Yıldırım, Aydın2026-07-272026-07-272026-05-27https://kurumsalarsiv.tenmak.gov.tr/handle/20.500.12878/2102This study numerically evaluates the radiation shielding performance of a multilayer ceramic architecture consisting of a zirconia toughened alumina core with mycelium-based coatings, including melanized variants, under gamma rays, neutrons, and protons. Photon attenuation is simulated using Geant4 and benchmarked against XCOM, and standard gamma shielding metrics are reported for the multilayer configuration. Neutron response is quantified through macroscopic removal cross sections in the 2 to 10 MeV range and thick-ness dependent transmission factors for fast and thermal neutrons, where clearer separation among coatingoptionsisobservedinthethermalregion.ProtonstoppingpoweranddepthdependentLETprofilesareobtainedwithSRIM/TRIMfor10to50MeV,andtheBraggpeakpositionisusedtoassesslayerthicknessrequirements.Thecompositesystemshowsphotonattenuationbetweenconcreteandlead,whileneutronperformancedependsstronglyoncoatingcomposition.Overall,theresultsestablishadirectlinkbetweenarchi-tecturalparametersandradiationresponse,providingguidanceforthedesignandoptimizationoflayeredceramicshieldingsystemseninfo:eu-repo/semantics/openAccessSpace radiationRadiation shieldingMultilayer compositeZirconia toughenedaluminaNeutronattenuationarticle301630377810.1016/j.asr.2026.05.076