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 journalArticle

138 Citations (Scopus)

Abstract

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
Volume83
Issue number11
Publication statusPublished - 2000 Nov 1
Externally publishedYes

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Densification
mechanical property
fracture toughness
Sintering
Mechanical properties
Fracture toughness
elastic modulus
grain boundary
Reaction products
hardness
Melting point
Grain boundaries
melting
Elastic moduli
Hardness
sintering
temperature

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Densification and mechanical properties of B4C with Al2O3 as a sintering aid. / Kim, Hae Won; Koh, Young-Hag; Kim, Hyoun Ee.

In: Journal of the American Ceramic Society, Vol. 83, No. 11, 01.11.2000, p. 2863-2865.

Research output: Contribution to journalArticle

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