화학공학소재연구정보센터
Advanced Powder Technology, Vol.27, No.4, 1101-1108, 2016
Effect of the carbon nanotubes on structure and magnetic properties of the Fe-Cu (4:1) composites
Nanocomposite materials (NCMs) of the Fe-Cu (4:1) system with/without small addition of carbon nanotubes (CNTs) have been synthesized by mechano-chemical activation of elemental Fe and Cu powders in a high energy planetary ball mill and have been examined by the X-ray diffraction method, SEM and magnetometric studies. The metastable alpha-(Fe, Cu) supersaturated solid solution is formed in the Fe-Cu nanocomposites during milling process, while a small addition (up to 2 vol.%) of the carbon nanotubes into the Fe-Cu charge results in formation of the martensite-type alpha-(Fe, Cu, C) phase. The coherent scattering block size of the materials obtained is decreased with milling time increasing. The duration of mechano-chemical activation affects the magnetic properties of nanocomposites studied. Formation of the alpha-(Fe, Cu, C) phase causes a significant increase of both coercive force and tensile strength of the Fe-Cu (4:1) + CNTs NCMs. (C) 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.