- low porosity ceramics
- additive manufacturing and 3D printing
There is a need for reducing the cost and increasing the throughput for additive manufacturing (AM) of ceramics and ceramic matrix composites (CMCs). The problem is primarily caused by harsh and extended high temperature consolidation process. Also, AM of ceramic parts with low density is demanding.
The invention discloses a new method for 3D printing of reactive inks through extrusion. The printing system and ink compositions are designed for low cost, easy processing, and improved part density, which are challenges of ceramic additive manufacturing. The printing process is achieved by computer-controlled extrusion and on-site reactive consolidation of powder/ preceramic polymer binder mixture. The mixture, upon deposition on printing substrate, undergoes self-propagating reaction by heating on one end of printed ink. The highly heat-releasing reaction of reactive powder decomposes preceramic binders and consolidates products simultaneously. When incorporating continuous reinforcement, CMCs can also be additively manufactured.
Name: Shyamala Rajagopalan