Hot corrosion characteristics of SrCeO3 as thermal barrier coating material
This study investigates the thermal barrier and hot corrosion characteristics of SrCeO3, a perovskite-structured material, synthesized via the solid-state method using SrCO3 and CeO2 as precursors. The crystal structure was confirmed by x-ray diffraction (XRD), and the elemental composition matched...
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Elsevier
2025-07-01
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| Series: | Next Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S294982282500125X |
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| author | Sachin Raj P.V. Kumaresh Babu S.P. Saravana Kumar P. Dhayalan R. |
| author_facet | Sachin Raj P.V. Kumaresh Babu S.P. Saravana Kumar P. Dhayalan R. |
| author_sort | Sachin Raj P.V. |
| collection | DOAJ |
| description | This study investigates the thermal barrier and hot corrosion characteristics of SrCeO3, a perovskite-structured material, synthesized via the solid-state method using SrCO3 and CeO2 as precursors. The crystal structure was confirmed by x-ray diffraction (XRD), and the elemental composition matched theoretical values based on energy-dispersive spectroscopy (EDS). Thermal analysis showed that SrCeO3 is phase stable up to 1400ºC, with thermal conductivity lower than that of yttria-stabilized zirconia (YSZ), though the coefficient of thermal expansion was similar. Mechanical properties, including elasticity, hardness, and fracture toughness, were found to be inferior to those of YSZ. Additionally, SrCeO3 showed incompatibility with thermally grown oxide (TGO) layers, reacting with Al2O3 at high temperatures. Atmospheric plasma sprayed coatings of SrCeO3 showed minimal decomposition, with only trace amounts of Sr(OH)2 and CeO2 formed during spraying. The high-temperature corrosion behavior of SrCeO3 was examined in a 32 wt% Na2SO4 + 68 wt% V2O5 salt mixture and pure V2O5 at 900ºC for 30 h. In the salt mixture, Sr3V2O8 was the primary corrosion product, whereas SrV2O6 formed in pure V2O5. The Na2SO4 in the salt mixture increased the corrosive activity by enhancing V2O₅ reactivity. Importantly, no Ce-V-O corrosion product was observed, confirming that corrosion followed the Lewis acid-base principle. |
| format | Article |
| id | doaj-art-73153ce27b3b4e10a456dfeb890258b2 |
| institution | DOAJ |
| issn | 2949-8228 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Next Materials |
| spelling | doaj-art-73153ce27b3b4e10a456dfeb890258b22025-08-20T02:41:39ZengElsevierNext Materials2949-82282025-07-01810060710.1016/j.nxmate.2025.100607Hot corrosion characteristics of SrCeO3 as thermal barrier coating materialSachin Raj P.V.0Kumaresh Babu S.P.1Saravana Kumar P.2Dhayalan R.3Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620015, India; Correspondence to: Department of Metallurgical and Materials Engineering, NIT, Trichy 620015, India.Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620015, IndiaDepartment of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli 620015, IndiaNon-Destructive Evaluation Division, Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Chengalpattu, Tamil Nadu 603102, IndiaThis study investigates the thermal barrier and hot corrosion characteristics of SrCeO3, a perovskite-structured material, synthesized via the solid-state method using SrCO3 and CeO2 as precursors. The crystal structure was confirmed by x-ray diffraction (XRD), and the elemental composition matched theoretical values based on energy-dispersive spectroscopy (EDS). Thermal analysis showed that SrCeO3 is phase stable up to 1400ºC, with thermal conductivity lower than that of yttria-stabilized zirconia (YSZ), though the coefficient of thermal expansion was similar. Mechanical properties, including elasticity, hardness, and fracture toughness, were found to be inferior to those of YSZ. Additionally, SrCeO3 showed incompatibility with thermally grown oxide (TGO) layers, reacting with Al2O3 at high temperatures. Atmospheric plasma sprayed coatings of SrCeO3 showed minimal decomposition, with only trace amounts of Sr(OH)2 and CeO2 formed during spraying. The high-temperature corrosion behavior of SrCeO3 was examined in a 32 wt% Na2SO4 + 68 wt% V2O5 salt mixture and pure V2O5 at 900ºC for 30 h. In the salt mixture, Sr3V2O8 was the primary corrosion product, whereas SrV2O6 formed in pure V2O5. The Na2SO4 in the salt mixture increased the corrosive activity by enhancing V2O₅ reactivity. Importantly, no Ce-V-O corrosion product was observed, confirming that corrosion followed the Lewis acid-base principle.http://www.sciencedirect.com/science/article/pii/S294982282500125XThermal barrier coatingHot corrosionPerovskitesSulfate-vanadate corrosion |
| spellingShingle | Sachin Raj P.V. Kumaresh Babu S.P. Saravana Kumar P. Dhayalan R. Hot corrosion characteristics of SrCeO3 as thermal barrier coating material Next Materials Thermal barrier coating Hot corrosion Perovskites Sulfate-vanadate corrosion |
| title | Hot corrosion characteristics of SrCeO3 as thermal barrier coating material |
| title_full | Hot corrosion characteristics of SrCeO3 as thermal barrier coating material |
| title_fullStr | Hot corrosion characteristics of SrCeO3 as thermal barrier coating material |
| title_full_unstemmed | Hot corrosion characteristics of SrCeO3 as thermal barrier coating material |
| title_short | Hot corrosion characteristics of SrCeO3 as thermal barrier coating material |
| title_sort | hot corrosion characteristics of srceo3 as thermal barrier coating material |
| topic | Thermal barrier coating Hot corrosion Perovskites Sulfate-vanadate corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S294982282500125X |
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