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HOLZ Rings in EBSD Patterns of the UFeB4 Compound: Association with a Random Distribution of Planar Defects

Published online by Cambridge University Press:  17 September 2013

Marta Dias ,
Patrícia Almeida Carvalho ,
Isabel Cordeiro dos Santos ,
Olivier Tougait ,
Ladislav Havela  and
António Pereira Gonçalves
Marta Dias*
Affiliation:
IST/ITN, Instituto Superior Técnico, University of Lisbon, Estrada Nacional 10, 2686-953 Sacavém, Portugal ICEMS, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Patrícia Almeida Carvalho
Affiliation:
ICEMS, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Isabel Cordeiro dos Santos
Affiliation:
IST/ITN, Instituto Superior Técnico, University of Lisbon, Estrada Nacional 10, 2686-953 Sacavém, Portugal
Olivier Tougait
Affiliation:
Institut des Sciences Chimiques de Rennes, Chemie du Solide et Matériaux, UMR CNRS 6226, Université de Rennes 1, Avenue de Général Leclerc, 35042 Rennes, France
Ladislav Havela
Affiliation:
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
António Pereira Gonçalves
Affiliation:
IST/ITN, Instituto Superior Técnico, University of Lisbon, Estrada Nacional 10, 2686-953 Sacavém, Portugal
*
*Corresponding author. E-mail: [email protected]
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Abstract

The UFeB4 phase present in different alloys of the B–Fe–U system was studied by powder X-ray diffraction (PXRD) and scanning electron microscopy complemented with energy-dispersive spectroscopy and electron backscattered diffraction (EBSD). The PXRD data showed that the ternary compound crystallized adopting essentially the YCrB4-type structure. However, microstructural observations revealed that under high undercooling conditions the UFeB4 phase exhibits a random distribution of defects parallel to, which are consistently associated with intense higher-order Laue zone rings in EBSD patterns. Indexation of the EBSD patterns showed that the defective structure is compatible with an intergrowth of YCrB4- and ThMoB4-type layers according to the (010)YCrB4//(110)ThMoB4 and [001]YCrB4//[001]ThMoB4 orientation relation previously reported for an analogous compound. Magnetic studies indicated that the annealed UFeB4 compound has a paramagnetic behavior in the 2–300 K temperature range.

Keywords

EBSD patternsHOLZ ringsternary borideplanar defectsrandom intergrowthparamagnetic compound
Type
Portuguese Society for Microscopy
Information
Microscopy and Microanalysis , Volume 19 , Issue 5 , October 2013 , pp. 1204 - 1210
Copyright
Copyright © Microscopy Society of America 2013 

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References

Boudias, C. & Monceau, D. (1989–2005). Carine crystallography software package. Available at http://carine.crystallography.pagespro-orange.fr/.Google Scholar
Dias, M., Carvalho, P.A., Dias, A.P., Bonh, M., Franco, N., Tougait, O., Noël, H. & Gonçalves, A.P. (2010). Cascade of peritectic reactions in the B-Fe-U system. J Phase Equilib Diffus 31(2), 104–112.CrossRefGoogle Scholar
Dias, M., Carvalho, P.A., Mardolcar, U.V., Tougait, O., Noël, H. & Gonçalves, A.P. (2013a). Liquidus projection of the B-Fe-U diagram: The boron-rich corner. Metall Mater Trans A 44(1), 395–405.CrossRefGoogle Scholar
Dias, M., Carvalho, P.A., Mardolcar, U.V., Tougait, O., Noël, H. & Gonçalves, A.P. (2013b). Liquidus projection of the B-Fe-U diagram: The Fe-rich corner. Metall Mater Trans A 44(5), 2270–2284.CrossRefGoogle Scholar
Dias, M., Carvalho, P.A., Sologub, O., Pereira, L.C.J., Santos, I.C. & Gonçalves, A.P. (2009). Studies on the new UFe2B6 phase. J Alloys Compd 492(1-2), L13–L15.CrossRefGoogle Scholar
Dias, M., Carvalho, P.A., Sologub, O., Tougait, O., Noël, H., Godart, C., Leroy, E. & Gonçalves, A.P. (2007). Isothermal section at 950°C of the U-Fe-B ternary system. Intermetall 15, 413–418.Google Scholar
Galatanu, A., Yamamoto, E., Yoshinori, H. & Yoshichika, O. (2006). Magnetic behavior of UB4 at high temperatures. Phys B 378–380, 999–1000.CrossRefGoogle Scholar
Gonçalves, A.P. & Noël, H. (2005). Isothermal section at 850°C of the U-Fe-Al ternary system. Intermetallics 13, 580–585.CrossRefGoogle Scholar
Joy, D.C., Newbury, D.E. & Davidson, D.L. (1982). Electron channeling patterns in the scanning electron microscope. J Appl Phys 53(8), R81–R122.CrossRefGoogle Scholar
Kuzma, Y.B. & Chaban, N.F. (1990). Binary and Ternary Systems Containing Boron, Moscow, Metallurgy (in Russian).Google Scholar
Michael, J.R. & Eades, J.A. (2000). Use of reciprocal lattice layer spacing electron backscatter diffraction pattern analysis. Ultramicroscopy 81, 67–81.CrossRefGoogle ScholarPubMed
Noël, H. & Gonçalves, A.P. (2001). Isothermal section at 750°C of the U-Fe-Sn ternary system. Intermetallics 9, 473–479.CrossRefGoogle Scholar
Nozle, G. & Kraus, W. (1999). Powder Cell for Windows Version 2.2. Berlin, Germany: Federal Institute for Materials Research and Testing.Google Scholar
Oxford Instruments HKL (2007). The HKL Channel 5 software. Available at http://www.oxinst.eu/products/microanalysis/ebsd/ebsd-acquisitionsoftware/Pages/channel5.aspx.Google Scholar
Sechovsky, V. & Havela, L. (1992). Anisotropic hybridization and magnetism in actinide intermetallics. Phys Scr T45, 99–102.CrossRefGoogle Scholar
Sobczak, R. & Rogl, P. (1979). Magnetic behavior of new ternary metal borides with YCrB4-type structure. J Solid State Chem 27, 343–348.Google Scholar
Valyovka, I.P. & Kuzma, Y.B. (1974). Dopovidi Akademii Nauk Ukrainskoi RSR. A: Fiz.-Tekhn. Mat Nauki 1029.Google Scholar
Valyovka, I.P. & Kuzma, Y.B. (1975). Dopovidi Akademii Nauk Ukrainskoi RSR. A: Fiz.-Tekhn. Mat. Nauki 652.Google Scholar
Villars, E. & Calvert, L.D. (1991). Pearson's Handbook of Crystallographic Data for Intermetallic Phases. Materials Park, OH: ASM International.Google Scholar
Winkelmann, A. (2000). Dynamical simulation of electron backscatter diffraction patterns. In Electron Backscatter Diffraction in Materials Science, Schwartz, A.J. & Kumar, M. (Eds.), p. 27. New York: Springer.Google Scholar
Yubuta, K., Mori, T., Leithe-Jasper, A., Grin, Y., Okada, S. & Shishido, T. (2009). Direct observation of the intergrowth α–phase in β-TmAlB4 via high-resolution electron microscopy. Mater Res Bull 44, 1743–1746.CrossRefGoogle Scholar