Kinetics of oxide scale growth on a (Ti, Mo)5Si3 based oxidation resistant Mo-Ti-Si alloy at 900-1300∘C
| Autor: | Ajoy Kumar Pandey, G.V.S. Nageswara Rao, Sanjib Majumdar, Pankaj Kumar Singh |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Technology
Materials science oxidation Kinetics Oxidation resistant Alloy 0211 other engineering and technologies Oxide Chemicals: Manufacture use etc 02 engineering and technology Activation energy TP1-1185 engineering.material chemistry.chemical_compound General Materials Science Physical and Theoretical Chemistry 021102 mining & metallurgy Materials processing oxide scale Chemical technology high-temperature TP200-248 021001 nanoscience & nanotechnology Condensed Matter Physics chemistry activation energy Mechanics of Materials kinetics engineering 0210 nano-technology Nuclear chemistry |
| Zdroj: | High Temperature Materials and Processes, Vol 38, Iss 2019, Pp 533-540 (2019) |
| ISSN: | 2191-0324 0334-6455 |
| Popis: | High-temperature oxidation behaviour of Mo-40Ti-30Si (at.%) alloy was investigated in the temperature regime of 900-1300∘C in air. Isothermal weight change data recorded up to 100 h of exposure revealed parabolic weight gain kinetics at all the tested temperatures. The protective oxide scale composed with SiO2 (silica) and TiO2 (titania) forming a duplex oxide microstructure consisting of TiO2 particles embedded in the continuous SiO2 matrix. The oxide scale showed parabolic growth kinetics, and the activation energies for the scale growth were found to be 72.2 kJ/mol in 900-1200∘C and 324.9 kJ/mol in 1200-1300∘C. The kinetics of the protective scale growth on the alloy surface was mainly controlled by the growth of the silica film and the inward diffusion of oxygen through the duplex oxide layer. |
| Databáze: | OpenAIRE |
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