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Influence of embedded MoSi2 particles on the high temperature thermal conductivity of SPS produced yttria-stabilised zirconia model thermal barrier coatings. / Kulczyk-Malecka, Justyna; Zhang, Xun; Carr, James; Carabat, Alexandra L.; Sloof, Willem G.; van der Zwaag, Sybrand; Cernuschi, Federico; Nozahic, Franck; Monceau, Daniel; Estournès, Claude; Withers, Philip J.; Xiao, Ping.

In: Surface and Coatings Technology, Vol. 308, 2016, p. 31-39.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Kulczyk-Malecka, J, Zhang, X, Carr, J, Carabat, AL, Sloof, WG, van der Zwaag, S, Cernuschi, F, Nozahic, F, Monceau, D, Estournès, C, Withers, PJ & Xiao, P 2016, 'Influence of embedded MoSi2 particles on the high temperature thermal conductivity of SPS produced yttria-stabilised zirconia model thermal barrier coatings' Surface and Coatings Technology, vol. 308, pp. 31-39. https://doi.org/10.1016/j.surfcoat.2016.07.113

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Vancouver

Author

Kulczyk-Malecka, Justyna ; Zhang, Xun ; Carr, James ; Carabat, Alexandra L. ; Sloof, Willem G. ; van der Zwaag, Sybrand ; Cernuschi, Federico ; Nozahic, Franck ; Monceau, Daniel ; Estournès, Claude ; Withers, Philip J. ; Xiao, Ping. / Influence of embedded MoSi2 particles on the high temperature thermal conductivity of SPS produced yttria-stabilised zirconia model thermal barrier coatings. In: Surface and Coatings Technology. 2016 ; Vol. 308. pp. 31-39.

BibTeX

@article{230c1498ed014f3c81421a925f76dea8,
title = "Influence of embedded MoSi2 particles on the high temperature thermal conductivity of SPS produced yttria-stabilised zirconia model thermal barrier coatings",
abstract = "To prolong the lifetime of thermal barrier coatings (TBCs) recently a new method of microcrack healing has been developed, which relies on damage initiated thermal decomposition of embedded molybdenum disilicide (MoSi2) particles within the TBC matrix. While these MoSi2 particles have a beneficial effect on the structural stability of the TBC, the high thermal conductivity of MoSi2 may have an unfavourable but as yet unquantified impact on the thermal conductivity of the TBCs. In this work the thermal conductivity of spark plasma sintering (SPS) produced yttria-stabilised zirconia (YSZ) model thermal barrier coatings containing 10 or 20 vol.{\%} of MoSi2 healing particles was investigated using the laser flash method. Measurements were performed on free-standing composite material over a temperature range from room temperature up to 1000 °C. Microstructural analysis was carried out by SEM combined with image analysis to determine the size, distribution and area fraction of healing particles. The measurements were compared with the results from microstructure-based multi-physics finite element (FE) models and analytical models (the asymmetric Bruggeman model and the Nielsen model) in order to study the effects of the addition of MoSi2 particles as well as the presence of micro-pores on the apparent thermal conductivity. The results show a strongly non-linear increase in the thermal conductivity of the composite material with the MoSi2 volume fraction and a dependence on the aspect ratio of MoSi2 particles. Interparticle connectivity is shown to play a big role too.",
keywords = "Self-healing materials, Spark plasma sintering, Thermal barrier coatings, Thermal conductivity",
author = "Justyna Kulczyk-Malecka and Xun Zhang and James Carr and Carabat, {Alexandra L.} and Sloof, {Willem G.} and {van der Zwaag}, Sybrand and Federico Cernuschi and Franck Nozahic and Daniel Monceau and Claude Estourn{\`e}s and Withers, {Philip J.} and Ping Xiao",
year = "2016",
doi = "10.1016/j.surfcoat.2016.07.113",
language = "English",
volume = "308",
pages = "31--39",
journal = "Surface and Coatings Technology",
issn = "0257-8972",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Influence of embedded MoSi2 particles on the high temperature thermal conductivity of SPS produced yttria-stabilised zirconia model thermal barrier coatings

AU - Kulczyk-Malecka, Justyna

AU - Zhang, Xun

AU - Carr, James

AU - Carabat, Alexandra L.

AU - Sloof, Willem G.

AU - van der Zwaag, Sybrand

AU - Cernuschi, Federico

AU - Nozahic, Franck

AU - Monceau, Daniel

AU - Estournès, Claude

AU - Withers, Philip J.

AU - Xiao, Ping

PY - 2016

Y1 - 2016

N2 - To prolong the lifetime of thermal barrier coatings (TBCs) recently a new method of microcrack healing has been developed, which relies on damage initiated thermal decomposition of embedded molybdenum disilicide (MoSi2) particles within the TBC matrix. While these MoSi2 particles have a beneficial effect on the structural stability of the TBC, the high thermal conductivity of MoSi2 may have an unfavourable but as yet unquantified impact on the thermal conductivity of the TBCs. In this work the thermal conductivity of spark plasma sintering (SPS) produced yttria-stabilised zirconia (YSZ) model thermal barrier coatings containing 10 or 20 vol.% of MoSi2 healing particles was investigated using the laser flash method. Measurements were performed on free-standing composite material over a temperature range from room temperature up to 1000 °C. Microstructural analysis was carried out by SEM combined with image analysis to determine the size, distribution and area fraction of healing particles. The measurements were compared with the results from microstructure-based multi-physics finite element (FE) models and analytical models (the asymmetric Bruggeman model and the Nielsen model) in order to study the effects of the addition of MoSi2 particles as well as the presence of micro-pores on the apparent thermal conductivity. The results show a strongly non-linear increase in the thermal conductivity of the composite material with the MoSi2 volume fraction and a dependence on the aspect ratio of MoSi2 particles. Interparticle connectivity is shown to play a big role too.

AB - To prolong the lifetime of thermal barrier coatings (TBCs) recently a new method of microcrack healing has been developed, which relies on damage initiated thermal decomposition of embedded molybdenum disilicide (MoSi2) particles within the TBC matrix. While these MoSi2 particles have a beneficial effect on the structural stability of the TBC, the high thermal conductivity of MoSi2 may have an unfavourable but as yet unquantified impact on the thermal conductivity of the TBCs. In this work the thermal conductivity of spark plasma sintering (SPS) produced yttria-stabilised zirconia (YSZ) model thermal barrier coatings containing 10 or 20 vol.% of MoSi2 healing particles was investigated using the laser flash method. Measurements were performed on free-standing composite material over a temperature range from room temperature up to 1000 °C. Microstructural analysis was carried out by SEM combined with image analysis to determine the size, distribution and area fraction of healing particles. The measurements were compared with the results from microstructure-based multi-physics finite element (FE) models and analytical models (the asymmetric Bruggeman model and the Nielsen model) in order to study the effects of the addition of MoSi2 particles as well as the presence of micro-pores on the apparent thermal conductivity. The results show a strongly non-linear increase in the thermal conductivity of the composite material with the MoSi2 volume fraction and a dependence on the aspect ratio of MoSi2 particles. Interparticle connectivity is shown to play a big role too.

KW - Self-healing materials

KW - Spark plasma sintering

KW - Thermal barrier coatings

KW - Thermal conductivity

UR - http://www.scopus.com/inward/record.url?scp=85001950302&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2016.07.113

DO - 10.1016/j.surfcoat.2016.07.113

M3 - Article

VL - 308

SP - 31

EP - 39

JO - Surface and Coatings Technology

T2 - Surface and Coatings Technology

JF - Surface and Coatings Technology

SN - 0257-8972

ER -

ID: 9881322