Modeling of the effective elastic and thermal properties of glass-ceramic solid oxide fuel cell seal materials

Milhans, Jacqueline; Ahzi, Saı̈d; Garmestani, Hamid; Khaleel, Mohammad A.; X, Sun; Koeppel, Brian J.

doi:10.1016/j.matdes.2008.07.014

Cited by 18 publications

(4 citation statements)

References 16 publications

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“…The higher volume fraction of crystals in the HJ3 glass–ceramic made this system stiffer than the HJ4 glass–ceramic. Similar behavior was observed by Milhans et al [30], where reduced modulus was observed to increase with increasing volume content of the crystalline phases in the glass–ceramics, as measured by nanoindentation. Zhao et al [31] also compared the elastic modulus of different glass–ceramic systems having different amounts of the residual glassy phases.…”

Section: Resultssupporting

confidence: 88%

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Shear Performance at Room and High Temperatures of Glass–Ceramic Sealants for Solid Oxide Electrolysis Cell Technology

et al. 2019

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To provide a reliable integration of components within a solid oxide electrolysis cell stack, it is fundamental to evaluate the mechanical properties of the glass–ceramic sealing materials, as well as the stability of the metal–glass–ceramic interface. In this work, the mechanical behavior of two previously developed glass–ceramic sealants joined to Crofer22APU steel is investigated at room temperature, 650 °C, and 850 °C under shear load. The mechanical properties of both the glass–ceramics showed temperature dependence. The shear strength of Crofer22APU/glass–ceramic/Crofer22APU joints ranged from 14.1 MPa (20 °C) to 1.8 MPa (850 °C). The elastic modulus of both glass–ceramics also reduced with temperature. The volume fraction of the crystalline phases in the glass–ceramics was the key factor for controlling the mechanical properties and fracture, especially above the glass-transition temperature.

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Section: Resultssupporting

confidence: 88%

“…This is due to the presence of cristobalite (SiO 2 ) phase in the HJ4 glass–ceramic [24,32]. Nevertheless, the obtained elastic moduli for both the systems (HJ3 and HJ4) are comparable or slightly higher than the elastic modulus of the glass–ceramics available in the literature (50–80 GPa) [8,22,30,31,33,34].…”

Section: Resultsmentioning

confidence: 99%

Shear Performance at Room and High Temperatures of Glass–Ceramic Sealants for Solid Oxide Electrolysis Cell Technology

et al. 2019

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“…To reveal the quantitative relationship between domain size and CTE, the size and distribution of the domains were quantified from the binarized image obtained by optical polarizing microscopy. Many researchers have applied Turner's work to examine CTEs of anisotropic thermal expansion ceramics and composites. Turner investigated the behavior of CTE in composites or polycrystalline solids and found that when the bulk modulus or rigidity of two crystals differs, the CTE of their composite cannot be shown in direct proportion to volume fraction.…”

Section: Resultsmentioning

confidence: 99%

Effect of Microstructure on the Thermal Expansion Coefficient of Sintered Cordierite Prepared from Sol Mixtures

et al. 2013

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Dense cordierite ceramics were prepared from a sol mixture of alumina, silica, and magnesia, and the relationship between microstructure and thermal expansion was clarified for sinters with relative density greater than 97%. In the dense cordierite ceramics, submicrometer-sized primary cordierite crystals aligned in the same crystal orientation and constituted the domain structure. We discovered that these domain structures could be easily observed by optical polarizing microscopy and quantified by digital image analysis of the photographs. The occurrence of microcracks between domains larger than 40 lm was induced by the thermal expansion anisotropy of the cordierite crystal axes. As a result, the mean thermal expansion coefficient of the cordierite ceramics decreased to 0.4 3 10 −6 K −1 from the average value of the crystal axes of 1.7 3 10 −6 K −1 . This lower thermal expansion coefficient could be theoretically explained by partial microcracking.

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“…Two types of models of the thermal properties of a material, namely analytical and numerical [20], are present in the literature. Usually, the Voigt and Reuss bounds [21] and the Hashin-Shtrikman bounds [22][23][24] are used for-preliminary and fast verification of the produced composites. A number of other theoretical models such as Turner model [25], Kernel model [26], Maxwell-Eucken model or the Effective Medium Theory [27] are reported in the professional literature.…”

Section: Modelling Of Cu-aln Thermal Propertiesmentioning

confidence: 99%

Comparison of experimental and modelling results of thermal properties in Cu-AlN composite materials

Chmielewski

Węglewski

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Copper-based composites could be widely used in automotive, electronic or electrical industry due to their very promising thermal properties. In the present paper, Cu-AlN metal matrix composites with ceramic volume fractions between 0.1 and 0.4 were fabricated by hot pressing method in vacuum. Dependence of the coefficient of thermal expansion (CTE) and the thermal conductivity (TC) on the chemical composition of composites has been investigated. The measured values of the thermal expansion coefficient have been compared with the analytical models’ predictions. A numerical model based on FEAP 7.5 in 3D space has been used to evaluate the influence of the porosity on the thermal properties (thermal conductivity) of the composite. A fairly good correlation between the FEM results and the experimental measurements has been obtained.

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Modeling of the effective elastic and thermal properties of glass-ceramic solid oxide fuel cell seal materials

Cited by 18 publications

References 16 publications

Shear Performance at Room and High Temperatures of Glass–Ceramic Sealants for Solid Oxide Electrolysis Cell Technology

Shear Performance at Room and High Temperatures of Glass–Ceramic Sealants for Solid Oxide Electrolysis Cell Technology

Effect of Microstructure on the Thermal Expansion Coefficient of Sintered Cordierite Prepared from Sol Mixtures

Comparison of experimental and modelling results of thermal properties in Cu-AlN composite materials

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