Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics
Room temperature fracture toughness and hardness of spark plasma sintered pure B4C ceramics with grain sizes ranging from 120 nm to 17 μm have been studied. Vickers indentation and single edge V-notched beam (SEVNB) techniques have been used to measure hardness and fracture toughness, respectively....
| Prif Awduron: | , , , |
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| Fformat: | Journal article |
| Iaith: | English |
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European Ceramic Society
2016
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| _version_ | 1826311688700297216 |
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| author | Moshtaghioun, BM Gomez-Garcia, D Dominguez-Rodriguez, A Todd, RI |
| author_facet | Moshtaghioun, BM Gomez-Garcia, D Dominguez-Rodriguez, A Todd, RI |
| author_sort | Moshtaghioun, BM |
| collection | OXFORD |
| description | Room temperature fracture toughness and hardness of spark plasma sintered pure B4C ceramics with grain sizes ranging from 120 nm to 17 μm have been studied. Vickers indentation and single edge V-notched beam (SEVNB) techniques have been used to measure hardness and fracture toughness, respectively. A critical analysis of the results derived from these two techniques has been carried out and the conditions for proper comparison of the derived results are discussed. The results have shown that hardness follows the Hall–Petch dependence with either grain size or twin spacing when the effect of porosity is corrected for. On the contrary, fracture toughness is found to be essentially grain size independent. The value of this quantity is ∼2 MPa m1/2. |
| first_indexed | 2024-03-07T08:14:56Z |
| format | Journal article |
| id | oxford-uuid:f8f9aae4-e38e-433c-8fc4-74745b133080 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T08:14:56Z |
| publishDate | 2016 |
| publisher | European Ceramic Society |
| record_format | dspace |
| spelling | oxford-uuid:f8f9aae4-e38e-433c-8fc4-74745b1330802023-12-13T11:01:30ZGrain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramicsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f8f9aae4-e38e-433c-8fc4-74745b133080EnglishSymplectic Elements at OxfordEuropean Ceramic Society2016Moshtaghioun, BMGomez-Garcia, DDominguez-Rodriguez, ATodd, RIRoom temperature fracture toughness and hardness of spark plasma sintered pure B4C ceramics with grain sizes ranging from 120 nm to 17 μm have been studied. Vickers indentation and single edge V-notched beam (SEVNB) techniques have been used to measure hardness and fracture toughness, respectively. A critical analysis of the results derived from these two techniques has been carried out and the conditions for proper comparison of the derived results are discussed. The results have shown that hardness follows the Hall–Petch dependence with either grain size or twin spacing when the effect of porosity is corrected for. On the contrary, fracture toughness is found to be essentially grain size independent. The value of this quantity is ∼2 MPa m1/2. |
| spellingShingle | Moshtaghioun, BM Gomez-Garcia, D Dominguez-Rodriguez, A Todd, RI Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title | Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title_full | Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title_fullStr | Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title_full_unstemmed | Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title_short | Grain size dependence of hardness and fracture toughness in pure near fully-dense boron carbide ceramics |
| title_sort | grain size dependence of hardness and fracture toughness in pure near fully dense boron carbide ceramics |
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