Recombinant domain movement mechanism in superplastic deformation of TZP ceramics

Kouichi Yasuda, Taku Okamoto, Tadashi Shiota, Yohtaro Matsuo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

High-temperature tensile tests were repeatedly carried out for a tetragonal zirconia polycrystals (TZP) specimen, and the position vectors of 500 grains were measured by FE-SEM image analysis. The displacement vector map showed that several grains moved to the same direction and a kind of domain was formed; these domains (several micrometer in size) moved in the sea of randomly moving grains; however, these domains were soon constrained by the surrounding sea and disappeared; subsequently, new domains were formed in other places by re-combination of grains in order to continue superplastic deformation. Based on these phenomena, the authors proposed a new deformation mechanism called "Recombinant Domain Movement" in this paper.

Original languageEnglish
Pages (from-to)115-119
Number of pages5
JournalMaterials Science and Engineering A
Volume418
Issue number1-2
DOIs
Publication statusPublished - Feb 25 2006
Externally publishedYes

Keywords

  • Deformation mechanism
  • Domain
  • Superplasticity
  • TZP

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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