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Atomic-Scale Structural Evolution upon Crystallite Nucleation and Growth in Amorphous Fe78B13Si9
Kiminori Sato,
Hideoki Murakami,
Koichiro Fujimoto,
Masataka Nakata1,
Wolfgang Sprengel2,
Hans-Eckhardt Schaefer3,
Yoshinori Ueji4,
Yoshiyuki Amemiya4, and
Yoshinori Kobayashi5
Department of Environmental Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
1Department of Astronomy and Earth Sciences, Tokyo Gakugei University, Koganei, Tokyo 184-8501, Japan
2Institute of Materials Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria
3Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57/VI, D-70550 Stuttgart, Germany
4Department of Advanced Materials Science, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
5National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
(Received March 31, 2009; accepted June 11, 2009; published online August 20, 2009)
The structural evolution upon nucleation and growth of nanocrystals was investigated for Fe78B13Si9 alloy. Upon the onset of α-Fe nanocrystallization, free volumes dominantly surrounded by Fe atoms are developed in the intergranular amorphous phase. Along with the growth of Fe-based nanocrystallites, free volumes in the intergranular amorphous phase enlarge and Fe atoms in the surroundings of the free volumes get partially replaced by B and Si. The results suggest that nanocrystallization is associated with a local structural relaxation in the metastable intergranular amorphous phase.
URL:
http://jjap.ipap.jp/link?JJAP/48/085505/
DOI: 10.1143/JJAP.48.085505
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