TY - JOUR
T1 - 155/157Gd areal density
T2 - A model for design and fabrication of Gd2O3/316L novel neutron shielding composites
AU - Wan, Shipeng
AU - Wang, Wenxian
AU - Chen, Hongsheng
AU - Zhou, Jun
AU - Zhang, Yuyang
AU - Liu, Ruifeng
AU - Feng, Ruyi
N1 - Funding Information:
Thanks for “ National Natural Science Foundation of China ” (Grant No. 51775366 , 51805358 ).
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/6
Y1 - 2020/6
N2 - The Monte Carlo N-Particle Code were used to design a novel Gd2O3/316L stainless steel neutron shielding composites (Gd2O3/316L NSCs). And the constitutive equation between the 155/157Gd areal density and the neutron shielding rate was established by MCNP. When the areal density of 155/157Gd is larger than 0.01 g/cm2, the thermal neutron shielding rate of the composites reaches 99%. The NSCs with three weight fractions (1.5 wt%, 2.5 wt%, and 4.5 wt% Gd2O3) were successfully fabricated by spark plasma sintering. And Gd2O3 particles evenly distributed in 316L matrix. The main phases of the composite are austenite (γ-Fe) and Gd2O3, and in addition Fe2Gd and Gd2Ni17 are present at the interface of Gd2O3 and 316L matrix particles. The debonding of the Gd2O3 particles is the main cause of material fracture.
AB - The Monte Carlo N-Particle Code were used to design a novel Gd2O3/316L stainless steel neutron shielding composites (Gd2O3/316L NSCs). And the constitutive equation between the 155/157Gd areal density and the neutron shielding rate was established by MCNP. When the areal density of 155/157Gd is larger than 0.01 g/cm2, the thermal neutron shielding rate of the composites reaches 99%. The NSCs with three weight fractions (1.5 wt%, 2.5 wt%, and 4.5 wt% Gd2O3) were successfully fabricated by spark plasma sintering. And Gd2O3 particles evenly distributed in 316L matrix. The main phases of the composite are austenite (γ-Fe) and Gd2O3, and in addition Fe2Gd and Gd2Ni17 are present at the interface of Gd2O3 and 316L matrix particles. The debonding of the Gd2O3 particles is the main cause of material fracture.
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U2 - 10.1016/j.vacuum.2020.109304
DO - 10.1016/j.vacuum.2020.109304
M3 - Article
AN - SCOPUS:85081124109
VL - 176
JO - Vacuum
JF - Vacuum
SN - 0042-207X
M1 - 109304
ER -