In this study, Phy-X/PSD software was utilized for searching the neutron shielding and gamma-ray shielding features of the high-speed steel composites. The effects of the Al2O3 and SiO2 contents on the irradiation properties of the T15 (0.4Si, 0.4Mn, 0.5Mo, 1.5C, 4.5Cr, 4.75Co, 5.0V, 12.5W)+(0-30%) composite material were examined. The properties of the linear attenuation coefficients (LAC), half-value layer (HVL), fast neutron removal cross-sections (FNRC), mean free path (MFP), effective conductivity (Ceff
), mass attenuation coefficient (MAC), exposure buildup factors (EBF), tenth-value layer (TVL), effective atomic number (Zeff
) were determined for the energy varying between 0.015 MeV and 15 MeV. The investigation revealed that the MAC and LAC values in the T15 composite material declined with the increase in the SiO2 or Al2O3 contents in the composite. On the other hand, the Geometric Progression (G-P) method was utilized to determine the EBFs under the penetration depth of up to 40 mfp and the same energy range. According to the results of the G-P method, the values of HVL varied from 0.01 to0.034 cm, TVL values varied from 0.01 to 0.112 cm, while FNRC values varied from 6.584cm-1 to 8.27 cm-1, and Ceff
values varied from 1.36 x1011S/m to 3.12x1011 S/m. The results revealed that the T15 high-speed steel composite provided the maximum photon shielding capacity because it showed the lowest HVL value while showing the highest Zeff
, and MAC values. The T15 + 20% Al2O3 composite material had the highest FNRC due to its higher density. The present investigation can be considered original in terms of a few aspects. Consequently, these new shielding materials can be chosen as shielding materials against gamma radiation. In addition to contributing to several popular technologies including space technologies and nanotechnology, the present study can also contribute to nuclear technology.
In this study, composite samples of WE43 (Mg-4Y-3RE-Zr) reinforced with nano-B4C particles in different ratios (0.5 and 2 wt.%) were prepared by spark plasma sintering (SPS). The powders were mixed in a 3-dimensional ball mill at 300 rpm. The mixed powders were then hot pressed under 35 MPa pressure at 525 °C for 6 min. XRD and FESEM-EDS instruments were used to characterize the composite samples. Microhardness and wear tests were performed to designate the mechanical properties. It was found that the highest hardness occurred in the composite sample with 2% nano-B4C composites. It was also found that tribological properties improved with the increase of nano-B4C content.
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