Dual function polymer-derived non-oxide/oxide matrix prepared by additive manufacturing
November 5-9, 2017
A nanolayer-at-a-time additive manufacturing approach is employed to create a dense matrix of polymer-derived ceramics around fiber bundles of silicon carbide. Thin ultrathin films pyrolyze quickly without cracks with a cycle time of about one minute. The polymer precursor for SiCN is mixed with a precursor of hafnium oxide, which produces a matrix containing a fine dispersion of hafnium silicate. The oxide/nonoxide matrix leads to both good mechanical properties as well as remarkable oxidation resistance.
Rishi Raj, "Dual function polymer-derived non-oxide/oxide matrix prepared by additive manufacturing" in "Advanced Ceramic Matrix Composites: Science and Technology of Materials, Design, Applications, Performance and Integration", Yutaka Kagawa, Tokyo University of Technology, Japan Dongming Zhu, NASA Glenn Research Center, USA Ram Darolia, GE Aviation (retired), USA Rishi Raj, University of Colorado, Boulder, USA Eds, ECI Symposium Series, (2017). https://dc.engconfintl.org/acmc/33