About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Laser Induced One-step Patterned Synthesis of Polymer-Derived Ceramics |
| Author(s) |
Aidan Restelli, Taylor Barrett, Brigid Mullany, Haitao Zhang |
| On-Site Speaker (Planned) |
Aidan Restelli |
| Abstract Scope |
Conventional synthesis of polymer-derived ceramics (PDCs) requires a two-step process of curing and pyrolysis of preceramic polymers and needs additional photoinitiators or special photo-curable preceramic polymers to realize patterned growth. In this work, patterned growth of PDCs was realized by a one-step direct laser writing method. Effects of laser power and scanning speed have been explored to identify processing thresholds for precursor conversion, ablation onset, and feature integrity. Optical microscopy, coherence scanning interferometry, and scanning electron microscopy revealed three distinct processing regimes: under-conversion (low fluence), conformal conversion (optimal fluence), and over-conversion (high fluence). An optimal synthesis condition was identified with continuous features, while higher power densities resulted in ablation of the centerline, sputtering, and loss of local thermal control. These results establish a process window for the patterned synthesis of PDCs in a single step and pave the way to direct fabrication of PDC-based devices for high-temperature electronic applications. |