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 language | English |
|---|---|
| Pages (from-to) | 2863-2865 |
| Number of pages | 3 |
| Journal | Journal of the American Ceramic Society |
| Volume | 83 |
| Issue number | 11 |
| Publication status | Published - 2000 Nov 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Ceramics and Composites
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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 journal › Article
}
TY - JOUR
T1 - Densification and mechanical properties of B4C with Al2O3 as a sintering aid
AU - Kim, Hae Won
AU - Koh, Young-Hag
AU - Kim, Hyoun Ee
PY - 2000/11/1
Y1 - 2000/11/1
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0034321246&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0034321246
VL - 83
SP - 2863
EP - 2865
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 11
ER -