Imperial College London
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Dr Sam Humphry-Baker

Faculty of Engineering, Department of Materials

Lecturer in Ceramics
 
 
 
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Contact

 

s.humphry-baker

 
 
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Location

 

LM.04DRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Humphry-Baker:2023:10.1016/j.nme.2022.101349,
author = {Humphry-Baker, S and Aihemaiti, O and Ivanov, E and del, Rio E and Windsor, C and Astbury, J},
doi = {10.1016/j.nme.2022.101349},
journal = {Nuclear Materials and Energy},
pages = {1--10},
title = {Optimisation of W2B-W composites for radiation attenuation and thermal-mechanical performance},
url = {http://dx.doi.org/10.1016/j.nme.2022.101349},
volume = {34},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The neutronics and engineering properties of a composite radiation shielding material, W2B-W, are systematically investigated. Neutronics calculations using the MCNP code indicate that each additional 1 % volume fraction W2B reduces the neutron energy flux into the superconducting core by 0.4–0.9 %, and reduces the gamma flux by 1.0–2.2 %, depending on the shield thickness. Materials with W2B volume fractions of 43 and 89 % are fabricated by vacuum hot-pressing, resulting in a microstructure in which the dominant interpenetrating phase was W and W2B respectively. For the W2B-dominant material the thermophysical and mechanical properties were inferior. For example, room temperature flexural strength, fracture toughness, and thermal conductivity were all lower (by ∼25%, 30% and 40% respectively). Also, the brittle to ductile transition temperature was ∼500 °C higher. The results indicate that when considering boride content there is an important trade-off between shielding performance and thermal stress resistance.
AU  - Humphry-Baker,S
AU  - Aihemaiti,O
AU  - Ivanov,E
AU  - del,Rio E
AU  - Windsor,C
AU  - Astbury,J
DO  - 10.1016/j.nme.2022.101349
EP  - 10
PY  - 2023///
SN  - 2352-1791
SP  - 1
TI  - Optimisation of W2B-W composites for radiation attenuation and thermal-mechanical performance
T2  - Nuclear Materials and Energy
UR  - http://dx.doi.org/10.1016/j.nme.2022.101349
UR  - https://www.sciencedirect.com/science/article/pii/S2352179122002307?via%3Dihub
UR  - http://hdl.handle.net/10044/1/101366
VL  - 34
ER  -
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