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Local structure and magnetic properties of Fe60Co40 mechanical alloy

Dong-Seok Yang1, Seok-Ho Kim1, Yong-Goo Yoo2 and Seong-Cho Yu3

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Fe60Co40 alloys were fabricated by the mechanical alloying process with the periods of 1, 2, 4, 6, 12 and 24 hours, respectively. The structural variations during the formation of the alloy were examined by the X-ray diffraction and the extended X-ray absorption fine structure. The activation for structural transform begins in 6 hour milling. Substantial structural changes were observed in 12 hour milling. The alloying process was almost completed in 24 hours. EXAFS analysis showed that BCC shells appeared in the alloy milled for 6 hours. The magnetization increased as milling time increased.


PACS

61.66.Dk Alloys

81.30.Hd Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder

64.70.K- Solid–solid transitions

75.50.Bb Fe and its alloys

78.70.Dm X-ray absorption spectra

81.20.Ev Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 1 (2009)



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