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The electrical properties of ruthenium-aluminium alloys
The electrical properties of platinum, gold-palladium and a selection of alloys from the ruthenium-aluminium system have been studied at high temperatures (up to 1000°C). The majority of the ruthenium-aluminium alloy compositions studied lie near or in the ruthenium aluminide phase field. Ruthenium...
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| Format: | Thesis |
| Language: | English |
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Centre for Materials Engineering
2016
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| _version_ | 1867613205267742720 |
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| access_status_str | Open Access |
| author | Smith, Ernest Gregory |
| author2 | Lang, Candace |
| author_browse | Lang, Candace Smith, Ernest Gregory |
| author_facet | Lang, Candace Smith, Ernest Gregory |
| author_sort | Smith, Ernest Gregory |
| collection | Thesis |
| description | The electrical properties of platinum, gold-palladium and a selection of alloys from the ruthenium-aluminium system have been studied at high temperatures (up to 1000°C). The majority of the ruthenium-aluminium alloy compositions studied lie near or in the ruthenium aluminide phase field. Ruthenium aluminide is a B2 structure intermetallic which is suited to high temperature applications because in addition to a high melting point (2060°C), oxidation resistance to 1200°C and high temperature strength, it is also relatively ductile at room temperature. The possibility of high temperature electrical applications required an investigation of the electrical properties of ruthenium-aluminium alloys as compared to platinum and gold-palladium. Two sets of apparatus, capable of measuring the resistivity and thermo-e.m.f to high temperatures, were constructed and used to obtain the first experimental results for the electrical properties of ruthenium-aluminium alloys. Chemical analysis of these alloys has been performed for the first time, and together with energy dispersive spectroscopy, has revealed a composition at which there is a resistivity minimum and a positive thermo-e.m.f maximum, which appears to be associated with the formation of the ordered ruthenium aluminide phase. The resistivity and the temperature dependence of resistivity of some ruthenium-aluminium alloys are similar to that of platinum, the least resistive of the three materials investigated. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/18217 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:26.116Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Centre for Materials Engineering |
| publisherStr | Centre for Materials Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/18217 The electrical properties of ruthenium-aluminium alloys Smith, Ernest Gregory Lang, Candace Materials Engineering Applied Science The electrical properties of platinum, gold-palladium and a selection of alloys from the ruthenium-aluminium system have been studied at high temperatures (up to 1000°C). The majority of the ruthenium-aluminium alloy compositions studied lie near or in the ruthenium aluminide phase field. Ruthenium aluminide is a B2 structure intermetallic which is suited to high temperature applications because in addition to a high melting point (2060°C), oxidation resistance to 1200°C and high temperature strength, it is also relatively ductile at room temperature. The possibility of high temperature electrical applications required an investigation of the electrical properties of ruthenium-aluminium alloys as compared to platinum and gold-palladium. Two sets of apparatus, capable of measuring the resistivity and thermo-e.m.f to high temperatures, were constructed and used to obtain the first experimental results for the electrical properties of ruthenium-aluminium alloys. Chemical analysis of these alloys has been performed for the first time, and together with energy dispersive spectroscopy, has revealed a composition at which there is a resistivity minimum and a positive thermo-e.m.f maximum, which appears to be associated with the formation of the ordered ruthenium aluminide phase. The resistivity and the temperature dependence of resistivity of some ruthenium-aluminium alloys are similar to that of platinum, the least resistive of the three materials investigated. 2016-03-28T14:21:29Z 2016-03-28T14:21:29Z 1995 Master Thesis Masters MSc http://hdl.handle.net/11427/18217 eng application/pdf Centre for Materials Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Materials Engineering Applied Science Smith, Ernest Gregory The electrical properties of ruthenium-aluminium alloys |
| thesis_degree_str | Master's |
| title | The electrical properties of ruthenium-aluminium alloys |
| title_full | The electrical properties of ruthenium-aluminium alloys |
| title_fullStr | The electrical properties of ruthenium-aluminium alloys |
| title_full_unstemmed | The electrical properties of ruthenium-aluminium alloys |
| title_short | The electrical properties of ruthenium-aluminium alloys |
| title_sort | electrical properties of ruthenium aluminium alloys |
| topic | Materials Engineering Applied Science |
| url | http://hdl.handle.net/11427/18217 |
| work_keys_str_mv | AT smithernestgregory theelectricalpropertiesofrutheniumaluminiumalloys AT smithernestgregory electricalpropertiesofrutheniumaluminiumalloys |