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Fr aktalne własności separacji faz BCC / FCC w stopach Fe-Au

Fr aktalne własności separacji faz BCC / FCC w stopach Fe-Au A. Błachowski 1 , K. Ruebenbauer 1 , A. Rakowska 2,3 1 Zakład Spektroskopii M ö ssbauer owskiej , Instytut Fizyki , Akademia Pedagogiczna , Kraków 2 Wydział Inżynierii Materiałowej i Ceramiki ,

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Fr aktalne własności separacji faz BCC / FCC w stopach Fe-Au

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  1. Fraktalne własności separacji faz BCC/FCC w stopach Fe-Au A. Błachowski 1, K. Ruebenbauer 1, A. Rakowska 2,3 1Zakład Spektroskopii Mössbauerowskiej, Instytut Fizyki, Akademia Pedagogiczna, Kraków 2Wydział Inżynierii Materiałowej i Ceramiki, Akademia Górniczo-Hutnicza, Kraków 3Instytut Metalurgii i Inżynierii Materiałowej, Polska Akademia Nauk, Kraków

  2. Fe-Au Phase Diagram FCC–Au(Fe) BCC–Fe(Au) . . Fe70Au30andFe50Au50 as-castandannealed 250ºC/24h + 500ºC/48h

  3. Mössbauer spectroscopy as-castannealed Fe70Au30 Fe50Au50 BCC–Fe(Au) FCC–Au(Fe) as-cast3 at.% Au 33 at.% Fe annealed~0 at.% Au 23 at.% Fe Nanoparticles of FCC-Au(Fe) and BCC-Fe(Au) phases with diameter ~50 nm Ultra high-resolution scanning electron microscope SEM-FEG + EDS (Nova 200 NanoSEM)

  4. Fe70Au30 as-cast EDS results (1 μmscale) 14 at.% Au in dark regionsand45 at.% Au in bright regions

  5. Fe50Au50 annealed EDS results (1 μmscale) 19 at.% Au in dark regionsand75 at.% Au in bright regions

  6. Roughness method Images were pixelized with L= 8 bits per pixel, N= 2048 pixels vertical, M= 2375 pixels horizontal. r - pixel edge size fractal dimension diffusion limited aggregation (DLA)fractal d = 1.71

  7. Conclusions – self-similarity 500 μm 500 nm – fractal dimension similar to (hydrodynamic) DLA fractal

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