کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620564 | 988637 | 2011 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral evidence of spinodal decomposition, phase transformation and molecular nitrogen formation in supersaturated TiAlN films upon annealing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Spectral evidence of spinodal decomposition, phase transformation and molecular nitrogen formation in supersaturated TiAlN films upon annealing Spectral evidence of spinodal decomposition, phase transformation and molecular nitrogen formation in supersaturated TiAlN films upon annealing](/preview/png/10620564.png)
چکیده انگلیسی
Thermal treatment of supersaturated Ti1âxAlxN films (x â 0.67) with a dominant ternary cubic-phase were performed in the 700-1000 °C range. Grazing incidence X-ray diffraction (GIXRD) shows that, for annealing temperatures up to 800 °C, the film structure undergoes the formation of coherent cubic AlN (c-AlN) and TiN (c-TiN) nanocrystallites via spinodal decomposition and, at higher temperatures (⩾900 °C), GIXRD shows that the c-AlN phase transforms into the thermodynamically more stable hexagonal AlN (h-AlN). X-ray absorption near-edge structure (XANES) at the Ti K-edge is consistent with spinodal decomposition taking place at 800 °C, while Al K-edge and N K-edge XANES and X-ray emission data show the nucleation of the h-AlN phase at temperatures >800 °C, in agreement with the two-step decomposition process for rock-salt structured TiAlN, which was also supported by X-ray diffraction patterns and first-principle calculations. Further, the resonant inelastic X-ray scattering technique near the N K-edge revealed that N2 is formed as a consequence of the phase transformation process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 59, Issue 16, September 2011, Pages 6287-6296
Journal: Acta Materialia - Volume 59, Issue 16, September 2011, Pages 6287-6296
نویسندگان
J.L. Endrino, C. Ã
rhammar, A. Gutiérrez, R. Gago, D. Horwat, L. Soriano, G. Fox-Rabinovich, D. MartÃn y Marero, J. Guo, J.-E. Rubensson, J. Andersson,