抄録
Si3N4-Si2N2O-TiN composite ceramics were in-situ fabricated by using following reactions of (1) 3TiO 2 + Si3N4 → 3TiN + 3SiO2 + N2 and (2) Si3N4+ SiO2 → 2Si2N2O. The mixed powder of α-Si3N 4, Al2O3, Y2O3 and TiO2 was hot-pressed at 24 MPa and 1800°-1900°C for 1-4 h in N2. Sintered composite ceramics were characterized by XRD, SEM, TEM, four-point bending test and Vickers indentation method. XRD results and TEM observation showed that TiN and amorphous SiO2 were formed at 1250°C by the reaction (1), and the Si2N2O phase formed by reaction (2) above 1800°C. Si3N4-Si 2N2O-TiN composites consisted of ≥2 μm sized Si 2N2O grains with TiN and Si3N4 grains. Hardness and fracture strength of the composites were comparable to those of Si2N2O ceramics, with fracture toughness being improved at 5vol% TiN containing composites.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 227-230 |
| ページ数 | 4 |
| ジャーナル | Key Engineering Materials |
| 巻 | 403 |
| DOI | |
| 出版物ステータス | Published - 2009 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
これを引用
In-situ synthesis and mechanical properties of TiN-Si2N 2O-Si3N4 composites. / Kiyono, Hajime; Shimada, Shiro.
：: Key Engineering Materials, 巻 403, 2009, p. 227-230.研究成果: Article
}
TY - JOUR
T1 - In-situ synthesis and mechanical properties of TiN-Si2N 2O-Si3N4 composites
AU - Kiyono, Hajime
AU - Shimada, Shiro
PY - 2009
Y1 - 2009
N2 - Si3N4-Si2N2O-TiN composite ceramics were in-situ fabricated by using following reactions of (1) 3TiO 2 + Si3N4 → 3TiN + 3SiO2 + N2 and (2) Si3N4+ SiO2 → 2Si2N2O. The mixed powder of α-Si3N 4, Al2O3, Y2O3 and TiO2 was hot-pressed at 24 MPa and 1800°-1900°C for 1-4 h in N2. Sintered composite ceramics were characterized by XRD, SEM, TEM, four-point bending test and Vickers indentation method. XRD results and TEM observation showed that TiN and amorphous SiO2 were formed at 1250°C by the reaction (1), and the Si2N2O phase formed by reaction (2) above 1800°C. Si3N4-Si 2N2O-TiN composites consisted of ≥2 μm sized Si 2N2O grains with TiN and Si3N4 grains. Hardness and fracture strength of the composites were comparable to those of Si2N2O ceramics, with fracture toughness being improved at 5vol% TiN containing composites.
AB - Si3N4-Si2N2O-TiN composite ceramics were in-situ fabricated by using following reactions of (1) 3TiO 2 + Si3N4 → 3TiN + 3SiO2 + N2 and (2) Si3N4+ SiO2 → 2Si2N2O. The mixed powder of α-Si3N 4, Al2O3, Y2O3 and TiO2 was hot-pressed at 24 MPa and 1800°-1900°C for 1-4 h in N2. Sintered composite ceramics were characterized by XRD, SEM, TEM, four-point bending test and Vickers indentation method. XRD results and TEM observation showed that TiN and amorphous SiO2 were formed at 1250°C by the reaction (1), and the Si2N2O phase formed by reaction (2) above 1800°C. Si3N4-Si 2N2O-TiN composites consisted of ≥2 μm sized Si 2N2O grains with TiN and Si3N4 grains. Hardness and fracture strength of the composites were comparable to those of Si2N2O ceramics, with fracture toughness being improved at 5vol% TiN containing composites.
KW - Composites
KW - Mechanical properties
KW - Reaction sintering
KW - Silicon nitride
KW - Silicon oxynitride
KW - Titanium nitride
UR - http://www.scopus.com/inward/record.url?scp=58949089722&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58949089722&partnerID=8YFLogxK
U2 - 10.4028/3-908454-00-X.227
DO - 10.4028/3-908454-00-X.227
M3 - Article
AN - SCOPUS:58949089722
VL - 403
SP - 227
EP - 230
JO - Key Engineering Materials
JF - Key Engineering Materials
SN - 1013-9826
ER -