Formation of Fe86Zr5.5Nb5.5B3 Nanocrystalline Bulk Alloy under High Pressure

Abstract:

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Mechanical alloying(MA) technique and single-roller melt spinning technique were used to prepare Fe86Zr5.5Nb5.5B3 nanocrystalline and amorphous powders, bulk alloys were prepared by cryogenically high-pressure quick sintering. The results showed that: (1) after MA process for 15 hours, the grain size of α-Fe phase was ≤10nm; (2) melt spinning powders were fragmented by ball milling, but remained amorphous state. The crystallization temperature of this amorphous powder was about 500°C. Apparent activation energy of the amorphous crystallization was E=294.1KJ/mol; (3) under the quick sintering conditions of P=5.5GPa/t=3min/Pw≥1050W, single phaseα-Fe nanocrystalline(8~15nm) bulk alloys with relative density≥98.7% can be obtained.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

3467-3470

DOI:

10.4028/www.scientific.net/MSF.475-479.3467

Citation:

B. Lu et al., "Formation of Fe86Zr5.5Nb5.5B3 Nanocrystalline Bulk Alloy under High Pressure", Materials Science Forum, Vols. 475-479, pp. 3467-3470, 2005

Online since:

January 2005

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$35.00

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