| 학회 |
한국재료학회 |
| 학술대회 |
2008년 가을 (11/07 ~ 11/07, 차세대융합기술연구원) |
| 권호 |
14권 2호 |
| 발표분야 |
나노생체재료 |
| 제목 |
Liquid phase sintering of zirconia using magnesium aluminum silicate(MAS) glass |
| 초록 |
The sintering behavior and mechanical properties of magnesium aluminum silicate(MAS) glass added, 3 wt% Yittria stabilized zirconia (YSZ3) is investigated in this study.High purity yittria stabilized zirconia and MAS glass powders were used as starting powders. Magnesium aluminum silicate glass (17.5 MgO, 21.5 Al2O3 and 61.0 SiO2 in wt.%) proved to be effective in reducing the sintering temperature of YSZ3. The composite made by wet mixing the MAS and Yittria stabilize zirconia powder using ethanol, dried, sieved and uniaxially pressed. The samples were sintered in air at 1200 °C, 1300 °C, 1400 °C and at 1450 °C for 120 min, with heating and cooling rates of 10 °C/min to determine the optimal condition for liquid-phase sintering of zirconia with MAS glass additive. Sintered samples were characterized by relative density, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The YSZ3 samples doped with 0.5 wt.% MAS can reach 97% theoretical density (TD) at 1400°C in 5 h. Optimum firing temperatures in the sintering of MAS-doped samples are found to be around 1400°C. Higher sintering temperatures result in a density drop which is attributed to formation of porosity and/or the early onset of solid state sintering at elevated temperatures. The hardness of pure and MAS glass added YSZ3 are studied using Vicker’s Indenter. Glassy additives will form amorphous grain boundary phases plays an important role in micro structural development during sintering and also influence the properties of the sintered zirconia. |
| 저자 |
Sanosh K P1, S. J. Cho2, M.C. Chu3, M.W. Ko3, Y.J. Lee1, T.N. Kim2
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| 소속 |
1Materials Engineering, 2Paichai Univ., 3Korea Research institute of Standards and Science |
| 키워드 |
Zirconia; MAS glass
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| E-Mail |
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