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      이트리아 첨가 붕규산염 유리로 제조한 알루미나-유리 복합체의 강도 평가 = An Evalution of the Strength of Alumina-Glass Composites by Melt-Infiltration Processing of Y₂O₃Containing Borosilicate Glasses

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      https://www.riss.kr/link?id=A1989463

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      This study was performed to investigate the strength of dental alumina-glass composites. Four different brosilicacte glasses containing 1, 3, 6, 9 mol% Y₂O³ were prepared. Alumina compacts were prepared by pressing 150㎏/㎠ and sintering at 1100℃ for 2 hours. Dense composites were made by infiltrating partially sintered alumina with at 1200℃ for 6 hours.
      The obtained results were summarized as follows:

      1. With increasing the amount of Y₂O₃ the peak of exothermic heat and softening point were shifted to the higher temperature.
      2. Borosilicate glasses showed the coefficient of thermal expansion in the range of 6.36 to 6.56×10-6/℃.
      3. The maximum biaxial strength of 385.7±34.4MPa was obtained with an addition of 6mol% Y₂O₃.
      4. The observation of fracture surfaces showed the crack deflection and crack bridging and that appeared to be the principal strengthening mechanism in the alumina-glass composites.


      번역하기

      This study was performed to investigate the strength of dental alumina-glass composites. Four different brosilicacte glasses containing 1, 3, 6, 9 mol% Y₂O³ were prepared. Alumina compacts were prepared by pressing 150㎏/㎠ and sintering at 1100�...

      This study was performed to investigate the strength of dental alumina-glass composites. Four different brosilicacte glasses containing 1, 3, 6, 9 mol% Y₂O³ were prepared. Alumina compacts were prepared by pressing 150㎏/㎠ and sintering at 1100℃ for 2 hours. Dense composites were made by infiltrating partially sintered alumina with at 1200℃ for 6 hours.
      The obtained results were summarized as follows:

      1. With increasing the amount of Y₂O₃ the peak of exothermic heat and softening point were shifted to the higher temperature.
      2. Borosilicate glasses showed the coefficient of thermal expansion in the range of 6.36 to 6.56×10-6/℃.
      3. The maximum biaxial strength of 385.7±34.4MPa was obtained with an addition of 6mol% Y₂O₃.
      4. The observation of fracture surfaces showed the crack deflection and crack bridging and that appeared to be the principal strengthening mechanism in the alumina-glass composites.


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