Self-nanoscaling in FeCo alloys prepared via severe plastic deformation

TitleSelf-nanoscaling in FeCo alloys prepared via severe plastic deformation
Publication TypeJournal Article
Year of Publication2012
AuthorsPoudyal N, Rong CB, Zhang Y, Wang DP, Kramer MJ, Hebert RJ, Liu JP
Journal TitleJournal of Alloys and Compounds
Volume521
Pages55-59
Date Published04
Type of ArticleArticle
ISBN Number0925-8388
Accession NumberWOS:000300822300011
KeywordsFeCo alloys, magnetic-properties, Nanocrystalline materials, nanoparticles, powders, silicon nanowires, Soft magnetic materials, superlattices
Abstract

Nanocrystalline Fe100-xCox (x = 20, 35, 50, 60) alloys have been prepared by mechanical alloying of Fe and Co powders via high energy ball milling. The alloy formation process and microstructure evolution of the samples have been investigated. Energy filtered transmission microscopy (EFTEM) observations revealed the strip formation of the Fe and Co phases at an initial stage of milling. The final grain size of the equiaxed grains in the obtained alloys reached 8 nm upon milling for 20 h. The saturation magnetization of the mixtures of Fe and Co increases with milling time, indicating an increasing homogeneity in composition and the phase formation. It is found that the saturation magnetization is also dependent on the Co content, which reaches the highest value of 240 emu/g at Fe65Co35. The phase transformation of the as-prepared FeCo alloys was also studied using differential scanning calorimetry. (C) 2012 Elsevier B.V. All rights reserved.

URL<Go to ISI>://WOS:000300822300011
DOI10.1016/j.jallcom.2012.01.026
Alternate JournalJ. Alloy. Compd.