The mechanical properties of tungsten grown by chemical vapour deposition
The mechanical properties of polycrystalline tungsten grown by chemical vapour deposition (CVD) have been investigated. Fracture tests were performed on the material over the 24-967 °C temperature range at a low strain rate. The material was found to be brittle or semi-brittle across the entire temp...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
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Elsevier
2009
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| Subjects: |
| _version_ | 1826295173619908608 |
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| author | Murphy, J Giannattasio, A Yao, Z Hetherington, C Nellist, P Roberts, S |
| author_facet | Murphy, J Giannattasio, A Yao, Z Hetherington, C Nellist, P Roberts, S |
| author_sort | Murphy, J |
| collection | OXFORD |
| description | The mechanical properties of polycrystalline tungsten grown by chemical vapour deposition (CVD) have been investigated. Fracture tests were performed on the material over the 24-967 °C temperature range at a low strain rate. The material was found to be brittle or semi-brittle across the entire temperature range investigated. This behaviour differs significantly from that previously found in conventionally-grown polycrystalline tungsten, which, under similar experimental conditions, is found to be ductile above approximately 120 °C. Energy dispersive X-ray analysis indicates that in the CVD tungsten, there is a significant concentration of fluorine at grain boundaries. It is therefore suggested that fluorine segregation to grain boundaries is responsible for the increased brittleness observed in the CVD tungsten. |
| first_indexed | 2024-03-07T03:56:58Z |
| format | Journal article |
| id | oxford-uuid:c334ba32-ea2d-425e-a72d-9d6fa4c71917 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:56:58Z |
| publishDate | 2009 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:c334ba32-ea2d-425e-a72d-9d6fa4c719172022-03-27T06:14:44ZThe mechanical properties of tungsten grown by chemical vapour depositionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c334ba32-ea2d-425e-a72d-9d6fa4c71917Materials SciencesEnglishOxford University Research Archive - ValetElsevier2009Murphy, JGiannattasio, AYao, ZHetherington, CNellist, PRoberts, SThe mechanical properties of polycrystalline tungsten grown by chemical vapour deposition (CVD) have been investigated. Fracture tests were performed on the material over the 24-967 °C temperature range at a low strain rate. The material was found to be brittle or semi-brittle across the entire temperature range investigated. This behaviour differs significantly from that previously found in conventionally-grown polycrystalline tungsten, which, under similar experimental conditions, is found to be ductile above approximately 120 °C. Energy dispersive X-ray analysis indicates that in the CVD tungsten, there is a significant concentration of fluorine at grain boundaries. It is therefore suggested that fluorine segregation to grain boundaries is responsible for the increased brittleness observed in the CVD tungsten. |
| spellingShingle | Materials Sciences Murphy, J Giannattasio, A Yao, Z Hetherington, C Nellist, P Roberts, S The mechanical properties of tungsten grown by chemical vapour deposition |
| title | The mechanical properties of tungsten grown by chemical vapour deposition |
| title_full | The mechanical properties of tungsten grown by chemical vapour deposition |
| title_fullStr | The mechanical properties of tungsten grown by chemical vapour deposition |
| title_full_unstemmed | The mechanical properties of tungsten grown by chemical vapour deposition |
| title_short | The mechanical properties of tungsten grown by chemical vapour deposition |
| title_sort | mechanical properties of tungsten grown by chemical vapour deposition |
| topic | Materials Sciences |
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