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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GA15-12145S" target="_blank" >GA15-12145S: Fyzikální aspekty depozice plazmových nástřiků z kapalné fáze</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Surface and Coatings Technology

ISSN

0257-8972

e-ISSN

—

Svazek periodika

318

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

28-38

Kód UT WoS článku

000402356100005

EID výsledku v databázi Scopus

2-s2.0-85013649265