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

67 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

Fingerprint

zirconium oxides
Zirconia
Torsional stress
plastic deformation
torsion
phase transformations
Plastic deformation
Phase transitions
ceramics
Metastable phases
Raman spectroscopy
Transmission electron microscopy
saturation
X ray diffraction
transmission electron microscopy
room temperature
diffraction
spectroscopy
zirconium oxide
x rays

All Science Journal Classification (ASJC) codes

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

Cite this

Plastic deformation and allotropic phase transformations in zirconia ceramics during high-pressure torsion. / Edalati, Kaveh; Toh, Shoichi; Ikoma, Yoshifumi; Horita, Zenji.

In: Scripta Materialia, Vol. 65, No. 11, 01.12.2011, p. 974-977.

Research output: Contribution to journalArticle

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