Changes in young's modulus and electrical conductivity of nuclear grade graphites oxidized with air

Microstructural modelling of nuclear graphite using multi-phase models

“…Experimental results for the effects of thermal oxidation reported by Imai et al [21] show a smooth decreasing trend, and are in good agreement with those obtained by Pickup et al [20]. As described in the Appendix, Young's modulus is related to the pore fraction contained in the material or model by Knudsen's semi-empirical equation [24,25]: where E 0 is the virtually 'pore-free' Young's modulus and b P is the decay factor (see Appendix).…”

“…11 shows the numerical results obtained using both the new multi-phase and the earlier two-phase finite element models [13]. Experimental data for thermally oxidised quasi-isotropic nuclear grades IM1-24 [20] and IG-110 [21] are also shown in Fig. 11 as a comparison.…”

“…11. Young's modulus changes with increasing pore volume fractions calculated using two-phase models [8], multi-phase models and comparison with experimental data obtained from IM1-24 grade [20] and IG-110 grade [21].…”

Multifractal-based assessment of Gilsocarbon graphite microstructures

“…Oxidation changes the graphite's porous microstructure, and increased porosity can lead to a significant decrease in its mechanical properties of elastic modulus and strength [17][18][19].…”