Observations of crystal strains in filler and QI particles through TEM examination – Effect of processing and grain size
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In: Materials and Design, Vol. 204.2021, No. June, 109673, 06.2021.
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T1 - Observations of crystal strains in filler and QI particles through TEM examination – Effect of processing and grain size
AU - Arregui-Mena, José David
AU - Worth, Robert N.
AU - Tunes, Matheus
AU - Edmondson, Philip D.
N1 - Publisher Copyright: © 2021 The Authors
PY - 2021/6
Y1 - 2021/6
N2 - Nuclear graphite serves as a moderator and structural support in British Advanced Gas-cooled Reactors(AGRs) and is a candidate for the next generation of nuclear reactors. Graphite is comprised of three mainphases: binder, filler and porosity; which are dependent on the manufacturing process and raw materials.During the graphitisation process, graphite components are subjected to high temperatures which maylead to significant strains and also creation of cracks known as Mrozowski cracks. Transmission electronmicroscopy observations confirmed the existence of strain fields generated by Mrozowski cracks, manufacturingand neutron irradiation in multiple graphite grades. This research confirms the existence ofcrystal strains in filler particles and quinoline insoluble (QI) particles. The observations gathered in thisresearch indicate that crystal strains provide different degrees of rigidity to the filler and binder phase. Acomparison between crystal strains of QI particles and filler particles may explain the irradiationresponse of these phases.
AB - Nuclear graphite serves as a moderator and structural support in British Advanced Gas-cooled Reactors(AGRs) and is a candidate for the next generation of nuclear reactors. Graphite is comprised of three mainphases: binder, filler and porosity; which are dependent on the manufacturing process and raw materials.During the graphitisation process, graphite components are subjected to high temperatures which maylead to significant strains and also creation of cracks known as Mrozowski cracks. Transmission electronmicroscopy observations confirmed the existence of strain fields generated by Mrozowski cracks, manufacturingand neutron irradiation in multiple graphite grades. This research confirms the existence ofcrystal strains in filler particles and quinoline insoluble (QI) particles. The observations gathered in thisresearch indicate that crystal strains provide different degrees of rigidity to the filler and binder phase. Acomparison between crystal strains of QI particles and filler particles may explain the irradiationresponse of these phases.
KW - Crystal strains
KW - Irradiation effects
KW - Nuclear graphite
KW - TEM
UR - http://www.scopus.com/inward/record.url?scp=85103653961&partnerID=8YFLogxK
U2 - 10.1016/j.matdes.2021.109673
DO - 10.1016/j.matdes.2021.109673
M3 - Article
AN - SCOPUS:85103653961
VL - 204.2021
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
IS - June
M1 - 109673
ER -
