Comments on 'An extended hardness limit in bulk nanoceramics' by J.A. Wollmershauser, B.N. Feigelson, E.P. Gorzkowski, C.T. Ellis, R. Goswami, S.B. Qadri, J.G. Tischler, F.J. Kub, R.K. Everett, Acta Materialia 69 (2014) 9–16
| Autor: | Andreas Krell |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 2014 |
| Předmět: |
spinel
Materials science Mineralogy engineering.material Cubic crystal system Nanoceramic Condensed Matter::Materials Science Lattice (order) Indentation nanoceramic General Materials Science Ceramic Grain boundary strengthening Condensed matter physics Mechanical Engineering Spinel Metals and Alloys Hall-Petch Condensed Matter Physics Grain size nanocrystalline ceramic Mechanics of Materials visual_art engineering visual_art.visual_art_medium high-pressure sintering |
| Zdroj: | Scripta Materialia. 92:63-64 |
| ISSN: | 1359-6462 |
| DOI: | 10.1016/j.scriptamat.2014.08.015 |
| Popis: | The recently suggested validity of the Hall-Petch relationship for transparent spinel ceramics with grain sizes down to 28 nm is discussed here regarding the equivalence of grain size and indentation size effects. The quantitative characterization of the samples investigated as transparent needs a correction of the authors' calculation of the theoretical transmittance. For fundamental physical reasons, this theoretical transmission of ceramics with a cubic crystal lattice does not exhibit an intrinsic grain size influence. |
| Databáze: | OpenAIRE |
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