Thermal Expansions of Heterogeneous Solids Containing Aligned Ellipsoidal Inclusions

Wakashima, Kenji; Otsuka, Masafumi; Umekawa, Sokichi

doi:10.1177/002199837400800407

Cited by 111 publications

(19 citation statements)

References 7 publications

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“…A considerable amount of work has been done to predict the thermal expansion coefficients of composites. [37][38][39] The rule of mixtures serves as the first order approximation to the overall calculation of the coefficient of thermal expansion of the composite. 40 This can be expressed as…”

Section: Coefficient Of Thermal Expansion (Cte)mentioning

confidence: 99%

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications

Anjana¹,

Uma²,

Philip³

et al. 2010

J of Applied Polymer Sci

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Polytetrafluroethylene (PTFE) composites filled with CeO 2 were prepared by powder processing technique. The PTFE is used as the matrix and the loading fraction of CeO 2 in the composite varied up to 0.6 volume fraction. The thermal conductivity and coefficient of thermal expansion were studied in relation to filler concentration. The thermal conductivity increased and coefficient of thermal expansion decreased with increase in CeO 2 content. For 0.6 volume fraction loading of the ceramic, the composite has a thermal conductivity of 3.1 W/m C and coefficient of thermal expansion 19.6 ppm/ C. Different theoretical approaches have been employed to predict the effective thermal conductivity and coefficient of thermal expansion of composite systems and the results were compared with the experimental data.

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Section: Coefficient Of Thermal Expansion (Cte)mentioning

confidence: 99%

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications

Anjana¹,

Uma²,

Philip³

et al. 2010

J of Applied Polymer Sci

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“…Research carried out using Eshelby's [9] inclusion technique to obtain homogenization relations applicable for both the calculation of elastic constants [10] and for the modelling of inelastic behaviours [11] such as creep will be presented along the paper. A self-consistent model used to calculate 75 the thermal expansion of a multiphase aggregate based on some of the results obtained by Wakashima et al [12] will also be presented.…”

mentioning

confidence: 99%

“…The coefficient of thermal expansion, α, is calculated using an expression derived upon the same hypotheses used by Wakashima et al [12], modified to make use of the self-consistency approach and generalised to take into account the presence of several phases, yielding…”

mentioning

confidence: 99%

Modelling the high temperature behaviour of TBCs using sequentially coupled microstructural–mechanical FE analyses

Hermosilla

Karunaratne

Jones

et al. 2009

Materials Science and Engineering: A

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Thermal barrier coatings provide a means of thermal insulation of gas turbine components exposed to elevated temperatures. They undergo severe microstructural changes and material degradation, which have been implemented in this work by means of a sequentially coupled microstructural mechanical calculation that made use of a self-consistent constitutive model within finite element calculations. Analyses for different temperatures and bond coat compositions were run, which reproduced the trends reported in previous research and identified the accumulation of high out-of-plane tensile stresses within the alumina layer as an additional phenomenon that could drive high temperature crack nucleation.

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“…Hermosilla et al [27] calculate the CTE of a phase aggregate using a modified version of an expression derived by Wakashima et al [28] given by…”

Section: Mixtures Of Phasesmentioning

confidence: 99%

Modelling the coefficient of thermal expansion in Ni-based superalloys and bond coatings

et al. 2016

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The coefficient of thermal expansion (CTE) of nickel-based superalloys and bond coat layers was modelled by considering contributions from their constituent phases. The equilibrium phase composition of the examined materials was determined using thermodynamic equilibrium software with an appropriate database for Nibased alloys, whereas the CTE and elastic properties of the principal phases were modelled using published data. The CTEs of individual phases were combined using a number of approaches to determine the CTE of the phase aggregate. As part of this work, the expansion coefficients of the superalloy IN-738LC and bond coat Amdry-995 were measured as a function of temperature and compared with the model predictions. The predicted values were also validated with the published data for the single-crystal superalloy CMSX-4 and a number of other Ni-based alloy compositions at 1000 K. A very good agreement between experiment and model output was found, especially up to 800 C. The modelling approaches discussed in this paper have the potential to be an extremely useful tool for the industry and for the designers of new coating systems.

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Thermal Expansions of Heterogeneous Solids Containing Aligned Ellipsoidal Inclusions

Cited by 111 publications

References 7 publications

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications

Modelling the high temperature behaviour of TBCs using sequentially coupled microstructural–mechanical FE analyses

Modelling the coefficient of thermal expansion in Ni-based superalloys and bond coatings

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Thermal Expansions of Heterogeneous Solids Containing Aligned Ellipsoidal Inclusions

Cited by 111 publications

References 7 publications

Thermal properties of low loss PTFE‐CeO2 dielectric ceramic composites for microwave substrate applications

Thermal properties of low loss PTFE‐CeO2 dielectric ceramic composites for microwave substrate applications

Modelling the high temperature behaviour of TBCs using sequentially coupled microstructural–mechanical FE analyses

Modelling the coefficient of thermal expansion in Ni-based superalloys and bond coatings

Contact Info

Product

Resources

About

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications

Thermal properties of low loss PTFE‐CeO₂ dielectric ceramic composites for microwave substrate applications