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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 6    December 2006

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Magnetic properties of nanostructural γ-Ni-28Fe alloy
LIU Yin(刘 银)1, 2, QIN Xiao-ying(秦晓英)3, QIU Tai(丘 泰)1

1. School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China; 
2. Department of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; 
3. Institute of Solid State Physics, Chinese Academy of Science, Hefei 230031, China

Abstract: Nanostructural γ-Ni-28Fe alloy (nano γ-Ni-28Fe) was successfully prepared by mechanochemical alloying(MCA). The relationship between the microstructure and the synthesis conditions was investigated by using XRD, TEM, SEM as well as BET analyzer. The results show that nano γ-Ni-28Fe alloy is composed of a gamma phase (FCC structure). Its grain size is about 20 nm at reduction temperature below 600 ℃. The magnetic measurements indicate that the saturation magnetization of nano γ-Ni-28Fe alloy is 102.4 A·m2/kg, and the coercivity is much higher than that of conventional coarse-grained counterpart. The result may be attributed to its decrease of the grain size and chemical composition in nano γ-Ni-28Fe alloy.

 

Key words: nanostructural material; Ni-28Fe alloy; mechanochemical alloying; microstructure; magnetic property

ISSN 1672-7029
CN 43-1423/U

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