التفاصيل البيبلوغرافية
| العنوان: |
Microstructural study of the NbC to G-phase transformation in HP-Nb alloys |
| المؤلفون: |
Vaché, N., Steyer, P., Duret-Thual, Claude, Perez, M., Douillard, T., Rauch, E., Véron, M., Renou, G., Dupoiron, F., Augustin, C., Cazottes, S. |
| المصدر: |
Materialia. 9 |
| مصطلحات موضوعية: |
Advanced material characterization, Ageing, G-phase, HP-Nb alloy, Microstructure, NbC, Carbides, Chromium compounds, Diffusion, Ion beams, Nickel compounds, Niobium compounds, Scanning electron microscopy, Silicon compounds, Titanium carbide, Transmission electron microscopy, Advanced materials, Carbide precipitate, Complex microstructures, Multi-scale approaches, Nb alloys, Scanning and transmission electron microscopy, Niobium alloys |
| الوصف: |
The microstructure of a centrifugally cast HP alloy was studied in its as-received state and after ageing at 900 °C. A multi-scale approach combining X Ray Diffraction (XRD), advanced electron microscopy modes (scanning and transmission electron microscopies (SEM, TEM), together with focused ion beam/SEM nanotomography (FIB-nt)) has been carried out to characterize the evolution of niobium carbides during ageing. After thermal treatment, the carbides exhibit a complex microstructure, consisting of a core of untransformed NbC, an intermediate layer of G-phase (Ni16Nb6Si7) with embedded nanometric titanium carbide precipitates, and an outer shell of alternating chromium carbides Cr23C6 and G-phase. A simple diffusion model was used to explain the faster external growth of G-phase compared to the internal NbC dissolution, and to determine a diffusion coefficient of niobium in the G-phase at 900 °C. |
| وصف الملف: |
print |
| URL الوصول: |
https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-50114 |
| قاعدة البيانات: |
SwePub |