Densification and mechanical properties of B4C with Al2O3 as a sintering aid

Hae Won Kim, Young Hag Koh, Hyoun Ee Kim

Research output: Contribution to journalArticlepeer-review

186 Citations (Scopus)


The densification behavior and mechanical properties of B4C hot-pressed at 2000 °C for 1 h with additions of Al2O3 up to 10 vol% were investigated. Sinterability was greatly improved by the addition of a small amount of Al2O3. The improvement was attributed to the enhanced mobility of elements through the Al2O3 near the melting temperature or a reaction product formed at the grain boundaries. As a result of this improvement in the density, mechanical properties, such as hardness, elastic modulus, strength, and fracture toughness, increased remarkably. However, when the amount of Al2O3 exceeded 5 vol%, the level of improvement in the mechanical properties, except for fracture toughness, was reduced presumably because of the high thermal mismatch between B4C and Al2O3.

Original languageEnglish
Pages (from-to)2863-2865
Number of pages3
JournalJournal of the American Ceramic Society
Issue number11
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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