TY - JOUR
T1 - Microstructural evolution of intermetallic compound layers formed in Fe/Zn binary diffusion couples
AU - Kainuma, Ryosuke
AU - Ishida, Kiyohito
PY - 2005/2
Y1 - 2005/2
N2 - The microstructural evolution of intermetallic compound layers formed in Fe/Zn diffusion couples (DCs) was examined by optical and scanning electron microscopies and electron-probe microanalysis. In the solid-Fe/liquid-Zn DCs at 450°C, the δp phase nucleates between the δp and ζ phases after dipping for about 100 s and every intermediate phase seems to obey the square root law individually before and after the appearance of the δp phase at 100 s. In the concentration-penetration profiles, a composition gap is observed in the δp phase of the solid-Fe/liquid-Zn DCs dipped for a long time at temperatures ranging from 450 to 550°C, while only a singular point, but no gap, is obtained in the DCs dipped at elevated temperatures over 575°C. On the other hand, in the case of the solid-Fe/solid-Zn DCs at 400°C, the δk phase instead of the δp phase appeares later between the δp and Γ phases and finally covers the whole δ region.
AB - The microstructural evolution of intermetallic compound layers formed in Fe/Zn diffusion couples (DCs) was examined by optical and scanning electron microscopies and electron-probe microanalysis. In the solid-Fe/liquid-Zn DCs at 450°C, the δp phase nucleates between the δp and ζ phases after dipping for about 100 s and every intermediate phase seems to obey the square root law individually before and after the appearance of the δp phase at 100 s. In the concentration-penetration profiles, a composition gap is observed in the δp phase of the solid-Fe/liquid-Zn DCs dipped for a long time at temperatures ranging from 450 to 550°C, while only a singular point, but no gap, is obtained in the DCs dipped at elevated temperatures over 575°C. On the other hand, in the case of the solid-Fe/solid-Zn DCs at 400°C, the δk phase instead of the δp phase appeares later between the δp and Γ phases and finally covers the whole δ region.
KW - Diffusion couple
KW - Fe-Zn intermetallic compounds
KW - Interfacial reaction
KW - Layer growth
KW - Phase diagram
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U2 - 10.2355/tetsutohagane1955.91.3_349
DO - 10.2355/tetsutohagane1955.91.3_349
M3 - Article
AN - SCOPUS:18344391481
SN - 0021-1575
VL - 91
SP - 349
EP - 355
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
IS - 3
ER -