Are Nanoporous Materials Radiation Resistant
作者： E. M. Bringa , J. D. Monk , A. Caro , A. Misra , L. Zepeda-Ruiz
DOI: 10.1021/NL201383U
关键词: Surface-area-to-volume ratio 、 Nanofoam 、 Radiation damage 、 Materials science 、 Radiation 、 Optics 、 Irradiation 、 Nanoscopic scale 、 Composite material 、 Nanoporous 、 Porosity
摘要: The key to perfect radiation endurance is recovery. Since surfaces are sinks for defects, a porous material with high surface volume ratio has the potential be extremely tolerant, provided it morphologically stable in environment. Experiments and computer simulations on nanoscale gold foams reported here show existence of window parameter space where tolerant. We analyze these results terms model irradiation response that quantitatively locates such appears consequence combined effect two length scales dependent conditions: (i) ligament diameters below minimum value display melting breaking, together compaction increasing dose (this typically ∼5 nm primary knock atoms (PKA) ∼15 keV Au), while (ii) above maximum bulk behavior, is, damage accumulation (few ...
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