Abstract
The sintered structures of amorphous Si 3N 4-BN composite powder were investigated with sintering aids from the Y 2O 3-Al 2O 3 and Y 2O 3-TiO 2-AlN systems. In the Y 2O 3-Al 2O 3 system, β-Si 3N 4 and h-BN crystallized during sintering. TiN additionally appeared in the Y 2O 3-TiO 2-AlN system. The microstructure of the Si 3N 4-BN composite was observed by SEM. Flaky BN particles with a length of about 1.0-1.5 μm were observed in the Si 3N 4 matrix. The Si 3N 4 matrix had a fine-grained microstructure in the Y 2O 3-Al 2O 3 system, whereas rod-like Si 3N 4 grains with a length of 3-10 μm were observed in the Y 2O 3-TiO 2-AlN system. The morphology of the TiN particles was observed by TEM. Small TiN particles of about 0.1 μm in diameter were included in large Si 3N 4 grains, but these fine TiN inclusions were a rare case. Large TiN particles of about 1 μm in diameter were located at grain boundaries throughout the sintered body. The thermal shock resistance of Si 3N 4 was improved by the BN inclusions in the Y 2O 3-Al 2O 3 system. With the Y 2O 3-TiO 2-AlN system, the TiN inclusions increased the fracture toughness of the Si 3N 4-BN composite but the thermal shock resistance was reduced.
| Original language | English |
|---|---|
| Pages (from-to) | 6-9 |
| Number of pages | 4 |
| Journal | Journal of Ceramic Processing Research |
| Volume | 4 |
| Issue number | 1 |
| Publication status | Published - 2003 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
Cite this
Rod-like Si 3N 4 grain growth in the sintered body of amorphous Si 3N 4-BN composite powder with sintering additives. / Kugimoto, Hironori; Uehara, Masato; Enomoto, Naoya; Hojo, Junichi.
In: Journal of Ceramic Processing Research, Vol. 4, No. 1, 2003, p. 6-9.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Rod-like Si 3N 4 grain growth in the sintered body of amorphous Si 3N 4-BN composite powder with sintering additives
AU - Kugimoto, Hironori
AU - Uehara, Masato
AU - Enomoto, Naoya
AU - Hojo, Junichi
PY - 2003
Y1 - 2003
N2 - The sintered structures of amorphous Si 3N 4-BN composite powder were investigated with sintering aids from the Y 2O 3-Al 2O 3 and Y 2O 3-TiO 2-AlN systems. In the Y 2O 3-Al 2O 3 system, β-Si 3N 4 and h-BN crystallized during sintering. TiN additionally appeared in the Y 2O 3-TiO 2-AlN system. The microstructure of the Si 3N 4-BN composite was observed by SEM. Flaky BN particles with a length of about 1.0-1.5 μm were observed in the Si 3N 4 matrix. The Si 3N 4 matrix had a fine-grained microstructure in the Y 2O 3-Al 2O 3 system, whereas rod-like Si 3N 4 grains with a length of 3-10 μm were observed in the Y 2O 3-TiO 2-AlN system. The morphology of the TiN particles was observed by TEM. Small TiN particles of about 0.1 μm in diameter were included in large Si 3N 4 grains, but these fine TiN inclusions were a rare case. Large TiN particles of about 1 μm in diameter were located at grain boundaries throughout the sintered body. The thermal shock resistance of Si 3N 4 was improved by the BN inclusions in the Y 2O 3-Al 2O 3 system. With the Y 2O 3-TiO 2-AlN system, the TiN inclusions increased the fracture toughness of the Si 3N 4-BN composite but the thermal shock resistance was reduced.
AB - The sintered structures of amorphous Si 3N 4-BN composite powder were investigated with sintering aids from the Y 2O 3-Al 2O 3 and Y 2O 3-TiO 2-AlN systems. In the Y 2O 3-Al 2O 3 system, β-Si 3N 4 and h-BN crystallized during sintering. TiN additionally appeared in the Y 2O 3-TiO 2-AlN system. The microstructure of the Si 3N 4-BN composite was observed by SEM. Flaky BN particles with a length of about 1.0-1.5 μm were observed in the Si 3N 4 matrix. The Si 3N 4 matrix had a fine-grained microstructure in the Y 2O 3-Al 2O 3 system, whereas rod-like Si 3N 4 grains with a length of 3-10 μm were observed in the Y 2O 3-TiO 2-AlN system. The morphology of the TiN particles was observed by TEM. Small TiN particles of about 0.1 μm in diameter were included in large Si 3N 4 grains, but these fine TiN inclusions were a rare case. Large TiN particles of about 1 μm in diameter were located at grain boundaries throughout the sintered body. The thermal shock resistance of Si 3N 4 was improved by the BN inclusions in the Y 2O 3-Al 2O 3 system. With the Y 2O 3-TiO 2-AlN system, the TiN inclusions increased the fracture toughness of the Si 3N 4-BN composite but the thermal shock resistance was reduced.
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UR - http://www.scopus.com/inward/citedby.url?scp=2542633416&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:2542633416
VL - 4
SP - 6
EP - 9
JO - Journal of Ceramic Processing Research
JF - Journal of Ceramic Processing Research
SN - 1229-9162
IS - 1
ER -