b'Direct Integrated AdvancedA binder-free slurry of ceramic nuclear fuel surrogate formed free-standing Manufacturing of Multi- shapes, advancing additive manufacturing of reactor materials.component Solid Fuel SystemsT his project developed a sol-gel-like additive manufacturing process for high temperature fuel and cladding applications through collaboration with Embedded Sensorsbetween INL and The Ohio State University Center for Design and Manufacturing Excellence. Extrusion of slurry via syringe followed by drying and sintering allowed for direct printing of ceramic materials. Cerium dioxide, a surrogate for nuclear fuel and a focus of this work, was incorporated in a binder-free slurry, leaving printed parts without polymer or other residual additives. The developed slurry was extruded to build free-standing cylinders of 20 layers and 9 mm height. PROJECT NUMBER: The cylinders were subsequently dried in ambient air and sintered at 1500C for one20A44-131 hour. Titanium dioxide slurries were also printed because the material is applicable in gas sensing. Furthermore, cerium dioxide was printed within a silicon carbide TOTAL APPROVED AMOUNT:bath, thus incorporating the fuel surrogate in a cladding material and approaching $774,500 over 3 years multi-material printing. In future work, printing in a bath could support uncured or PRINCIPAL INVESTIGATOR:low modulus gels that cannot stand freely or otherwise require a support bath, thus Elizabeth Zell improving the applicability of additive manufacturing to ceramic fuels, claddings, and other materials and multi-material systems. There is also future potential to CO-INVESTIGATORS: include embedded sensor technologies and new fuel-gap fabrication technologies.Isabella Van Rooyen, INLSudipta Biswas, INL TALENT PIPELINE:Edward Herderick, The Ohio State University Elizabeth Zell, postdoc at INL Jakub Toman, postdoc at INLPRESENTATIONSZell, E., E. D. Herderick, I. V. Rooyen, A Review of Solution Based Processing Routes for Advanced Nuclear Fuel, The Minerals, Metals and Materials Society 2021Mar. 1518, 2021.Layer-by-layer extrusion three-dimensional printing of nuclear fuel surrogate ceramic and views of final, sintered product.79'