Soda–borosilicate glass: normal or anomalous behavior under Vickers indentation?

Bertoldi, Massimo

doi:10.1016/j.jnoncrysol.2004.07.024

Cited by 30 publications

(26 citation statements)

References 24 publications

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“…For instance, Bertoldi & Sglavo [42] observed a transition from 'normal' (i.e. radial/median) to 'anomalous' (i.e.…”

Section: Perspectives (A) Fracture Toughness Determinationmentioning

confidence: 99%

Driving force for indentation cracking in glass: composition, pressure and temperature dependence

Rouxel

2015

Phil. Trans. R. Soc. A.

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The occurrence of damage at the surface of glass parts caused by sharp contact loading is a major issue for glass makers, suppliers and end-users. Yet, it is still a poorly understood problem from the viewpoints both of glass science and solid mechanics. Different microcracking patterns are observed at indentation sites depending on the glass composition and indentation cracks may form during both the loading and the unloading stages. Besides, we do not know much about the fracture toughness of glass and its composition dependence, so that setting a criterion for crack initiation and predicting the extent of the damage yet remain out of reach. In this study, by comparison of the behaviour of glasses from very different chemical systems and by identifying experimentally the individual contributions of the different rheological processes leading to the formation of the imprint-namely elasticity, densification and shear flow-we obtain a fairly straightforward prediction of the type and extent of the microcracks which will most likely form, depending on the physical properties of the glass. Finally, some guidelines to reduce the driving force for microcracking are proposed in the light of the effects of composition, temperature and pressure, and the areas for further research are briefly discussed.

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“…For instance, Bertoldi & Sglavo [42] observed a transition from 'normal' (i.e. radial/median) to 'anomalous' (i.e.…”

Section: Perspectives (A) Fracture Toughness Determinationmentioning

confidence: 99%

Driving force for indentation cracking in glass: composition, pressure and temperature dependence

Rouxel

2015

Phil. Trans. R. Soc. A.

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“…Following this discovery by Sehgal & Ito, others also found that some glasses could exhibit a so-called "intermediate" indentation response. (11)(12)(13) The intermediate glasses take on some characteristics of both normal and anomalous behaviour under the Vickers indenter. cracks than fused silica glass.…”

Section: Introductionmentioning

confidence: 99%

“…In order to understand these cracking behaviour of various glasses, several physical parameters, such as the density, Poisson's ratios and the coordination of boron in the glass have been correlated with the cracking behaviour. (10)(11)(12)(13)(14) It is well known that phase structures influence certain physical and chemical properties of glasses. (15)(16)(17) It has been reported that the fracture toughness of glasses is influenced by the phase separated structure.…”

Section: Introductionmentioning

confidence: 99%

Indentation cracking behaviour and structures of nanophase separation of glasses

Cheng¹,

Song²,

Ercius³

et al. 2017

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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“…Figure 4 shows typical 2 kg indentations in the HP and SPS-1227 specimens. The indentation in the HP specimen shows ring cracking and spalling typical of anomalous glasses in which the glass densifies under the pressure of the indentation [18,19]. The classical radial cracks around the indentation in the SPS-1227 specimen are more like those in normal ceramics.…”

Section: Phase Composition and Microstructurementioning

confidence: 93%

In-situ synthesis and sintering of mullite glass composites by SPS

Zhang

Zhan

et al. 2014

J Adv Ceram

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Abstract:The main subject of this work is an investigation of the effects of heating rate and current on the crystallisation of amorphous precursors in spark plasma sintering (SPS). For this, dry gel of Al 2 O 3 -SiO 2 with a molar ratio of 1:1, was synthesized and sintered in-situ by SPS, and also by hot pressing (HP) for comparison. Phase analysis showed that the only crystalline product in both cases was mullite, whose Al 2 O 3 content was lower in the SPS specimens. The microstructures showed a low volume fraction of large mullite fibers in the SPS specimens, whereas a high volume fraction of fine equiaxed grains was present in the HP specimen. The main difference in microstructure between HP and SPS specimens could be explained in terms of the higher heating rate of the SPS specimens. The size of the SPS die also affected the size and aspect ratio of the mullite fibers produced, which might have been due to either the different electrical current required or a difference in specimen temperature profile.

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Soda–borosilicate glass: normal or anomalous behavior under Vickers indentation?

Cited by 30 publications

References 24 publications

Driving force for indentation cracking in glass: composition, pressure and temperature dependence

Driving force for indentation cracking in glass: composition, pressure and temperature dependence

Indentation cracking behaviour and structures of nanophase separation of glasses

In-situ synthesis and sintering of mullite glass composites by SPS

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