The fracture toughness of inorganic glasses

Rouxel, Tanguy; Yoshida, Satoshi

doi:10.1111/jace.15108

Cited by 115 publications

(99 citation statements)

References 120 publications

(172 reference statements)

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“…Indentation thus mimics real‐life damage incidents under controlled conditions, requiring relatively small sample area and with short experiment time . However, we note that it is important to distinguish between resistance to crack initiation and crack growth, as high crack initiation resistance (which is measured by indentation) does not necessarily entail large fracture toughness . By studying different glass compositions, Peter showed that the deformation mechanism of oxide glasses to indentation in general includes both densification and shear flow .…”

Section: Introductionmentioning

confidence: 90%

“…14,15 However, we note that it is important to distinguish between resistance to crack initiation and crack growth, as high crack initiation resistance (which is measured by indentation) does not necessarily entail large fracture toughness. 16 By studying different glass compositions, Peter showed that the deformation mechanism of oxide glasses to indentation in general includes both densification and shear flow. 17 Kato et al have shown that glass compositions prone to undergo densification during indentation can lower the residual stress acting as the driving force for cracking, since densification does not lead to an expansion of the plastic zone.…”

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confidence: 99%

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Competitive effects of free volume, rigidity, and self‐adaptivity on indentation response of silicoaluminoborate glasses

et al. 2019

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Lithium aluminoborate glasses have recently been found to feature high resistance to crack initiation during indentation, but suffer from relatively low hardness and chemical durability. To further understand the mechanical properties of this glass family and their correlation with the network structure, we here study the effect of adding SiO2 to a 25Li2O–20Al2O3–55B2O3 glass on the structure and mechanical properties. Addition of silica increases the average network rigidity, but meanwhile its open tetrahedral structure decreases the atomic packing density. Consequently, we only observe a minor increase in hardness and glass transition temperature, and a decrease in Poisson's ratio. The addition of SiO2, and thus removal of Al2O3 and/or B2O3, also makes the network less structurally adaptive to applied stress, since Al and B easily increase their coordination number under pressure, while this is not the case for Si under modest pressures. As such, although the silica‐containing networks have more free volume, they cannot densify more during indentation, which in turn leads to an overall decrease in crack resistance upon SiO2 addition. Our work shows that, although pure silica glass has very high glass transition temperature and relatively high hardness, its addition in oxide glasses does not necessarily lead to significant increase in these properties due to the complex structural interactions in mixed network former glasses and the competitive effects of free volume and network rigidity.

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Section: Introductionmentioning

confidence: 90%

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confidence: 99%

Competitive effects of free volume, rigidity, and self‐adaptivity on indentation response of silicoaluminoborate glasses

et al. 2019

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“…As a widely used material, glass exhibits excellent optical properties and multifunctionalities, but its applications are limited by its low crack resistance due to the lack of large deformation or toughening mechanism at ambient temperature. [1][2][3] For most commercial glasses, the two properties, that is, hardness and crack resistance are not compatible. 4 Therefore, hard and tough glasses are particularly desired in many fields such as vehicles, civil engineering, and electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Toward hard and highly crack resistant magnesium aluminosilicate glasses and transparent glass‐ceramics

Shan

et al. 2020

J Am Ceram Soc

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High hardness and high crack resistance are usually mutually exclusive in glass materials. Through the aerodynamic levitation and laser melting technique, we prepared a series of magnesium aluminosilicate glasses with a constant MgO content, and found a striking enhancement of both hardness and crack resistance with increasing Al2O3. The crack resistance of the magnesium aluminosilicate glass is about five times higher than that of the binary alumina‐silica glass for the similar [Al]/([Al] + [Si]) molar ratio (around 0.6). For the selected magnesium aluminosilicate glass with R = 0.32, when subjected to isothermal treatment at 1283K, we observed a further drastic enhancement of both hardness and crack resistance by extending the heating time. Based on the structural analyses, we propose an atomic‐scale model to explain the mechanism of synergetic enhancement in hardness and crack resistance for the magnesium aluminosilicate glasses and glass‐ceramics.

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“…For example, microscale lattice materials, metamaterials, photonic crystals, nano‐electromechanical (NEMS) and micro‐electromechanical systems (MEMS) are taking advantage of sub‐micrometer‐scale feature size effects in 3D . In these contexts, fabrication of components based on ceramic materials would expand the range of properties offered by polymers currently used for 3D nanoscale fabrications, allowing for higher refractoriness, increased chemical durability, better wear and oxidation resistance, higher elastic modulus and improved dimensional stability with temperature …”

Section: Introductionmentioning

confidence: 99%

3D Nanofabrication of SiOC Ceramic Structures

et al. 2018

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Shaping ceramic materials at the nanoscale in 3D is a phenomenal engineering challenge, that can offer new opportunities in a number of industrial applications, including metamaterials, nano‐electromechanical systems, photonic crystals, and damage‐tolerant lightweight materials. 3D fabrication of sub‐micrometer ceramic structures can be performed by two‐photon laser writing of a preceramic polymer. However, polymer conversion to a fully ceramic material has proven so far unfeasible, due to lack of suitable precursors, printing complexity, and high shrinkage during ceramic conversion. Here, it is shown that this goal can be achieved through an appropriate engineering of both the material and the printing process, enabling the fabrication of preceramic 3D shapes and their transformation into dense and crack‐free SiOC ceramic components with highly complex, 3D sub‐micrometer architectures. This method allows for the manufacturing of components with any 3D specific geometry with fine details down to 450 nm, rapidly printing structures up to 100 µm in height that can be converted into ceramic objects possessing sub‐micrometer features, offering unprecedented opportunities in different application fields.

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The fracture toughness of inorganic glasses

Cited by 115 publications

References 120 publications

Competitive effects of free volume, rigidity, and self‐adaptivity on indentation response of silicoaluminoborate glasses

Competitive effects of free volume, rigidity, and self‐adaptivity on indentation response of silicoaluminoborate glasses

Toward hard and highly crack resistant magnesium aluminosilicate glasses and transparent glass‐ceramics

3D Nanofabrication of SiOC Ceramic Structures

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