Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions
Two commercial 7-8 wt.% Yttria Stabilised Zirconia (YSZ) suspensions were sprayed by Suspension High Velocity Oxy Fuel (SHVOF) thermal spraying for advanced high temperature coatings. Heat treatments of the free-standing coatings were conducted at 800 °C and 1000 °C for 72 h. The SHVOF coatings usin...
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/47370/ |
| _version_ | 1848797528838897664 |
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| author | Bai, M. Maher, H. Pala, Z. Hussain, Tanvir |
| author_facet | Bai, M. Maher, H. Pala, Z. Hussain, Tanvir |
| author_sort | Bai, M. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Two commercial 7-8 wt.% Yttria Stabilised Zirconia (YSZ) suspensions were sprayed by Suspension High Velocity Oxy Fuel (SHVOF) thermal spraying for advanced high temperature coatings. Heat treatments of the free-standing coatings were conducted at 800 °C and 1000 °C for 72 h. The SHVOF coatings using two liquid carriers: water and ethanol, behaved differently in terms of micro-structure and phase stability. The ethanol coatings retained a fully tetragonal composition after heat treatments; while the aqueous coatings, however, underwent the undesirable tetragonal to monoclinic phase transformation at 1000 °C, which is lower than previously reported temperatures (>1200 °C) in thermal sprayed YSZ coatings. The heat treatments not only resulted in densification of both coatings, but also caused excessive crystallite growth in aqueous coatings promoting the undesirable phase transformation. On the contrary, the ethanol suspension improved the phase stability by favouring the homogenization of yttrium during spraying. |
| first_indexed | 2025-11-14T20:05:19Z |
| format | Article |
| id | nottingham-47370 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:05:19Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-473702020-05-04T19:12:52Z https://eprints.nottingham.ac.uk/47370/ Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions Bai, M. Maher, H. Pala, Z. Hussain, Tanvir Two commercial 7-8 wt.% Yttria Stabilised Zirconia (YSZ) suspensions were sprayed by Suspension High Velocity Oxy Fuel (SHVOF) thermal spraying for advanced high temperature coatings. Heat treatments of the free-standing coatings were conducted at 800 °C and 1000 °C for 72 h. The SHVOF coatings using two liquid carriers: water and ethanol, behaved differently in terms of micro-structure and phase stability. The ethanol coatings retained a fully tetragonal composition after heat treatments; while the aqueous coatings, however, underwent the undesirable tetragonal to monoclinic phase transformation at 1000 °C, which is lower than previously reported temperatures (>1200 °C) in thermal sprayed YSZ coatings. The heat treatments not only resulted in densification of both coatings, but also caused excessive crystallite growth in aqueous coatings promoting the undesirable phase transformation. On the contrary, the ethanol suspension improved the phase stability by favouring the homogenization of yttrium during spraying. Elsevier 2017-10-16 Article PeerReviewed Bai, M., Maher, H., Pala, Z. and Hussain, Tanvir (2017) Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions. Journal of the European Ceramic Society, 38 (4). pp. 1878-1887. ISSN 1873-619X Suspension high velocity oxy fuel (SHVOF); Yttria-stabilized zirconia (YSZ); Suspension medium; Microstructure; Phase stability http://www.sciencedirect.com/science/article/pii/S0955221917307045 doi:10.1016/j.jeurceramsoc.2017.10.026 doi:10.1016/j.jeurceramsoc.2017.10.026 |
| spellingShingle | Suspension high velocity oxy fuel (SHVOF); Yttria-stabilized zirconia (YSZ); Suspension medium; Microstructure; Phase stability Bai, M. Maher, H. Pala, Z. Hussain, Tanvir Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title | Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title_full | Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title_fullStr | Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title_full_unstemmed | Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title_short | Microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| title_sort | microstructure and phase stability of suspension high velocity oxy-fuel sprayed yttria stabilised zirconia coatings from aqueous and ethanol based suspensions |
| topic | Suspension high velocity oxy fuel (SHVOF); Yttria-stabilized zirconia (YSZ); Suspension medium; Microstructure; Phase stability |
| url | https://eprints.nottingham.ac.uk/47370/ https://eprints.nottingham.ac.uk/47370/ https://eprints.nottingham.ac.uk/47370/ |