ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Soft magnetic alloys consisting of nanoscale fcc Fe grains have been developed byprimary crystallization of melt-spun amorphous alloys as typically exemplified in Fe-B[1], Fe-M-B(M = Zr, Hf, Nb) (Nanoperm) [2] and Fe-Si-B-Nb-Cu (FINEMET)systems[3]. Lot of scientificeffort has been put in last years to control the crystallization process of metallic glasses. This is dueto the fact that several attractive properties of the resulting material are strongly related to the finalattained microstructure. In the present paper, primary nanocrystallization kinetics of a Fe–basedmulticomponent amorphous system namely Fe67Co18B14Si1 (2605CO) has been analysed by nonisothermalDSC measurements. Crystallization is a combined process of nucleation and growth.The amorphous alloy undergoes two-step crystallization with primary crystallization of α-Fe givingthe first step. The Avrami exponent for the two steps has been derived. A detailed analysis of thedata provides an insight in to the dimensionality and mechanism of growth
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.570.109.pdf
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