Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation


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Microstructure and soft magnetic properties of bulk amorphous and/or nanocrystalline Fe73.5Cu1Nb3Si13.5B9(Finemet) alloys prepared by consolidation at a ultra-high pressure (5.5GPa) were investigated in this paper. The relative density of the bulk sample 1 (from amorphous powders) was 98.5% and the grain sizes were about 10.6nm. While the relative density and grain sizes of bulk sample 2 (from nanocrystalline powders) are 98% and 20.1nm, respectively. Particularly, the bulk samples exhibited a good combined magnetic property: for Sample1, Ms=125emu/g and Hc=1.5Oe; for Sample2, Ms=129emu/g and Hc=3.3Oe. The success of synthesizing the nanocrystalline Fe-based bulk alloys will be encouraging for the future development of bulk nanocrystalline soft magnetic alloys.



Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim




W. Lu and B. Yan, "Bulk Amorphous and/or Nanocrystalline Finemet Alloy Prepared by Super-High-Pressure Consolidation", Materials Science Forum, Vols. 534-536, pp. 1297-1300, 2007

Online since:

January 2007





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