Seeding of the Reaction-Bonded Aluminum Oxide Process

Ender Suvaci, Gary L. Messing

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The effect of the initial α-Al2O3 particle size in the reaction-bonded aluminum oxide (RBAO) process on the phase transformation of aluminum-derived γ-Al2O3 to α-Al2O3, and subsequently densification, was investigated. It has been demonstrated that if the initial α-Al2O3 particles are fine (∼0.2 μm, i.e., 2.9 x 1014 γ-Al2O3 particles/cm3), then they seed the phase transformation. The fine α-Al2O3 decreases the transformation temperature to ∼962°C and results in a finer microstructure. The smaller particle size of the seeded RBAO decreases the sintering temperature to as low as ∼1135°C. The results confirm that seeding can be utilized to improve phase transformations and densification and subsequently to tailor final microstructures in RBAO-derived ceramics.

Original languageEnglish (US)
Pages (from-to)657-659
Number of pages3
JournalJournal of the American Ceramic Society
Volume84
Issue number3
DOIs
StatePublished - Mar 2001

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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