Hot corrosion of Mg2SiO4 ceramics exposed to V2O5 at temperatures of 700–1050 °C in air
| Autor: | Si Chen, Wenjia Song, Xueqiang Cao, Jieyan Yuan, Xin Zhou, Shujuan Dong, Hao Zhang, Xiong Zhou, Yunwei Tu |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020209 energy General Chemical Engineering Metallurgy Reaction zone 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Corrosion Thermal barrier coating Infiltration (hydrology) visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Degradation (geology) General Materials Science Ceramic 0210 nano-technology Porosity Layer (electronics) |
| Zdroj: | Corrosion Science. 159:108114 |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2019.108114 |
| Popis: | The hot corrosion behavior of Mg2SiO4 ceramic was investigated in molten V2O5 at 700–1050 °C. Mg2V2O7 and SiO2 were the main corrosion products which were almost temperature independent. The corrosion layer consisted of two zones. The planar reaction zone (PRZ) was very thin due to the chemical inertness of Mg2SiO4 with V2O5, while the infiltrated reaction zone (MIRZ) was thick due to the high porosity of the ceramic. The depth of MIRZ increased rapidly with the increase of temperature, indicating that thermo-mechanical damage caused by V2O5 infiltration might be the main degradation mechanism of the Mg2SiO4 based thermal barrier coatings. |
| Databáze: | OpenAIRE |
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