Equation for Estimating the Young&amp;rsquo;s Modulus, Shear Modulus and Vickers Hardness of Aluminosilicate Glasses

Inaba, Shigeki; Todaka, Shinichi; Ohta, Yoshio; Morinaga, Kenji

doi:10.2320/jinstmet1952.64.3_177

Cited by 29 publications

(31 citation statements)

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“…However, it is consistent with the values found in Ref. [25] where the longitudinal acoustic velocity is estimated from the measured elastic moduli to be 5995 m/s for a glass with molar composition 20Nd 2 O 3 -24Al 2 O 3 -56SiO 2 . This velocity is close enough to the pure silica value to comment that at these concentrations aluminum and neodymium have equal, but opposite effects on the acoustic velocity.…”

Section: Resultssupporting

confidence: 87%

Brillouin spectroscopy of Nd–Ge co-doped silica fibers

Dragic

2009

Journal of Non-Crystalline Solids

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Section: Resultssupporting

confidence: 87%

Brillouin spectroscopy of Nd–Ge co-doped silica fibers

Dragic

2009

Journal of Non-Crystalline Solids

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“…As a result, the glass with the highest Al 2 O 3 content ( x = 60) with mullite composition shows the highest elastic moduli and Vickers hardness. These values are comparable to hard glasses, such as R 2 O 3 –SiO 2 –Al 2 O 3 or CaO–SiO 2 –Al 2 O 3 glasses, and are much larger than those of crack-resistant silicate or borosilicate glasses789101112131819202122232425.…”

Section: Resultsmentioning

confidence: 79%

“…In case of alkali–alkaline earth silicate glasses, it was found that glasses with more packed structures had higher values of hardness and the elastic modulus6. Al 2 O 3 – R 2 O 3 and Al 2 O 3 –SiO 2 – R 2 O 3 glasses ( R : Y, Sc, or Ta) are among the hardest oxide glasses ( H V up to 9.5 GPa) with high elastic moduli ( E up to 169 GPa)78910111213. This is attributed to their high atomic packing density and high dissociation energy unit volume of components.…”

mentioning

confidence: 99%

Crack-resistant Al2O3–SiO2 glasses

Rosales-Sosa

Masuno

Higo

et al. 2016

Sci Rep

135

137

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Obtaining “hard” and “crack-resistant” glasses have always been of great important in glass science and glass technology. However, in most commercial glasses both properties are not compatible. In this work, colorless and transparent xAl2O3–(100–x)SiO2 glasses (30 ≤ x ≤ 60) were fabricated by the aerodynamic levitation technique. The elastic moduli and Vickers hardness monotonically increased with an increase in the atomic packing density as the Al2O3 content increased. Although a higher atomic packing density generally enhances crack formation in conventional oxide glasses, the indentation cracking resistance increased by approximately seven times with an increase in atomic packing density in binary Al2O3–SiO2 glasses. In particular, the composition of 60Al2O3•40SiO2 glass, which is identical to that of mullite, has extraordinary high cracking resistance with high elastic moduli and Vickers hardness. The results indicate that there exist aluminosilicate compositions that can produce hard and damage-tolerant glasses.

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“…The size of the rare‐earth ion will have a strong effect on a variety of mechanical properties via the change in packing density. Considering that C g = 0.517 is comparable to window silicate glass, the C g values of most rare‐earth aluminate glasses are much larger than those of conventional silicate glasses and similar to those of high elastic moduli Al 2 O 3 –SiO 2 – R 2 O 3 and Al 2 O 3 –Ta 2 O 5 glasses …”

Section: Resultsmentioning

confidence: 86%

“…Furthermore, in many cases, the atomic packing density of glasses increased with the Al 2 O 3 content. It was reported that glasses with a large amount of Al 2 O 3 , such as rare‐earth aluminosilicate, aluminosilicate, and aluminotantalate glasses, display the highest hardness and elastic moduli of oxide glasses …”

Section: Introductionmentioning

confidence: 99%

Effect of rare‐earth ion size on elasticity and crack initiation in rare‐earth aluminate glasses

et al. 2018

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In oxide glasses, “hardness” and “damage‐tolerance” are usually competing attributes. The main reason for this is that hard glasses usually have closely packed structures compared to those of damage‐resistant glasses. Recent progress on the mechanical properties of alumina‐rich glasses has thrown some light on how to obtain hard and damage‐tolerant glasses. In this work, the elastic properties and indentation behavior of a glass system based on (R = La, Sm, Gd, Er, Tm, Y), prepared by an aerodynamic levitation technique, was investigated. It was found that the rare‐earth ions exhibited a strong size effect on the mechanical properties of the glasses. The elastic moduli and hardness increased with the packing density and as the ionic radii of the rare‐earth ions decreased. In addition, the resistance to surface damage by indentation increased with larger rare‐earth cations. Our results show that the elastic properties and damage tolerance of rare‐earth aluminate glasses can be tuned depending on the ionic radii of rare‐earth ions.

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Equation for Estimating the Young’s Modulus, Shear Modulus and Vickers Hardness of Aluminosilicate Glasses

Cited by 29 publications

References 0 publications

Brillouin spectroscopy of Nd–Ge co-doped silica fibers

Brillouin spectroscopy of Nd–Ge co-doped silica fibers

Crack-resistant Al2O3–SiO2 glasses

Effect of rare‐earth ion size on elasticity and crack initiation in rare‐earth aluminate glasses

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