29.02.2020 •

Stereolithography of SiOC Polymer‐Derived Ceramics Filled with SiC Micronwhiskers

Due to complicated manufacturing methods and lack of machinability, the use of engineering ceramics is limited by the manufacturing processes used to fabricate parts with intricate geometries. The 3D printing of polymers that can be pyrolyzed into functional ceramics has recently been used to significantly expand the range of geometries that can be manufactured, but large shrinkage during pyrolysis has the potential to lead to cracking. In this work, a method to additively manufacture particle‐reinforced ceramic matrix composites is described. Specifically, stereolithography is used to crosslink a resin comprised of acrylate and vinyl‐functionalized siloxane oligomers with dispersed SiC whiskers. Printed ceramic porous structures, gears, and components for turbine blades are demonstrated. [...]

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