Interaction of strontium zirconate plasma sprayed coating with natural silicate (CMAS) dust-origin of luminescent phases

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00538136" target="_blank" >RIV/61389021:_____/20:00538136 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2079-6412/10/8/738/htm" target="_blank" >https://www.mdpi.com/2079-6412/10/8/738/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/COATINGS10080738" target="_blank" >10.3390/COATINGS10080738</a>

Result language

angličtina

Original language name

Interaction of strontium zirconate plasma sprayed coating with natural silicate (CMAS) dust-origin of luminescent phases

Original language description

Strontium zirconate (SrZrO3) commercial powder was plasma sprayed using a high-feedrate water-stabilized plasma system (WSP) torch. Coatings with a thickness of about 1 mm were produced. Now, we are concentrating on a topic never addressed for pure SrZrO3 coatings: how the coatings interact with natural dust, known as calcium-magnesium-aluminum-silicate (CMAS). We selected various regimes of thermal treatment where SrZrO3 coatings were exposed to CMAS, and studied chemical changes, phase changes and the microstructure evolution of the influenced coatings. Microhardness of the exposed coatings was monitored as well. The results would help to understand, how the excellent refractory material SrZrO3 interacts with natural silicates. We kept in mind that pure SrZrO3 is not optimal for a thermal barrier application because of high-temperature phase transformations, but to study the CMAS-induced phenomena in more complex compositions, for example La2Zr2O7-SrZrO3, is difficult and interpretations have not been completed currently. The value of the actual research is in the separation of the phenomena typical just for SrZrO3. A potential for newly developed phases to serve as a sacrificial components of various barrier-coating systems is discussed. Several physical aspects of the newly developed components are discussed as well, namely the luminescence. Here the dust-based phases shifted down the temperature at which luminescence can occur in pure SrZrO3 ceramics. The entire thickness of influenced layers was relatively high, around 300 μm. The amorphous component, predominant after short-term CMAS exposure, was subsequently crystallized to various phases, namely SrSiO3 and monoclinic as well as tetragonal zirconia.

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

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OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Coatings

ISSN

2079-6412

e-ISSN

—

Volume of the periodical

10

Issue of the periodical within the volume

8

Country of publishing house

CH - SWITZERLAND

Number of pages

15

Pages from-to

738

UT code for WoS article

000567154700001

EID of the result in the Scopus database

2-s2.0-85089508807