The varied kinetics mechanisms in the synthesis of MgB2 from elemental powders by low-temperature sintering

  • Ma Z
  • Liu Y
  • 4

    Readers

    Mendeley users who have this article in their library.
  • 18

    Citations

    Citations of this article.

Abstract

The in situ X-ray diffraction technique is adopted to determine the degree of reaction between Mg and B at several isothermal temperatures below Mg melting. Based on these isothermal data, a kinetics analysis of MgB2 phase formation during the low-temperature sintering is carried out. It is found that the reaction between Mg and B is controlled by varied mechanisms. In the initial stage, the reaction rate is mainly controlled by a phase boundary reaction mechanism. As the reaction proceeds, the diffusion-limited mechanism gradually becomes dominant. The corresponding activation energy also firstly decreases, and then increases again during the whole reaction process. Combined with the classic solid-sintering theory, the determined kinetics model is valid and consistent with the actual sintering process. © 2010 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Sintering
  • Superconductivity
  • Superconductors
  • X-ray diffraction topography

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free