AI Article Synopsis
- Nanopore pyrolytic graphite coatings (PyC) were developed to prevent liquid fluoride salt and xenon gas from penetrating graphite materials.
- Samples were irradiated with high-energy xenon ions at varying doses to assess how well the PyC coatings could resist damage from radiation.
- Results showed that while the coatings initially became smoother with increased radiation, they eventually exhibited peeling and damage at a certain dose, indicating that PyC is more sensitive to radiation than traditional IG-110 graphite.
Article Abstract
Nanopore pyrolytic graphite coatings (PyC, average pore size ∼64 nm) were prepared on graphite to inhibit liquid fluoride salt and Xe penetration. The samples were irradiated with 7 MeV Xe to a total peak dose of 0.1, 0.5, 2.5 and 5.0 displacements per atom at room temperature to study the irradiation resistance of the PyC. The effect of irradiation on the properties of the graphite was evaluated. With the increase of irradiation dose, the surface morphology of the coatings tends to be smoother. At the total peak dose of 2.5 dpa, peeling and spalling on the surface of the samples have been identified, indicating the surface microstructure of the graphite has been damaged by Xe bombardment. Raman results indicated the increase in the degree of disorder and decrease of in-plane crystallite size with the irradiation dose, and the new PyC was more sensitive to irradiation than IG-110 graphite. The nanohardness at peak dose increased with the irradiation dose, but decreased at 2.5 dpa. The results of a hardness test also show PyC has a higher irradiation sensitivity.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086727 | PMC |
| http://dx.doi.org/10.1039/c8ra06953k | DOI Listing |
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