Preparation of Y-TZP/AI2O3 whisker preform by an in situ method

K. Okada, Yoshikazu Kameshima, H. Mutoh, S. Hayashi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In situ growth of AI2O3 whiskers into the matrix of Y-TZP (yttria-doped tetragonal zirconia polycrystals) was examined in order to prepare Y-TZP/AI2O3 whisker preform for the composites. Various shapes of AI2O3 particles were grown by the reaction of AI2O3 and AIF3 powders with moist nitrogen or oxygen gases at high temperature. They showed a trend to change the particle shapes from massive → rhombohedron → whisker → platelet as the processing temperature was increased. These particles, however, grew only on the surface and not inside the pellets It was found necessary to introduce the carrier gas inside the pellets for particle growth to occur internally. AI2O3 whiskers can be synthesized inside the pellets by mixing with an organic space-forming agent having a relatively large particle size.

Original languageEnglish
Pages (from-to)4081-4085
Number of pages5
JournalJournal of Materials Science
Volume29
Issue number15
DOIs
Publication statusPublished - Jan 1994
Externally publishedYes

Fingerprint

Crystal whiskers
preforms
Yttrium oxide
Polycrystals
polycrystals
zirconium oxides
Zirconia
Gases
preparation
pellets
Platelets
Powders
Nitrogen
Particle size
Oxygen
Temperature
Composite materials
Processing
platelets
gases

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)

Cite this

Preparation of Y-TZP/AI2O3 whisker preform by an in situ method. / Okada, K.; Kameshima, Yoshikazu; Mutoh, H.; Hayashi, S.

In: Journal of Materials Science, Vol. 29, No. 15, 01.1994, p. 4081-4085.

Research output: Contribution to journalArticle

Okada, K. ; Kameshima, Yoshikazu ; Mutoh, H. ; Hayashi, S. / Preparation of Y-TZP/AI2O3 whisker preform by an in situ method. In: Journal of Materials Science. 1994 ; Vol. 29, No. 15. pp. 4081-4085.
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