Effects of content and size of Al2O3 particle dispersion on the sintering densification rate of Y-PSZ/Al2O3 composites

Jing Feng Li, Akira Kawasaki, Ryuzo Watanabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The sintering behavior of fine-grained ZrO2 (3mol% Y2O3) powder compacts containing 10-30vol% Al2O3 during constant-heating-rate sintering has been studied, with particular emphasis on the size effect of Al2O3 particles. The additions of Al2O3 particles retarded the densification and the effect was more remarkable with increasing Al2O3 volume fraction. The retardation effect of the Al2O3 dispersion particles was found to be independent of the particle size, and has been discussed from the following two aspects: (1) interactions between the dispersion particles that create a constraint on the matrix, and (2) formations of large pores or low-density regions around the dispersion particles due to non-uniform parking density in the mixed powder compacts.

Original languageEnglish
Pages (from-to)1083-1088
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume44
Issue number12
DOIs
Publication statusPublished - 1997 Dec

Keywords

  • Alumina
  • Ceramic composite
  • Partially stabilized zirconia
  • Powder mixing
  • Sintering

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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