| Autor: |
P. Paufler, S. Filatov, I. Shakhverdova, R. Bubnova, M. Reibold, B. Müller, A. Levin, D. Meyer |
| Předmět: |
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| Zdroj: |
Glass Physics & Chemistry; Jun2007, Vol. 33 Issue 3, p187-198, 12p |
| Abstrakt: |
Abstract The nanohardness (H) and microhardness (H M) of sodium borosilicate glasses with and without nanopores were studied. From nanoindentation measurements, along with the hardness H, the Young’s modulus E was derived. While both H and H M varied between ∼10 GPa and ∼7 GPa for the bulk glass, the values for nanoporous specimens were one order of magnitude lower at about 0.5 GPa. The Young’s moduli were found to be ∼82 GPa and ∼5 GPa for bulk and porous glasses, respectively. Cracks and pileups were observed, respectively, arising from microindents and nanoindents in the bulk glass, whereas none of them could be detected in the nanoporous material. The molecular structures of both glasses studied by X-ray diffraction are similar. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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