Constrained densification in boehmite-alumina mixtures for the fabrication of porous alumina ceramics

S. Kwon, G. L. Messing

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

It is demonstrated that inherent constrained densification characteristics of the bimodal size distributed powders can be utilized to fabricate porous alpha alumina. Seeded boehmite was mixed with coarse alpha alumina particles to produce various compositions of bimodal mixtures. The densification behaviour of the mixtures was correlated with shrinkage and microstructural evolution. The mixtures sintered at 1200°C contained more than 30% porosity and the mechanical strength of the mixtures was increased by 2-4 fold relative to the coarse particles alone with similar porosity (< 5 MPa).

Original languageEnglish (US)
Pages (from-to)913-921
Number of pages9
JournalJournal of Materials Science
Volume33
Issue number4
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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