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The formation of pyrochlores during plasma spraying of REO and zirconia oxides powder mixture
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Title: The formation of pyrochlores during plasma spraying of REO and zirconia oxides powder mixture

Creator:

Kubaszek, Tadeusz ; Nowak, Wojciech J. ; Pędrak, Paweł ; Trybus, Kinga ; Ślemp, Karol ; Góral, Marek

Date:

2019

Type:

artykuł w czasopiśmie

Description:

The pyrochlores are the promising low-thermal conductive materials for Thermal Barrier Coatings applications. In present work the concept of pyrochlore formation during APS spraying of ZrO2 and ReO was analyzed. The specially prepared agglomerated mixtures of ZrO2 with Nd2O3, Yb2O3, Er2O3 and Gd2O3 oxides were plasma sprayed using A60 plasma torch on NiCoCrAlY-type bond coat. The influence of plasma gasses composition on coatings’ microstructure was investigated. The results of XRD phase analysis proved formation of pyrochlores from Gd2O3 +ZrO2 and Nd2O3+ZrO2 mixtures. The formation of Er4O12Zr3 from Er2O3+ ZrO2 mixture as well as Zr3Yb4 from Yb2O3+ ZrO2 powder was detected. The presence of pure rare earth oxides (REO) and zirconia oxides was observed in all types of sprayed coatings. The microstructural assessment showed differences in porosity and thickness of obtained ceramic coatings depending of type of REO oxides. The analysis of results showed that it is possible to obtain pyrochlore ceramic coatings from pure oxides mixture. The plasma energy was not efficient for full formation of pyrochlores, therefore the presence of pure oxides was observed.

Place of publishing:

Koszalin

Publisher:

Publishing House of the Koszalin University of Technology

Format:

application/pdf

Identifier:

oai:dlibra.tu.koszalin.pl:1533

Language:

eng

Is part of:

Journal of Mechanical and Energy Engineering. Vol.3 (43), nr 2, s. 141-148

Rights:

Biblioteka Politechniki Koszalińskiej

Access rights:

internet

License:

Creative Commons BY 4.0

Exlibris

Subject and keywords:

thermal barrier coatings plasma spraying ceramic coating rare earth oxides pyrochlores porosity

Object collections:

Last modified:

Nov 6, 2023

In our library since:

Jun 27, 2022

Number of object content hits:

98

All available object's versions:

https://dlibra.tu.koszalin.pl/publication/1537

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Edition name Date
Kubaszek, Tadeusz, 2019, The formation of pyrochlores during plasma spraying of REO and zirconia oxides powder mixture Nov 6, 2023

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