Band structure based predictive criteria for selecting densifying additives during sintering of transition metal based hardmetals and iono-covalent ceramics

A. A. Ogwu, T. J. Davies

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

It is our observation that the thermo-kinetic factors associated with sintering and densification in transition metal based hardmetal-binder systems and in iono-covalent ceramics with metal oxide additives have a common feature, namely an underpinning electronic driving force. The commonality of the electronic driving force mechanism for sintering and densification is due to the presence of bonding and anti-bonding energy levels in both systems. It is our proposal that the filling of the anti-bonding levels with electrons leads to destabilization, liquid phase formation and rapid diffusion that assists sintering and densification.

Original languageEnglish
Pages (from-to)131-135
Number of pages5
JournalPhysica B: Condensed Matter
Volume222
Issue number1-3
DOIs
Publication statusPublished - May 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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