THE STRUCTURAL AND MICROSTRUCTURAL characteristics IN THE MILLED Fe50C50 MAGNETIC COMPOSITES

Setyo Purwanto, Engkir Sukirman

DOI: http://dx.doi.org/10.17146/jusami.2007.0.0.5113

Abstract


THE STRUCTURAL AND MICROSTRUCTURAL characteristics IN THE MILLED Fe50C50 MAGNETIC COMPOSITES. The structural and microstructural characteristics in the milled Fe50C50 magnetic composites have been investigated by the x-ray diffraction technique using Rietveld analysis method. The starting materials of composite were the pure iron (Fe) and carbon (C) powders (weight ratio Fe:C = 50:50). The composites were prepared by mixing Fe and C powders by high energy milling (HEM) at various milling time start from 1.5 to 4.5 h. The x-rays diffraction measurements were performed by using a Philips X-Ray Diffractometer, PW170 type at room temperature with CuKα radiation, 2θ range = 10°-100°, preset time = 1 sec, and step size = 0.020°. With a mechanical milling of 4.5 hours, the elemental powders undergo a better crystallization. It means that the amorphization. Of its components do not happen yet. The carbon elements in composites get a homogeneous strain field, while the iron elements get an inhomogeneous strain field. The crystallite size of C particles almost do not change yet until the milling time of 4.5 hours. This is presumably due to the C particles are trapped at the weld interfaces between the Fe particles. While, the Fe particles fracture into smaller segments on the milling time of 1.5 hours. On the further milling, the Fe particles undergo welding processes to be bigger crystallites. Magnetic parameter such as Hc, Ms and Ku were confirmed this suggestion.

Keywords


Mechanical milling, Fe50C50 composite, X-ray diffraction, Rietveld method

Refbacks

  • There are currently no refbacks.


Copyright (c) 2018 Jurnal Sains Materi Indonesia

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.


Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency of Indonesia
Phone : +62 21-758 74261, +62 21-756 2860 ext. 4009-4010, Fax.: +62 21-756 0926, e-mail: jusami@batan.go.id



preview previewpreviewpreviewpreviewpreviewpreviewpreviewpreview previewpreview

View My Stats
Creative Commons LicenseCopyright © 2019 Jusami | Indonesian Journal of Materials Science. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (CC BY-NC-SA 4.0).