Nano Archive

Nanostructured Hypoeutectic Fe-B Alloy Prepared by a Self-propagating High Temperature Synthesis Combining a Rapid Cooling Technique

Fu, Licai and Yang, Jun and Bi, Qinling and Liu, Weimin (2009) Nanostructured Hypoeutectic Fe-B Alloy Prepared by a Self-propagating High Temperature Synthesis Combining a Rapid Cooling Technique. Nanoscale Research Letters, 4 (1). pp. 11-16. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.springerlink.com/content/p8u31v07n03248...

Abstract

We have successfully synthesized bulk nanostructured Fe94.3B5.7 alloy using the one-step approach of a self-propagating high temperature synthesis (SHS) combining a rapid cooling technique. This method is convenient, low in cost, and capable of being scaled up for processing the bulk nanostructured materials. The solidification microstructure is composed of a relatively coarse, uniformly distributed dendriteto a nanostructured eutectic matrix with α-Fe(B) and t-Fe2B phases. The fine eutectic structure is disorganized, and the precipitation Fe2B is found in the α-Fe(B) phase of the eutectic. The dendrite phase has the t-Fe2B structure rather than α-Fe(B) in the Fe94.3B5.7 alloy, because the growth velocity of t-Fe2B is faster than that of the α-Fe with the deeply super-cooling degree. The coercivity (Hc) and saturation magnetization (Ms) values of the Fe94.3B5.7 alloy are 11 A/m and 1.74T, respectively. Moreover, the Fe94.3B5.7 alloy yields at 1430 MPa and fractures at 1710 MPa with a large ductility of 19.8% at compressive test.

Item Type:Article
Uncontrolled Keywords:Nanostructured eutectic - Fe94.3B5.7 alloy - Self-propagating high temperature synthesis (SHS) - Soft magnetic performance - Mechanical behavior
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:3664
Deposited By:Lesley Tobin
Deposited On:19 Jan 2009 12:00
Last Modified:19 Jan 2009 12:00

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