Paper Title:
Effect of Wheel Speed and Boron Content on Microstructure and Crystallographic Texture of Boron Substituted Sm-Co Melt Spun Ribbons
  Abstract

The Sm(Co0.71Fe0.1Cu0.12Zr0.04B0.03)7.5 (2:17 type magnet) melt spun ribbons have been produced from bulk as cast samples at low (5 m/sec) to medium (40 m/sec) wheel speed by the melt spinning technique. The crystallographic texture on wheel side, the microstructural characteristics and magnetic properties have been investigated. The soft magnetic fcc-Co forms a very high degree of texture especially at low velocities but for the first time a degree of texturing has been remarked on fcc-Co grains. Diffraction patterns have been traced by x-ray scattering using Cu-Kα radiation on the wheel and free side of the ribbons. In the pattern of ribbons which have been produced at 5 m/sec the (002) plane of fcc-Co is almost the dominant peak while at 40 m/sec this peak diminishes in parallel to the appearance of the structure type TbCu7 and (111) plane of fcc-Co structure. Scanning electron microscopy on the wheel side of the ribbons has been used to observe microstructural characteristics and showed that the formation of texture is attributed to the appearance of dendrites, with their long axis parallel to the longitudinal direction of the ribbons. Dendrites’ density depends on the wheel speed of the roller and boron content. It decreases as the velocity increases while for constant velocity of about 40 m/sec, higher boron content stabilizes higher degree of texturing. Magnetic properties are also examined from low to medium wheel speed by also using the magnetooptical Kerr microscopy. Therefore coercive field as high as 3.4 kOe and reduced remanence (mr) of ~0.76 has been detected from the hysteresis curve for as spun Sm Co0.71Fe0.1Cu0.12Zr0.04B0.03)7.5 ribbons at 5 m/sec.

  Info
Periodical
Materials Science Forum (Volumes 514-516)
Edited by
Paula Maria Vilarinho
Pages
359-363
DOI
10.4028/www.scientific.net/MSF.514-516.359
Citation
S. S. Makridis, E. Pavlidou, A. Neudert, J. McCord, R. Schäfer, G. C. Hadjipanays, D. Niarchos, A. K. Stubos, "Effect of Wheel Speed and Boron Content on Microstructure and Crystallographic Texture of Boron Substituted Sm-Co Melt Spun Ribbons", Materials Science Forum, Vols. 514-516, pp. 359-363, 2006
Online since
May 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xiaoqian Bao, Mao Cai Zhang, Yi Qiao, Shouzeng Zhou
Abstract:Nanocomposite Pr7.5Dy1Fe71Co15Nb1B4.5 ribbons were prepared by melt-spinning and subsequent annealing. Interaction domains were imaged using...
2127
Authors: Sofoklis S. Makridis
Abstract:We have investigated the structural and magnetic properties of Sm(Co0.70Fe0.1Ni0.12Zr0.04B0.04)7.5 melt spun ribbons. The arc-melted bulk...
404
Authors: Jie Qiu, Shan Dong Li, Mei Mei Liu, Jian Peng Wu, Yi Hu, Xin Le Cai, Jian Hua Lin, Li Li Wang
Chapter 1: Advanced Materials Design
Abstract:Nanocomposite (Nd,Dy)2Fe14B/α-Fe magnets were prepared by directly solidification (DS). The effect of wheel speed on...
23
Authors: Krystian Prusik, Katarzyna Bałdys, Danuta Stróż, Tomasz Goryczka, Józef Lelątko
Chapter 8: Magnetic Shape Memory Alloys
Abstract:In present paper two ribbons of the Ni44Co6Mn36In14 (at.%) were prepared under different...
436
Authors: Wojciech Maziarz, Paweł Czaja, Marek Faryna, Tomasz Czeppe, Anna Góral, Jan Dutkiewicz
III. Poster Session
Abstract:The influence of Al substitution for Sn in Ni44Mn43.5AlxSn12.5-x (x= 0, 1, 2, 3) ferromagnetic...
232