Thermophysical properties of YSZ and YCeSZ suspension plasma sprayed coatings having different microstructures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00476039" target="_blank" >RIV/61389021:_____/17:00476039 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.surfcoat.2017.02.054" target="_blank" >http://dx.doi.org/10.1016/j.surfcoat.2017.02.054</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfcoat.2017.02.054" target="_blank" >10.1016/j.surfcoat.2017.02.054</a>

Result language

angličtina

Original language name

Thermophysical properties of YSZ and YCeSZ suspension plasma sprayed coatings having different microstructures

Original language description

The paper describes the ceramic top coats of Thermal Barrier Coatings (TBC) obtained by Suspension Plasma Spraying (SPS). The spray process realized with different plasma torches allowed obtaining coatings having different morphology, namely, columnar-like and two-zones microstructure. The microstructures influenced the thermal transport properties of TBCs. The study analyses the thermophysical properties of yttria and yttria-with ceria- stabilized zirconia coatings, i.e. YSZ and YCeSZ, respectively. The spray processes were realized with the use of three different plasma spray torches: (i) SG-100, (ii) Axial III and (iii) hybrid WSP one. The deposition parameters were designed for each plasma torch separately. The microstructure of coatings was then analyzed using Optical and Scanning Electron Microscopy i.e.OMand SEM, respectively. The thermophysical properties of the coatings such as density, specific heat and thermal dilatation were measured using gas pycnometry, calorimetry and dilatometry methods respectively. The collected datawere used, togetherwith thermal diffusivity foundwith the use of laser flashmethod, to calculate the thermal conductivity of the deposits. The thermal conductivities of coatings were in a range from 0.63 to 0.99 [W/m·K] for YSZ samples and between 0.82 and 1.37 [W/m·K] in the case of YCeSZ coatings. Thermal transport properties were found to be influenced by the coatings porosity and their microstructure. Finally, the thermal conductivity values were successfully validated using response function method, which can be an alternative to complex FEM methods.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20506 - Coating and films

Project

<a href="/en/project/GA15-12145S" target="_blank" >GA15-12145S: Physical aspects of plasma spray deposition from liquid feedstock</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Volume of the periodical

318

Issue of the periodical within the volume

May

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

28-38

UT code for WoS article

000402356100005

EID of the result in the Scopus database

2-s2.0-85013649265