About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Reactive Binder Jet Additive Manufacturing for Microstructural Control of Ceramic Components |
Author(s) |
Daniel Oropeza, Ricardo Roberts, John Hart |
On-Site Speaker (Planned) |
Daniel Oropeza |
Abstract Scope |
Polymer binders are most commonly used in binder jet additive manufacturing (BJAM) to provide temporary strength to the printed component, enabling part removal and handling. However, it is challenging to manage distortion and shrinkage during sintering for polymer-bound parts. To address this issue, a process for the synthesis and rapid screening of custom binder inks involving exploration of binder ink rheology, thermal decomposition, and evaluation of green strength is presented. The ink development process is applied to synthesize custom polymer and reactive metal salt binder inks, showcasing the capability to control jetting behavior through rheological modifications. Using a custom-built BJAM testbed, reactive binders (which create solid interparticle bridges upon decomposition and provide additional benefit beyond temporary green strength) are implemented in BJAM. Direct deposition of a reactive binder sintering aid results in microstructural control and sustained part strength of ceramic BJAM parts. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |