Published January 2015 | Version v1
Journal article Metadata-only

Palladium and ruthenium supported silver migration in 3C–silicon carbide

Creators

  • 1. Center for High Resolution Electron Microscopy, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031 (South Africa)
  • 2. Center for High Resolution Electron Microscopy, Nelson Mandela Metropolitan University, Port Elizabeth (South Africa)

Description

Surrogate TRISO particles were infiltrated with a Pd Ag mixture and heat treated at 1000 °C to investigate the effect of Pd on Ag transport through current state of the art TRISO coatings for use in HTGRs. The experiment was repeated with Ru instead of Pd because of the similarities in the reaction between Pd and Ru with SiC. It was found that both Pd and Ru form their respective silicides after heat treatment together with the simultaneous precipitation of graphite. In both cases Ag was concentrated along the leading edge of the reaction zone which itself was concentrated along grain boundaries. However, the effect of Pd was much more pronounced than that of Ru making Ru at most a secondary contributor to Ag migration through SiC in TRISO fuel

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jnucmat.2014.10.017

Additional details

Identifiers

DOI
10.1016/j.jnucmat.2014.10.017;
PII
S0022-3115(14)00701-6;

Publishing Information

Journal Title
Journal of Nuclear Materials
Journal Volume
456
Journal Page Range
p. 436-441
ISSN
0022-3115
CODEN
JNUMAM

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46113201
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
AFTER-HEAT; GRAPHITE; MIGRATION; MIXTURES; PALLADIUM; PARTICLES; RUTHENIUM; SILICIDES; SILICON CARBIDES; SILVER
Descriptors DEC
CARBIDES; CARBON; CARBON COMPOUNDS; DISPERSIONS; ELEMENTS; METALS; MINERALS; NONMETALS; PLATINUM METALS; REFRACTORY METALS; SILICON COMPOUNDS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.