The improvement in the corrosion resistance of alumina in caustic alkaline solutions obtained by dispersing ceria-doped tetragonal zirconia particles

Tsugio Sato, Sigeki Sato, Akitsugu Okuwaki

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to improve the corrosion resistance and mechanical properties of Al2O3 in caustic alkaline solutions, ceria-doped tetragonal zirconia particles were dispersed at the grain boundaries of Al2O3. The fracture toughness and fracture strength of Al2O3/ceria-doped tetragonal zirconia composites greatly increased with increasing content of the ceria-doped tetragonal zirconia particles. Alumina ceramics were susceptible to attack by concentrated NaOH solutions above 150°C, whereas no noticeable corrosion was observed for ceria-doped tetragonal zirconia polycrystals (Ce-TZP) below 250°C. The degree of weight loss of Al2O3/Ce-TZP composites in NaOH solutions appreciably decreased with increasing Ce-TZP content up to 40 mol%.

Original languageEnglish
Pages (from-to)581-585
Number of pages5
JournalCorrosion Science
Volume33
Issue number4
DOIs
Publication statusPublished - 1992 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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