Magnetization and structure of Fe-Al powders.

• Autorzy: Fujii, M. , Saito, K. , Wakayama, K. , Kawasaki, M. , Yoshioka, T. , Isshiki, T. , Nishio, K. , Shiojiri, M.
• Konferencja: XV Physical Metallurgy and Materials Science Conference on Advanced Materials & Technologies AMT'98, Kraków-Krynica, Poland, 17-21 May, 1998
• Języki publikacji: EN

Abstrakty

EN

A few micrometers-sized Fe1-xAlx (x=0.35-0.42) powders prepared by atomizing method have the B2 structure and are paramegnetic. The powder milled for several hours is magnetized and has a spontaneous magnetization as great as 100 emu/g. The milled powder particles become flakes, which are composed of lamellae expanding parallel to the (110) plane and having heavily distorted lattice. High-resolution transmission electron microscopy and electron diffraction revealed that structures appear in very thin areas within the lamellae. These superlattices indicate the creation of large number of antiphase boundaries, which induce ferromagnetism. When the milled powder is heated at 100-400 degrees centigrade the magnetization decreases to a few tens emu/g, the lamella structures being kept.

Słowa kluczowe

PL

magnetyzacja; żelazo; aluminium; stop; ferromagnetyzm; proszek rozpylany; sieć krystaliczna; mikroskopia elektronowa

EN

magnetization; iron; aluminium; alloy; ferromagnetism; atomized powder; lattice; electron microscopy

• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 860-863
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Fujii, M.

• Materials Research Center, TDK Co., Narita, Japan

autor

Saito, K.

• Materials Research Center, TDK Co., Narita, Japan

autor

Wakayama, K.

• Materials Research Center, TDK Co., Narita, Japan

autor

Kawasaki, M.

• JEOL Co. Ltd.

autor

Yoshioka, T.

• JEOL High-Tech Inc., Akishima, Japan

autor

Isshiki, T.

• Kyoto Institute of Technology, Kyoto, Japan

autor

Nishio, K.

• Kyoto Institute of Technology, Kyoto, Japan

autor

Shiojiri, M.

• Kyoto Institute of Technology, Kyoto, Japan

• TDK Co., Materials Research Center, Narita

Bibliografia

• [1] A.Taylor and R. M. Jones, J. Phys. Chem. Solids 6, (1958) 16.
• [2] G. P. Hoffman and R. M. Fisher, J. Appl. Phys. 38, (1967) 735.
• [3] M.J. Besnus, A. Herr and A.J.P. Meyer, J. Phys. F: Metal Phys. 5, (1975) 2138.
• [4] T. Yoshioka, M. Kawasaki, M. Kitano, K. Nishio and M. Shiojiri, J. Electron Microsc. 44, (1995) 489.
• [5] L. S. Palatnik, I. A. Tananko and J. Bobro, Kristallografiya 9, (1964) 209.