| 알루미나/지르코니아 층상 복합체의 미세구조 및 기계적 성질 |
| 유승우, 박영민, 양태영, 류수착1, 김영우2, 윤석영, 박홍채 |
부산대학교 재료공학부
1부산대학교 나노정보소재공학과
2포항산업과학연구원 기능성재료연구팀 |
| Microstructure and Mechanical Properties of Alumina/Zirconia Layered Composites |
| Seung-Woo Lyu, Young-Min Park, Tae-Young Yang, Su-Chak Ryu1, Young-Woo Kim2, Seog-Young Yoon, Hong-Chae Park |
School of Materials Science and Engineering, Pusan National University
1Department of Nano Information Materials Science and Engineering, Pusan National University
2Functional Materials Research Team, Research Institute of Industrial Science and Technology |
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| ABSTRACT |
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Symmetric three-layer $Al_2O_3/ZrO_2$ composite has been prepared by freeze casting and pressureless sintering at $1400-1600^{circ}C$ in air. The layered material sintered at $1600^{circ}C$ showed the maximum fracture strength (410 MPa), measured by a four-point bending test. Contact damage strength was superior in three-layer composite compared with corresponding mono-layered material, possibly due to the development of relatively large compressive stress. The grain growth of $ZrO_2$ particles was mainly governed by coalescence mechanism. |
| Key words:
Symmetric three-layer $Al_2O_3/ZrO_2$ composite, Freeze casting |
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