Structural change of amorphous Fe90Zr7B3 alloy in the primary crystallization process studied by modern electron microscope techniques

作者: T Ohkubo , H Kai , A Makino , Y Hirotsu

DOI: 10.1016/S0921-5093(00)01870-0

关键词:

摘要: Abstract Structural changes in the primary crystallization process of amorphous Fe 90 Zr 7 B 3 alloy have been investigated using modern electron microscope techniques. In as-quenched specimen, bcc–Fe clusters as small 1 nm were observed by high resolution microscopy (HREM). Nanoprobe energy dispersive X-ray spectroscopy revealed a development Zr-enriched zones beside α-Fe nanocrystals initial stage at 733 K. Besides nanocrystals, 2 and Zr-type nanoprecipitates identified nanodiffraction HREM after annealing 923 Electron diffraction pair distribution function (PDF) analysis performed for annealed specimens. The PDF matrix combined with reverse-Monte-Carlo simulation that bcc-like are formed already state. coordination number Zr–Fe distance short-range order (SRO) structures around atoms both decreased on towards formation local resembling structure units or phases. results strongly suggest polymorphic reaction from regions to stage. Zr-like SROs is thought stabilize structure, contributes suppress growth optimized good soft-magnetic property.

参考文章(22)
M. Miglierini, Y. Labaye, N. Randrianantoandro, J.-M. Grenéche, Mössbauer effect study of amorphous-crystalline interface in annealed FeCuZrB Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. pp. 559- 564 ,(1997) , 10.1016/S0921-5093(96)10685-7
T. Ohkubo, H. Kai, Y. Hirotsu, Structural modeling of Pd–Si and Fe–Zr–B amorphous alloys based on the microphase separation model Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 304, pp. 300- 304 ,(2001) , 10.1016/S0921-5093(00)01436-2
Y. Zhang, K. Hono, A. Inoue, A. Makino, T. Sakurai, Nanocrystalline structural evolution in Fe90Zr7B3 soft magnetic material Acta Materialia. ,vol. 44, pp. 1497- 1510 ,(1996) , 10.1016/1359-6454(95)00277-4
Jean Marie Dubois, Gérard Le Caer, Mössbauer study of Fe1 − xBx amorphous alloys: A model of the atomic structure Nuclear Instruments and Methods in Physics Research. ,vol. 199, pp. 307- 314 ,(1982) , 10.1016/0167-5087(82)90221-6
K. Tsuno, T. Kaneyama, T. Honda, K. Tsuda, M. Terauchi, M. Tanaka, DESIGN AND TESTING OF OMEGA MODE IMAGING ENERGY FILTERS AT 200 KV Journal of Electron Microscopy. ,vol. 46, pp. 357- 368 ,(1997) , 10.1093/OXFORDJOURNALS.JMICRO.A023531
R. L. McGreevy, L. Pusztai, Reverse Monte Carlo Simulation: A New Technique for the Determination of Disordered Structures Molecular Simulation. ,vol. 1, pp. 359- 367 ,(1988) , 10.1080/08927028808080958
Hikaru Terauchi, Satoshi Iida, Kazuhiro Tanabe, Hironobu Maeda, Moritaka Hida, Nagao Kamijo, Kozo Osamura, Masaaki Takashige, Terutaro Nakamura, Heterogeneous Structure of Amorphous Materials Journal of the Physical Society of Japan. ,vol. 52, pp. 3454- 3459 ,(1983) , 10.1143/JPSJ.52.3454
O.L. Krivanek, P.E. Mooney, Applications of slow-scan CCD cameras in transmission electron microscopy Ultramicroscopy. ,vol. 49, pp. 95- 108 ,(1993) , 10.1016/0304-3991(93)90216-K