Sintering and mechanical properties of Y-TZP/SiC composites

Shinya Terauchi, Tsugio Sato, Tadashi Endo, Masahiko Shimada

Research output: Contribution to journalArticlepeer-review

Abstract

Zirconia powders containing 3mol% Y2O3 were mixed with SiC powders or SiC whiskers by ball-milling and were uniaxially pressed at 10MPa prior to cold isostatic pressing at 200MPa. The green bodies were sintered at 1450 and 1500°C for 1-18 hours under a stream of 95vol%He-5vol%CO gas, and then were hot isostatically pressed at 1450°C and 150MPa for 1 hour in an Ar gas atmosphere. The density of HIPed bodies increased with increasing that of presintered bodies. The presintered bodies of Y-TZP/2.5vol%SiC particle composites with a relative density above 93% could be densified to almost fully theoretical density by HIPing. The bending strength of the Y-TZP/SiC(particle) and Y-TZP/SiC(whisker) composites increased by hot isostatic pressing, while the values of the Weibull modulus did not increase.

Original languageEnglish
Pages (from-to)1063-1066
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume37
Issue number7
Publication statusPublished - 1990 Sep
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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