Thermal expansion and elastic moduli of electrolyte materials for high and intermediate temperature solid oxide fuel cell

Gao, Peipei; Bolon, Amy; Taneja, Manisha; Xie, Zhilin; Orlovskaya, Nina; Radović, Miladin

doi:10.1016/j.ssi.2016.11.015

Cited by 28 publications

(9 citation statements)

References 70 publications

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“…One of the other possible causes for the peculiar temperature dependence of the dynamic Young's modulus of 8YSZ is phase transition. There are several reports that show the phase transition have a large influence on Young's modulus [24][25][26]. Our previous studies also have confirmed that the dynamic Young's modulus of scandia-doped zirconia significantly decreased below the phase transition temperature, T* and then increased above T* with increasing temperature [9].…”

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confidence: 80%

Influence of Aging on Mechanical Properties of Yttria-Doped Zirconia

et al. 2018

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We evaluated the influence of aging on mechanical properties of 8% yttria-doped zirconia (8YSZ) from room temperature to 1200 K. The temperature dependence of the dynamic Young’s and shear moduli of 8YSZ with and without the aging treatment was investigated by using a resonance method. The dynamic Young’s and shear moduli of 8YSZ without the aging treatment decreased by 33% below 700 K and gradually increased at higher temperatures with increasing temperature. On the other hand, those with the aging treatments decreased by around 20% below 600 K while did not significantly change above 600 K with increasing temperature. These demonstrated the effect of aging on the dynamic Young’s and shear moduli of 8YSZ was most remarkable at intermediate temperatures (600~1000 K). Although it was suggested that the existence ratio of the metastable tetragonal phase was increased during the aging treatment, it is likely that the influence of this phase transition on the dynamic Young’s and shear moduli was not significant. It seemed that the difference in the dynamic Young’s and shear moduli of 8YSZ with and without the aging treatment at intermediate temperatures was due to the local ordering of the oxygen vacancies.

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confidence: 80%

Influence of Aging on Mechanical Properties of Yttria-Doped Zirconia

et al. 2018

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“…The other two are used to monitor the signal from the sample. RUSPEC software (Magnaflux, Glenview, IL) was used to determine the elastic constants at each temperature from the collected resonant spectra using a procedure described in more detail elsewhere [27,28]. Since all samples examined in this paper had polycrystalline structures with random orientations, they were treated as isotropic elastic solids.…”

Section: B Characterizationmentioning

confidence: 99%

Elastic properties, thermal stability, and thermodynamic parameters of MoAlB

et al. 2017

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MoAlB is the first and, so far, the only transition-metal boride that forms alumina when heated in air and is thus potentially useful for high-temperature applications. Herein, the thermal stability in argon and vacuum atmospheres and the thermodynamic parameters of bulk polycrystalline MoAlB were investigated experimentally. At temperatures above 1708 K, in vacuum and inert atmospheres, this compound incongruently melts into the binary MoB and liquid aluminum metal as confirmed by differential thermal analysis, quenching experiments, x-ray diffraction, and scanning electron microscopy. Making use of that information together with heat-capacity measurements in the 4-1000-K temperature range-successfully modeled as the sum of lattice, electronic, and dilation contributions-the standard enthalpy, entropy, and free energy of formation are computed and reported for the full temperature range. The standard enthalpy of formation of MoAlB at 298 K was found to be −132 ± 3.2 kJ/mol. Lastly, the thermal conductivity values are computed and modeled using a variation of the Slack model in the 300-1600-K temperature range.

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“…At temperatures above 500°C values of the elastic moduli increase with temperature up to 1000°C. Also included in Figure 4 are values determined by Gao et al using resonant ultrasound spectroscopy up to 900°C 20 and values determined by Kushi et al by impulse excitation up to 1000°C. 21 In both cases the results confirm the anomalous temperature dependence, which has been attributed to the anelastic relaxation of elastic (and dielectric) dipoles by hopping of oxygen vacancies around the cation and/or local ordering of oxygen vacancies.…”

Section: F I G U R Ementioning

confidence: 99%

“…21 However, high-temperature XRD results have shown that the cubic crystal structure is stable between room temperature and 1000°C. 20,22 Values of the bulk modulus of YSZ were determined using the following relationship:…”

Section: F I G U R Ementioning

confidence: 99%

On the nonlinear temperature dependence of residual stresses in solid oxide fuel cells

et al. 2020

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The residual stresses in a dense yttria-stabilized zirconia (YSZ) layer bonded to a porous NiO-YSZ substrate were measured by X-ray diffraction in air between 25°C and 900°C. It was found that the residual stresses on the outer surface of the YSZ layer were compressive, that their magnitude increased with decreasing temperature, and that the temperature dependence was nonlinear particularly at temperatures below 600°C. An elastic model that incorporates micromechanics and laminate theory was formulated to successfully predicts the nonlinearity of the temperature dependence of the residual stresses by accounting for the effect of the order-disorder transition experienced by YSZ around 600°C and the magnetic transition of NiO at the Néel temperature around 265°C, on the properties of these materials. The implications of the results for the reliability of solid oxide fuel cells are discussed.

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Thermal expansion and elastic moduli of electrolyte materials for high and intermediate temperature solid oxide fuel cell

Cited by 28 publications

References 70 publications

Influence of Aging on Mechanical Properties of Yttria-Doped Zirconia

Influence of Aging on Mechanical Properties of Yttria-Doped Zirconia

Elastic properties, thermal stability, and thermodynamic parameters of MoAlB

On the nonlinear temperature dependence of residual stresses in solid oxide fuel cells

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