Thermogravimetric investigations of new γ-γ′ cobalt-based superalloys
| Autor: | Marta Mikuśkiewicz, Damian Migas, Tomasz Maciąg, Grzegorz Moskal |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Thermogravimetric analysis Materials science Scanning electron microscope Alloy Analytical chemistry Energy-dispersive X-ray spectroscopy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Isothermal process Thermogravimetry Superalloy chemistry 0103 physical sciences engineering Physical and Theoretical Chemistry 0210 nano-technology Cobalt |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 134:119-125 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-018-7420-7 |
| Popis: | The aim of the study is characterization of high-temperature oxidation behavior of new Co-based superalloys by thermogravimetry (TG). The following alloys have been taken into account: Co–9Al–9W, Co–20–Ni–7Al–7W, Co–10Al–5Mo–2Nb and Co–20Ni–10Al–5Mo–2Nb (at.%). The thermogravimetric analysis was carried out in the temperature range 40–1200 °C of heating rate 5° min−1. The investigation was performed using the thermal analyzer NETZSCH STA 449 F3 Jupiter. TG–DTG plots showed oxidation behavior up to 1200 °C and indicated the temperatures of further isothermal oxidation examinations. The oxidation behavior of basic Co–9Al–9W (at.%) alloy was compared to W-free Co–10Al–5Mo–2Nb and Co–20Ni–10Al–5Mo–2Nb (at.%) alloys. The obtained data showed different oxidation behavior dependably on the type of alloying elements. Moreover, the effect of Ni addition on oxidation performance was determined. The scales grown on Co-base superalloys after thermogravimetry were evaluated by means of scanning electron microscopy and energy dispersive spectroscopy. |
| Databáze: | OpenAIRE |
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