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Cahill, James T.

Chandrasekaran, Swetha

Frane, Wyatt Du

Kuntz, Joshua

Wat, Amy

Worsley, Marcus A.

Yang, Qi Rong

English

Engineering Conferences International

DIRECT INK WRITING OF ULTRA HIGH TEMPERATURE CERAMICS  Swetha Chandrasekaran, Materials Science Division, Lawrence Livermore National Laboratory, USA   Chandrasekar2@llnl.gov Amy Wat, Materials Science Division, Lawrence Livermore National Laboratory, USA   Qi Rong Yang, Materials Science Division, Lawrence Livermore National Laboratory, USA    James T. Cahill, Materials Science Division, Lawrence Livermore National Laboratory, USA   Wyatt Du Frane, Materials Science Division, Lawrence Livermore National Laboratory, USA   Marcus A. Worsley, Materials Science Division, Lawrence Livermore National Laboratory, USA   Joshua Kuntz. Materials Science Division, Lawrence Livermore National Laboratory, USA     Additive manufacturing (AM) of engineering materials that are lightweight and durable with excellent chemical and wear resistance continues to be an area of intense interest and study. Fabrication of ultra-high temperature ceramics such as boron carbide (B4C), zirconium diboride (ZrB2), hafnium carbide (HfC), Hafnium diboride (HfB2), zirconium carbide (ZrC) and silicon carbide (SiC) parts through direct ink writing at room temperature has been demonstrated. The 3D printed were made from aqueous, thixotropic ink consisting of the above-mentioned particles with a solid loading ranging from 50.0 to 59.3 vol.%.  The complex green bodies (B4C) are infiltrated with an aluminum matrix to obtain B4C-Al Cermets. This work describes the process of fabricating such high temperature ceramics-based aerogels through direct ink writing (DIW) technique. 3D printing these ceramic materials could be used to optimize and design the lightweight armor materials or materials used for extreme applications. Complex shaped parts and parts with graded density can be easily fabricated through the DIW technique for molten metal infiltration to create Cermets which are used for ballistic testing devices.  Funding was provided by Lawrence Livermore National Laboratory Directed Research and Development Grant 19-DR-002. This work was performed under the auspices of the U.S. Department of Energy by LLNL under contract DE-AC52-07NA27344.   Figure 1: Boron carbide/carbon green body printed through direct ink writing. 

Direct ink writing of ultra-high temperature ceramics

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1030&context=uhtc_v&type=additional

Direct ink writing of ultra-high temperature ceramics

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Engineering Conferences International