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Preparation and characteristics of epoxy/clay/B4C nanocomposite at high concentration of boron carbide for neutron shielding application

Kiani, M. A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.radphyschem.2017.07.013
  3. Abstract:
  4. In this research, the characteristics of the prepared samples in epoxy matrix by means of X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), as well as scanning electron microscope (SEM) are evaluated. Meanwhile, the obtained mechanical properties of the specimen are investigated. Thermogravimetric analysis (TGA) is also employed to evaluate the thermal degradation of manufactured nanocomposites. The thermal neutron absorption properties of nanocomposites containing 3 wt% of montmorillonite nanoclay (closite30B) have been studied experimentally, using an Am-Be point source. Mechanical tests reveal that the higher B4C concentrations, the more tensile strengths, but lower Young's modulus in all samples under consideration. TGA analysis also shows that thermal stability of the nanocomposite, increases in presence of B4C. Finally, neutron absorption analysis shows that increasing the B4C concentration leads to a nonlinearly build-up of neutron absorption cross section. © 2017 Elsevier Ltd
  5. Keywords:
  6. Nanoclay ; Nanocomposite ; Neutron shielding ; Beryllium alloys ; Binary alloys ; Boron carbide ; Elastic moduli ; Nanocomposites ; Nanostructured materials ; Neutron absorption ; Neutrons ; Radiation shielding ; Scanning electron microscopy ; Shielding ; Tensile strength ; Thermodynamic stability ; X ray diffraction ; X ray spectroscopy ; Absorption cross sections ; Absorption property ; Closite30B ; Epoxy ; Montmorillonite nanoclay ; Nano clays ; Thermogravimetric analysis ; Epoxide ; Inorganic compound ; Unclassified drug ; Clay ; Concentration response ; Controlled study ; Degradation kinetics ; Energy dispersive X ray spectroscopy ; Mechanical stress ; Mechanics ; Neutron radiation ; Radiation absorption ; Radiation shield ; Synthesis ; Thermodynamics ; Thermogravimetry ; Thermostability ; Young modulus
  7. Source: Radiation Physics and Chemistry ; Volume 141 , 2017 , Pages 223-228 ; 0969806X (ISSN)
  8. URL: https://www.sciencedirect.com/science/article/pii/S0969806X16303632