Crack propagation through phase-separated glasses: effect of the characteristic size of disorder

We perform fracture experiments on nanoscale phase-separated glasses and measure crack surface roughness by atomic force microscopy. The ability of tuning the phase domain size by thermal treatment allows us to test thoroughly the predictions of crack front depinning models about the scaling propert...

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Veröffentlicht in:	Physical review letters 2008-12, Vol.101 (25), p.255501-255501, Article 255501
Hauptverfasser:	Dalmas, Davy, Lelarge, Anne, Vandembroucq, Damien
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Sprache:	eng
Schlagworte:	Condensed Matter Other Physics
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container_title	Physical review letters
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creator	Dalmas, Davy Lelarge, Anne Vandembroucq, Damien
description	We perform fracture experiments on nanoscale phase-separated glasses and measure crack surface roughness by atomic force microscopy. The ability of tuning the phase domain size by thermal treatment allows us to test thoroughly the predictions of crack front depinning models about the scaling properties of crack surface roughness. It appears that, in the range of validity of these depinning models developed for the fracture of brittle materials, our experimental results show a quantitative agreement with theoretical predictions: Beyond the characteristic size of disorder, the roughness of crack surfaces obeys the logarithmic scaling early predicted by Ramanathan, Ertaş, and Fisher [Phys. Rev. Lett. 79, 873 (1997)].
doi_str_mv	10.1103/PhysRevLett.101.255501
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title	Crack propagation through phase-separated glasses: effect of the characteristic size of disorder
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