Initiation of mode I degradation in sodium-beta alumina electrolytes
Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Feldman, L. A. [verfasserIn] |
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| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
1982 |
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| Schlagwörter: |
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| Anmerkung: |
© Chapman and Hall Ltd 1982 |
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| Übergeordnetes Werk: |
Enthalten in: Journal of materials science - Kluwer Academic Publishers, 1966, 17(1982), 2 vom: Feb., Seite 517-524 |
|---|---|
| Übergeordnetes Werk: |
volume:17 ; year:1982 ; number:2 ; month:02 ; pages:517-524 |
| Links: |
|---|
| DOI / URN: |
10.1007/BF00591486 |
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| Katalog-ID: |
OLC2046117972 |
|---|
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| 520 | |a Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. | ||
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10.1007/BF00591486 doi (DE-627)OLC2046117972 (DE-He213)BF00591486-p DE-627 ger DE-627 rakwb eng 670 VZ Feldman, L. A. verfasserin aut Initiation of mode I degradation in sodium-beta alumina electrolytes 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd 1982 Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface De Jonghe, Lutgard C. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 17(1982), 2 vom: Feb., Seite 517-524 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:17 year:1982 number:2 month:02 pages:517-524 https://doi.org/10.1007/BF00591486 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4336 GBV_ILN_4700 AR 17 1982 2 02 517-524 |
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10.1007/BF00591486 doi (DE-627)OLC2046117972 (DE-He213)BF00591486-p DE-627 ger DE-627 rakwb eng 670 VZ Feldman, L. A. verfasserin aut Initiation of mode I degradation in sodium-beta alumina electrolytes 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd 1982 Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface De Jonghe, Lutgard C. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 17(1982), 2 vom: Feb., Seite 517-524 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:17 year:1982 number:2 month:02 pages:517-524 https://doi.org/10.1007/BF00591486 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4336 GBV_ILN_4700 AR 17 1982 2 02 517-524 |
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10.1007/BF00591486 doi (DE-627)OLC2046117972 (DE-He213)BF00591486-p DE-627 ger DE-627 rakwb eng 670 VZ Feldman, L. A. verfasserin aut Initiation of mode I degradation in sodium-beta alumina electrolytes 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd 1982 Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface De Jonghe, Lutgard C. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 17(1982), 2 vom: Feb., Seite 517-524 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:17 year:1982 number:2 month:02 pages:517-524 https://doi.org/10.1007/BF00591486 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4336 GBV_ILN_4700 AR 17 1982 2 02 517-524 |
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10.1007/BF00591486 doi (DE-627)OLC2046117972 (DE-He213)BF00591486-p DE-627 ger DE-627 rakwb eng 670 VZ Feldman, L. A. verfasserin aut Initiation of mode I degradation in sodium-beta alumina electrolytes 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd 1982 Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface De Jonghe, Lutgard C. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 17(1982), 2 vom: Feb., Seite 517-524 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:17 year:1982 number:2 month:02 pages:517-524 https://doi.org/10.1007/BF00591486 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4336 GBV_ILN_4700 AR 17 1982 2 02 517-524 |
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10.1007/BF00591486 doi (DE-627)OLC2046117972 (DE-He213)BF00591486-p DE-627 ger DE-627 rakwb eng 670 VZ Feldman, L. A. verfasserin aut Initiation of mode I degradation in sodium-beta alumina electrolytes 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Chapman and Hall Ltd 1982 Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface De Jonghe, Lutgard C. aut Enthalten in Journal of materials science Kluwer Academic Publishers, 1966 17(1982), 2 vom: Feb., Seite 517-524 (DE-627)129546372 (DE-600)218324-9 (DE-576)014996774 0022-2461 nnns volume:17 year:1982 number:2 month:02 pages:517-524 https://doi.org/10.1007/BF00591486 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC GBV_ILN_11 GBV_ILN_20 GBV_ILN_23 GBV_ILN_30 GBV_ILN_31 GBV_ILN_32 GBV_ILN_62 GBV_ILN_65 GBV_ILN_70 GBV_ILN_2004 GBV_ILN_2006 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2057 GBV_ILN_2333 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4319 GBV_ILN_4323 GBV_ILN_4336 GBV_ILN_4700 AR 17 1982 2 02 517-524 |
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670 VZ Initiation of mode I degradation in sodium-beta alumina electrolytes Surface Crack Ionic Current High Current Density Critical Current Density Initial Surface |
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Initiation of mode I degradation in sodium-beta alumina electrolytes |
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Initiation of mode I degradation in sodium-beta alumina electrolytes |
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Feldman, L. A. |
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Journal of materials science |
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Journal of materials science |
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1982 |
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Feldman, L. A. De Jonghe, Lutgard C. |
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670 VZ |
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Aufsätze |
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Feldman, L. A. |
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10.1007/BF00591486 |
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670 |
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initiation of mode i degradation in sodium-beta alumina electrolytes |
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Initiation of mode I degradation in sodium-beta alumina electrolytes |
| abstract |
Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. © Chapman and Hall Ltd 1982 |
| abstractGer |
Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. © Chapman and Hall Ltd 1982 |
| abstract_unstemmed |
Abstract The extension of initial surface cracks by the focusing of the ionic current in beta alumina electrolytes (Mode I degradation) is discussed in terms of existing models. Focusing for an ion current impinging on an elliptic-cylindrical flaw is calculated by solving for the electric potential with suitable boundary conditions. The current density distribution along the crack is used to calculate the sodium flow velocity and Poiseuille pressure inside the flaw. Calculated critical current densities using aKlc criterion are several orders of magnitude higher than measured average critical current densities. This implies a lower effectiveKlc for electrolytic degradation than for mechanical testing. Current density enhancement around insulating barriers, such as non-wetted surface areas, is also calculated using elliptic-cylindrical coordinates. Significant current density enhancements are found, but they are localized in very small regions. Crack growth would occur within these regions, but should be arrested once the flaw extends past the high current density zone. A plausible mechanism for decreasingKlc in the electrolytic case is discussed. © Chapman and Hall Ltd 1982 |
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Initiation of mode I degradation in sodium-beta alumina electrolytes |
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