| 동결-젤 주조 공정 기반 삼차부틸알코올을 이용한 단일방향 기공구조를 가지는 이상인산칼슘 세라믹 지지체의 제조 및 특성평가 |
| 김경록, 옥경민, 김동현, 박홍채, 윤석영 |
| 부산대학교 재료공학부 |
| Fabrication and Characterization of Biphasic Calcium Phosphate Scaffolds with an Unidirectional Macropore Structure Using Tertiary-Butyl Alcohol-Based Freeze-Gel Casting Method |
| Kyeong-Lok Kim, Kyung-Min Ok, Dong-Hyun Kim, Hong-Chae Park, Seog-Young Yoon |
| School of Materials Science and Engineering, Pusan National University |
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| ABSTRACT |
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Porous biphasic calcium phosphate scaffolds were fabricated by a freeze-gel casting technique using a tertiary-butyl alcohol (TBA)-based slurry. After sintering, unidirectional macropore channels of scaffolds aligned regularly along the TBA ice growth direction were tailored simultaneously with micropores formed in the outer wall of the pore channels. The crystallinity, micro structure, pore configuration, bulk density, and compressive strength for the scaffolds were investigated with X-ray diffractometery, scanning electron microscopy analysis, a water immersion method, and a universal test machine. The results revealed that the sintered porosity and pore size generally resulted in a high solid loading which resulted in low porosity and small pore size, which relatively increased the higher compressive strength. After being sintered at $1100-1300^{circ}C$, the scaffolds showed an average porosity and compressive strength in the range 35.1-74.9% and 65.1-3.0 MPa, respectively, according to the processing conditions. |
| Key words:
Calcium phosphate, Gelcasting, Pores/Porosity, Strength |
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