Effect of neutron irradiation on the microstructure of tungsten
Two grades of pure tungsten, single and polycrystalline, were irradiated for 282 days in the HFR reactor, Petten, at 900 °C to an average damage level of 1.6dpa. Each grade of tungsten was investigated using the transmission electron microscope (TEM) to assess the effect of neutron irradiation on tu...
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| Format: | Article |
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Elsevier
2016-12-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179115300867 |
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| author | M. Klimenkov U. Jäntsch M. Rieth H.C. Schneider D.E.J. Armstrong J. Gibson S.G. Roberts |
| author_facet | M. Klimenkov U. Jäntsch M. Rieth H.C. Schneider D.E.J. Armstrong J. Gibson S.G. Roberts |
| author_sort | M. Klimenkov |
| collection | DOAJ |
| description | Two grades of pure tungsten, single and polycrystalline, were irradiated for 282 days in the HFR reactor, Petten, at 900 °C to an average damage level of 1.6dpa. Each grade of tungsten was investigated using the transmission electron microscope (TEM) to assess the effect of neutron irradiation on tungsten microstructure. Investigations revealed the formation of faceted cavities, whose diameter varies from 4 to 14nm in both materials. The cavities are homogeneously distributed only inside single crystalline tungsten. The local distribution of cavities in polycrystalline tungsten is strongly influenced by grain boundaries. The number densities of cavities were measured to be 4×1021 m−3 for polycrystalline and 2.5×1021 m−3 for single crystalline tungsten. This corresponds to volumetric densities of 0.45% and 0.33% respectively. High-resolution transmission electron microscopy (HRTEM) revealed that faces of cavities are oriented in (110) plane. Analytical investigations showed precipitation of rhenium and osmium produced by a transmutation reaction around cavities and at grain boundaries. |
| first_indexed | 2024-04-14T03:06:07Z |
| format | Article |
| id | doaj.art-55220a788be54d2b99fa598395e79859 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-04-14T03:06:07Z |
| publishDate | 2016-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-55220a788be54d2b99fa598395e798592022-12-22T02:15:43ZengElsevierNuclear Materials and Energy2352-17912016-12-019C48048310.1016/j.nme.2016.09.010Effect of neutron irradiation on the microstructure of tungstenM. Klimenkov0U. Jäntsch1M. Rieth2H.C. Schneider3D.E.J. Armstrong4J. Gibson5S.G. Roberts6Karlsruhe Institute of Technology (KIT), Institute for Applied Materials, 76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), Institute for Applied Materials, 76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), Institute for Applied Materials, 76021 Karlsruhe, GermanyKarlsruhe Institute of Technology (KIT), Institute for Applied Materials, 76021 Karlsruhe, GermanyUniversity of Oxford, Department of Materials, Oxford, UKUniversity of Oxford, Department of Materials, Oxford, UKUniversity of Oxford, Department of Materials, Oxford, UKTwo grades of pure tungsten, single and polycrystalline, were irradiated for 282 days in the HFR reactor, Petten, at 900 °C to an average damage level of 1.6dpa. Each grade of tungsten was investigated using the transmission electron microscope (TEM) to assess the effect of neutron irradiation on tungsten microstructure. Investigations revealed the formation of faceted cavities, whose diameter varies from 4 to 14nm in both materials. The cavities are homogeneously distributed only inside single crystalline tungsten. The local distribution of cavities in polycrystalline tungsten is strongly influenced by grain boundaries. The number densities of cavities were measured to be 4×1021 m−3 for polycrystalline and 2.5×1021 m−3 for single crystalline tungsten. This corresponds to volumetric densities of 0.45% and 0.33% respectively. High-resolution transmission electron microscopy (HRTEM) revealed that faces of cavities are oriented in (110) plane. Analytical investigations showed precipitation of rhenium and osmium produced by a transmutation reaction around cavities and at grain boundaries.http://www.sciencedirect.com/science/article/pii/S2352179115300867TungstenNeutron irradiationMicrostructureTransmutation |
| spellingShingle | M. Klimenkov U. Jäntsch M. Rieth H.C. Schneider D.E.J. Armstrong J. Gibson S.G. Roberts Effect of neutron irradiation on the microstructure of tungsten Nuclear Materials and Energy Tungsten Neutron irradiation Microstructure Transmutation |
| title | Effect of neutron irradiation on the microstructure of tungsten |
| title_full | Effect of neutron irradiation on the microstructure of tungsten |
| title_fullStr | Effect of neutron irradiation on the microstructure of tungsten |
| title_full_unstemmed | Effect of neutron irradiation on the microstructure of tungsten |
| title_short | Effect of neutron irradiation on the microstructure of tungsten |
| title_sort | effect of neutron irradiation on the microstructure of tungsten |
| topic | Tungsten Neutron irradiation Microstructure Transmutation |
| url | http://www.sciencedirect.com/science/article/pii/S2352179115300867 |
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