Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O
The Vickers microhardness measurements of boron suboxide (B6O) ceramics prepared by uniaxial hot-pressing was investigated at indentation test loads in the range from 0.10 to 2.0 kgf. Results from the investigation indicate that the measured microhardness exhibits an indentation load dependence. Bas...
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| Format: | Article |
| Language: | English |
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Wiley
2011-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2011/539252 |
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| author | Ronald Machaka Trevor E. Derry Iakovos Sigalas Mathias Herrmann |
| author_facet | Ronald Machaka Trevor E. Derry Iakovos Sigalas Mathias Herrmann |
| author_sort | Ronald Machaka |
| collection | DOAJ |
| description | The Vickers microhardness measurements of boron suboxide (B6O) ceramics prepared by uniaxial hot-pressing was investigated at indentation test loads in the range from 0.10 to 2.0 kgf. Results from the investigation indicate that the measured microhardness exhibits an indentation load dependence. Based on the results, we present a comprehensive model intercomparison study of indentation size effects (ISEs) in the microhardness measurements of hot-pressed B6O discussed using existing models, that is, the classical Meyer's law, Li and Bradt's proportional specimen resistance model (PSR), the modified proportional specimen resistance model (MPSR), and Carpinteri's multifractal scaling law (MFSL). The best correlation between literature-cited load-independent Vickers microhardness values, the measured values, and applied models was achieved in the case of the MPSR and the MFSL models. |
| format | Article |
| id | doaj-art-919be66f4d1b4dbbbb13e3668e7d7ec0 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2011-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-919be66f4d1b4dbbbb13e3668e7d7ec02025-02-03T06:44:19ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422011-01-01201110.1155/2011/539252539252Analysis of the Indentation Size Effect in the Microhardness Measurements in B6ORonald Machaka0Trevor E. Derry1Iakovos Sigalas2Mathias Herrmann3DST/NRF Centre of Excellence in Strong Materials, School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Johannesburg 2050, South AfricaDST/NRF Centre of Excellence in Strong Materials and School of Physics, University of the Witwatersrand, Johannesburg, Private Bag 3, Johannesburg 2050, South AfricaDST/NRF Centre of Excellence in Strong Materials, School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Johannesburg 2050, South AfricaFraunhofer Institute for Ceramic Technologies and Systems, Winterbergstra_e 28, 01277 Dresden, GermanyThe Vickers microhardness measurements of boron suboxide (B6O) ceramics prepared by uniaxial hot-pressing was investigated at indentation test loads in the range from 0.10 to 2.0 kgf. Results from the investigation indicate that the measured microhardness exhibits an indentation load dependence. Based on the results, we present a comprehensive model intercomparison study of indentation size effects (ISEs) in the microhardness measurements of hot-pressed B6O discussed using existing models, that is, the classical Meyer's law, Li and Bradt's proportional specimen resistance model (PSR), the modified proportional specimen resistance model (MPSR), and Carpinteri's multifractal scaling law (MFSL). The best correlation between literature-cited load-independent Vickers microhardness values, the measured values, and applied models was achieved in the case of the MPSR and the MFSL models.http://dx.doi.org/10.1155/2011/539252 |
| spellingShingle | Ronald Machaka Trevor E. Derry Iakovos Sigalas Mathias Herrmann Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O Advances in Materials Science and Engineering |
| title | Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O |
| title_full | Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O |
| title_fullStr | Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O |
| title_full_unstemmed | Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O |
| title_short | Analysis of the Indentation Size Effect in the Microhardness Measurements in B6O |
| title_sort | analysis of the indentation size effect in the microhardness measurements in b6o |
| url | http://dx.doi.org/10.1155/2011/539252 |
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