The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
Ofer Tevet - One of the best experts on this subject based on the ideXlab platform.
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Effect of Initial Particle and Agglomerate Size on the Elastic Moduli of Porous Yttria (Y2O3)
Journal of the American Ceramic Society, 2009Co-Authors: O. Yeheskel, Menashe Shokhat, Shai Salhov, Ofer TevetAbstract:The present study shows the effect of porosity on the dynamic Elastic Moduli of partially dense yttria (Y2O3). This article reveals that the sound velocities and the Elastic Moduli of the porous samples depend not only on density, but also upon the reciprocal of the initial particle and agglomerate size. These findings explain some of the variation in the Elastic Moduli found especially, but not only, for highly porous yttria.
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Elastic Moduli of transparent yttria
Journal of the American Ceramic Society, 2004Co-Authors: Ori Yeheskel, Ofer TevetAbstract:The Elastic Moduli of yttria (Y2O3) samples that were made from powders with various particle morphologies were studied by means of ultrasonic measurements. The soundwave velocities in the longitudinal and transverse modes were measured. The Elastic Moduli were calculated from the sound velocities and density. For the high-purity, highdensity (>5000 kg/m 3 )Y 2O3 that was prepared in the present study, the average density and Elastic Moduli (and their standard deviations) were as follows: density (r) of 5020 ± 18 kg/m 3 , Young’s modulus (E) of 179.8 ± 4.8 GPa, shear modulus (G) of 69.2 ± 2.0 GPa, bulk modulus ( B) of 148.9 ± 3.0 GPa, and Poisson’s ratio ( n) of 0.299 ± 0.004. The average longitudinal and transverse soundwave velocities (Vl and Vt, respectively) were 6931 ± 65 and 3712 ± 49 m/s, respectively. The Elastic Moduli of lanthana-strengthened yttria (LSY) were ~6% lower than those of high-purity Y2O3, and the n value for LSY was ~0.304. It has been argued that soundwave velocity is better than density, in regard to predicting the Elastic Moduli of fully dense and slightly porous materials. A linear equation that describes the change of the Elastic Moduli with soundwave velocity alone has been suggested. This equation was applicable to a relative Elastic Moduli range of 0.75‐1.02.
B Champagnon - One of the best experts on this subject based on the ideXlab platform.
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Elastic Moduli of permanently densified silica glasses
Scientific Reports, 2015Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. Mermet, B ChampagnonAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
Thierry Deschamps - One of the best experts on this subject based on the ideXlab platform.
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Elastic Moduli of Permanently Densified
2020Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. MermetAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
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Elastic Moduli of permanently densified silica glasses
Scientific Reports, 2015Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. Mermet, B ChampagnonAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
A. Mermet - One of the best experts on this subject based on the ideXlab platform.
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Elastic Moduli of Permanently Densified
2020Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. MermetAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
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Elastic Moduli of permanently densified silica glasses
Scientific Reports, 2015Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. Mermet, B ChampagnonAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
Jérémie Margueritat - One of the best experts on this subject based on the ideXlab platform.
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Elastic Moduli of Permanently Densified
2020Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. MermetAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.
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Elastic Moduli of permanently densified silica glasses
Scientific Reports, 2015Co-Authors: Thierry Deschamps, Jérémie Margueritat, C. Martinet, A. Mermet, B ChampagnonAbstract:Modelling the mechanical response of silica glass is still challenging, due to the lack of knowledge concerning the Elastic properties of intermediate states of densification. An extensive Brillouin Light Scattering study on permanently densified silica glasses after cold compression in diamond anvil cell has been carried out, in order to deduce the Elastic properties of such glasses and to provide new insights concerning the densification process. From sound velocity measurements, we derive phenomenological laws linking the Elastic Moduli of silica glass as a function of its densification ratio. The found Elastic Moduli are in excellent agreement with the sparse data extracted from literature, and we show that they do not depend on the thermodynamic path taken during densification (room temperature or heating). We also demonstrate that the longitudinal sound velocity exhibits an anomalous behavior, displaying a minimum for a densification ratio of 5%, and highlight the fact that this anomaly has to be distinguished from the compressibility anomaly of a-SiO2 in the Elastic domain.