacturing of SiC based ceramic matrix composites that exhibit high strength at 1600°C. Furthermore, the low viscosity of preceramic resins is advantageous for additive micro-manufacturing of parts on the centimeter scale with 10 µm sized features. We demonstrate thousands of curved holes (i.e., vias) – printed directly into the ceramic – that can be subsequently metallized to provide electric pathways. This technology enables unprecedented via routing and packaging options for the 3D integration of microelectronic subsystems

Speaker Bio

Tobias A. Schaedler is currently the manager of the Architected Materials and Adaptive Structures Department at HRL Laboratories, LLC in Malibu, California. He received his Ph.D. in Materials from the University of California, Santa Barbara in 2006 following undergraduate studies in the same field at the University of Bayreuth in Germany. After a stint at General Electric Aviation, he joined HRL in 2009 where he has held senior scientist positions and served as founding director of the Center for Additive Materials. Dr. Schaedler has authored or co-authored 39 papers and holds 43 U.S. patents. He has received the 2012 Breakthrough Innovation Award for the ultralight microlattice, the 2016 Emerging Technology Award by the RadTech Association for the first-ever UV additive manufacturing of polymer-derived ceramics, and the 2017 R&D 100 Award and 2018 Edison Award for 3D printing of ceramics. Dr. Schaedler is working on developing architected materials and additive manufacturing processes for automotive and aerospace applications. His current efforts focus on 3D printing of high temperature ceramic composites as well as multi-material additive manufacturing at the microscale to improve 3D integration of microelectronic subsystems.