| 학회 |
한국재료학회 |
| 학술대회 |
2013년 봄 (05/23 ~ 05/24, 여수 엠블호텔(THE MVL)) |
| 권호 |
19권 1호 |
| 발표분야 |
F. 광기능/디스플레이 재료(Optical Functional and Display Materials) |
| 제목 |
The effect of different rare earth oxides on mechanical and optical properties of hot pressed α/β-SiAlON ceramics |
| 초록 |
The effect of Y2O3 and different REOs (La2O3, Nd2O3 and Er2O3) on mechanical and optical properties on Sialon ceramics was studied. Duplex α/β-Sialon ceramics were revealed by XRD patterns in sintered body. α-Sialon phase was increased abruptly with the addition of Y2O3 and different REOs. Mechanical properties were also increased with addition of REOs as compared without REOs. The crystallization at the triple junction with Y2O3 added Sialon was observed by TEM, which may be related to the slow cooling rate in hot press sintering process. Slow cooling rate causes the crystallization of glassy phase that occurred in grain boundaries and triple junctions. Crystallization of glassy phase enhances the mechanical properties of the material. Y2O3 had the positive effect on densification and mechanical properties. Mg-α/β-Sialon composite shows higher light transmission in NIR region than any other composition but better mechanical properties were shown by other compositions. |
| 저자 |
Yuwaraj Khatri Kshetri1, Bhupendra Joshi2, Bin Li3, Soo Wohn Lee4
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| 소속 |
1Research Center for Eco Multi-Functional Nano Materials, 2Sun Moon Univ., 3Chungnam 336-708, 4Republic of Korea |
| 키워드 |
Sialon; Hot pressing; Mechanical properties; Optical properties; Microstructure
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| E-Mail |
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