jap banner
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Soft Magnetic Materials

J. Appl. Phys. 111, 07A316 (2012); http://dx.doi.org/10.1063/1.3673433 (3 pages)

In-situ investigation of phase formation in nanocrystalline (Co97.5Fe2.5)89Zr7B4 alloy by high temperature x-ray diffraction

Samuel J. Kernion1, Paul R. Ohodnicki2, and Michael E. McHenry1

1Materials Science and Engineering Department, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
2National Energy Technology Laboratory, Chemistry and Surface Science Division, Pittsburgh, Pennsylvania 15236, USA

View MapView Map

(Received 23 September 2011; accepted 29 October 2011; published online 16 February 2012)

Crystallization and phase evolution in an (Co97.5Fe2.5)89Zr7B4 amorphous alloy was studied by high temperature x-ray diffraction (HTXRD) and transmission electron microscopy (TEM). Co-based nanocomposite alloys have zero magnetostriction and a strong response to magnetic field annealing making them interesting for sensor and high frequency power applications. Amorphous alloys, synthesized by single roll melt-spinning, develop a nanocomposite structure after primary crystallization. After annealing at 540 °C for 1 h, TEM images and diffraction patterns confirm a grain size of 19 nm and the presence of at least two phases. HTXRD results show preferential body centered cubic (bcc) nucleation and formation of multiple phases at various stages of crystallization. Only the face centered cubic (fcc) phase remained at temperatures above 600 °C. On heating, the lattice parameter of the fcc phase increases at a rate higher than expected from thermal expansion. This is partially explained by an increase in the Fe-concentration in fcc crystallites.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL PROCEDURES
  3. RESULTS AND DISCUSSION
  4. CONCLUSIONS

KEYWORDS, PACS, and IPC

Keywords

amorphous state, annealing, boron alloys, cobalt alloys, crystallisation, crystallites, ferromagnetic materials, grain size, iron alloys, lattice constants, magnetostriction, melt spinning, nanocomposites, nanofabrication, nanomagnetics, nucleation, thermal expansion, transmission electron microscopy, X-ray diffraction, zirconium alloys

PACS

  • 61.46.Df

    Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots)

  • 75.50.Bb

    Fe and its alloys

  • 75.50.Tt

    Fine-particle systems; nanocrystalline materials

  • 75.80.+q

    Magnetomechanical effects, magnetostriction

  • 81.07.Bc

    Nanocrystalline materials

  • 64.70.dg

    Crystallization of specific substances

International Patent Classification (IPC)

  • C22C38/00

    Ferrous alloys, e.g. steel alloys

  • B01D9/00

    Crystallisation

  • B82B1/00

    Nano-structures

  • B82B3/00

    Manufacture or treatment of nano-structures

  • C21D1/26

    Methods of annealing

  • C22C16/00

    Alloys based on zirconium

  • C22C19/00

    Alloys based on nickel or cobalt

  • H01F1/00

    Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3673433

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    P. R. Ohodnicki, Jr., J. Long, D. E. Laughlin, M. E. McHenry, and V. Keylin, J. Appl. Phys. 104, 113909 (2008)JAPIAU000104000011113909000001.

    A. Chaturvedi, N. Laurita, A. Leary, M. H. Phan, M. E. McHenry, and H. Srikanth, J. Appl. Phys. 109, 107C706 (2011)JAPIAU00010900000707B508000001.

    N. Laurita, A. Chaturvedi, A. Leary, C. Bauer, C. Miller, M. H. Phan, M. E. McHenry, and H. Srikanth, J. Appl. Phys. 109, 07B508 (2011)JAPIAU00010900000707C706000001.


Figures (4)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. In-situ investigation of phase formation in nanocrystalline (Co97.5Fe2.5)89Zr7B4 alloy by high temperature x-ray diffraction
  2. Development of a composite material with high magnetic permeability and low loss factor for high frequency application
  3. Analysis of heating effects (magnetic hyperthermia) in FeCrSiBCuNb amorphous and nanocrystalline wires
  4. Dual phase transformation and resultant magnetic properties in Fe3Pt thin films
  5. Soft magnetic properties of bulk FeCoMoPCBSi glassy core prepared by copper mold casting
Go to AIP Home
Copyright © American Institute of Physics
close