Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates
The fracture toughness of ceramic substrates made of alumina, ZTA and silicon nitride was determined using the single edge V-notched plate method. In order to make a statement about the measurement precision, not only 5, as required by the standard, but 30 specimens per material type were tested. In...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Open Ceramics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666539524000038 |
| _version_ | 1797249068129320960 |
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| author | Hannes Kühl Achim Rübling Daniel Schnee |
| author_facet | Hannes Kühl Achim Rübling Daniel Schnee |
| author_sort | Hannes Kühl |
| collection | DOAJ |
| description | The fracture toughness of ceramic substrates made of alumina, ZTA and silicon nitride was determined using the single edge V-notched plate method. In order to make a statement about the measurement precision, not only 5, as required by the standard, but 30 specimens per material type were tested. In addition, a much more practical and less error-prone holding and testing device for the ceramic plates was used, which is presented in the paper. For all materials, including the comparatively fine-grained ZTA, the material-typical KIc values could be determined. However, the range of variation of the measured values is comparatively high with coefficients of variance up to 7.8 %. It is shown that a standard-compliant test on Al2O3 substrates can exhibit a fluctuation range of 0.5 MPa m0.5 without the material showing any differences. It is important to be aware of this when using the method. Especially for quality assurance, where deviations in the range of a few tenths of MPa∙m0.5 are considered problematic, the method should therefore be regarded as critical. An increase in the number of specimens should be considered, as well as the inclusion of a statement on the precision of the measurement method in the standard. |
| first_indexed | 2024-03-08T14:49:45Z |
| format | Article |
| id | doaj.art-35e60a8c6eee411abe82322af9831200 |
| institution | Directory Open Access Journal |
| issn | 2666-5395 |
| language | English |
| last_indexed | 2024-04-24T20:24:36Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Open Ceramics |
| spelling | doaj.art-35e60a8c6eee411abe82322af98312002024-03-22T05:40:55ZengElsevierOpen Ceramics2666-53952024-03-0117100539Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin platesHannes Kühl0Achim Rübling1Daniel Schnee2Technische Hochschule Nürnberg Georg Simon Ohm, Nürnberg, Germany; Corresponding author. Technische Hochschule Nürnberg Georg Simon Ohm, Fakultät Werkstofftechnik, Nürnberg, Germany.Technische Hochschule Nürnberg Georg Simon Ohm, Nürnberg, GermanyHeraeus Deutschland GmbH & Co. KG, Hanau, GermanyThe fracture toughness of ceramic substrates made of alumina, ZTA and silicon nitride was determined using the single edge V-notched plate method. In order to make a statement about the measurement precision, not only 5, as required by the standard, but 30 specimens per material type were tested. In addition, a much more practical and less error-prone holding and testing device for the ceramic plates was used, which is presented in the paper. For all materials, including the comparatively fine-grained ZTA, the material-typical KIc values could be determined. However, the range of variation of the measured values is comparatively high with coefficients of variance up to 7.8 %. It is shown that a standard-compliant test on Al2O3 substrates can exhibit a fluctuation range of 0.5 MPa m0.5 without the material showing any differences. It is important to be aware of this when using the method. Especially for quality assurance, where deviations in the range of a few tenths of MPa∙m0.5 are considered problematic, the method should therefore be regarded as critical. An increase in the number of specimens should be considered, as well as the inclusion of a statement on the precision of the measurement method in the standard.http://www.sciencedirect.com/science/article/pii/S2666539524000038Fracture toughnessCeramic substratesCeramic thin platesSEVNP method |
| spellingShingle | Hannes Kühl Achim Rübling Daniel Schnee Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates Open Ceramics Fracture toughness Ceramic substrates Ceramic thin plates SEVNP method |
| title | Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates |
| title_full | Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates |
| title_fullStr | Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates |
| title_full_unstemmed | Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates |
| title_short | Critical evaluation of SEVNP-method to measure fracture toughness of ceramic thin plates |
| title_sort | critical evaluation of sevnp method to measure fracture toughness of ceramic thin plates |
| topic | Fracture toughness Ceramic substrates Ceramic thin plates SEVNP method |
| url | http://www.sciencedirect.com/science/article/pii/S2666539524000038 |
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