Direct calorimetric measurement of grain boundary and surface enthalpies in yttria-stabilized zirconia

Shushu Chen, Hugo J. Avila-Paredes, Sangtae Kim, Jinfeng Zhao, Zuhair A. Munir, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We measured the change in enthalpy with grain size of a dense nanograined yttria-stabilized zirconia by oxide melt solution calorimetry and derived a grain boundary enthalpy, 0.73 ± 0.19 J m -2. Surface enthalpies of nanopowders are 2.21 ± 0.14 J m -2 (anhydrous surface) and 1.60 ± 0.09 J m -2 (hydrous surface). The grain boundary enthalpy is about a factor of two smaller than the enthalpy of the anhydrous surface, suggesting that densification which maintains nanosized grains is indeed thermodynamically driven. This is the first direct calorimetric measurement of grain boundary enthalpy in a ceramic.

Original languageEnglish (US)
Pages (from-to)3039-3042
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume11
Issue number17
DOIs
StatePublished - 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Direct calorimetric measurement of grain boundary and surface enthalpies in yttria-stabilized zirconia'. Together they form a unique fingerprint.

Cite this