Journal article
Microstructural, mechanical and tribological properties of nanostructured YSZ coatings produced with different APS process parameters
Ceramics international, Vol.41(7), pp.8904-8914
08/2015
DOI: 10.1016/j.ceramint.2015.03.148
Abstract
Plasma sprayed ceramic coatings can be used in turbine engines as thermal barrier or abradable coatings, in order to improve the durability of the components as well as the efficiency. The presence of nanostructures, deriving from partial melting of agglomerated nanostructured particles, represents an interesting technological solution in order to improve their functional characteristics. In this work nanostructured yttria stabilized zirconia (YSZ) coatings were deposited by air plasma spraying (APS). The influence of the main process parameters on their microstructural, mechanical and tribological properties was investigated by scanning electron microscopy (SEM), indentation techniques at micro- and nano-scale and wear tests, respectively. Their porous microstructure was composed of well melted overlapped splats and partially melted nanostructured areas. This bimodal microstructure led to a bimodal distribution of the mechanical properties. An increase of plasma power and spraying distance was able to produce denser coatings, with lower content of embedded nanostructures, which exhibited higher elastic modulus and hardness as well as lower wear rate.
Details
- Title: Subtitle
- Microstructural, mechanical and tribological properties of nanostructured YSZ coatings produced with different APS process parameters
- Creators
- C Lamuta - Department of Mechanical Engineering, University of Calabria, Ponte P. Bucci, Cubo 44C, Rende, ItalyG Di Girolamo - ENEA, Materials Technology Unit, Casaccia Research Centre, Rome, ItalyL Pagnotta - Department of Mechanical Engineering, University of Calabria, Ponte P. Bucci, Cubo 44C, Rende, Italy
- Resource Type
- Journal article
- Publication Details
- Ceramics international, Vol.41(7), pp.8904-8914
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.ceramint.2015.03.148
- ISSN
- 0272-8842
- eISSN
- 1873-3956
- Language
- English
- Date published
- 08/2015
- Academic Unit
- Mechanical Engineering
- Record Identifier
- 9984064570102771
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