Plastic deformation and allotropic phase transformations in zirconia ceramics during high-pressure torsion

Kaveh Edalati, Shoichi Toh, Yoshifumi Ikoma, Zenji Horita

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Severe plastic deformation using high-pressure torsion (HPT) is successfully applied at room temperature to partially stabilized ZrO 2. X-ray diffraction and Raman spectroscopy analyses reveal that appreciable strain is introduced in the sample and a phase transformation with a coherent interface occurs from the metastable tetragonal phase to the monoclinic phase during HPT. The fraction of the stress-induced monoclinic phase increases with straining, reaches a saturation level. Transmission electron microscopy shows that nanograins of high dislocation density but with no twins are formed during HPT.

Original languageEnglish
Pages (from-to)974-977
Number of pages4
JournalScripta Materialia
Volume65
Issue number11
DOIs
Publication statusPublished - Dec 1 2011

All Science Journal Classification (ASJC) codes

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

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