한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제52권5호
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  • Pages.374-379
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  • 2015
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Fabrication and Characterization of Hydroxyapatite/Mullite and Tricalcium Phosphate/Al2O3 Composites Containing 30 wt% of Bioactive Components

  • Ha, Jung-Soo (School of Materials Science and Engineering, Andong National University)
  • 투고 : 2015.06.29
  • 심사 : 2015.08.17
  • 발행 : 2015.09.30
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초록

Mullite-matrix and $Al_2O_3$-matrix composites were fabricated with 30 wt% hydroxyapatite (HA) and tricalcium phosphate (TCP), respectively, as additives to give bioactivity. A diphasic gel process was employed to lower the densification temperature of the mullite matrix to $1320^{\circ}C$. A polymer complexation process was used to synthesize a TCP powder that was fully densified at $1250^{\circ}C$, for application to the matrix. For the HA/mullite composite, HA decomposed during sintering by reactions with the matrix components of $Al_2O_3$ and $SiO_2$, resulting in a mixture of $Al_2O_3$, TCP, and other minor phases with a low densification of less than 88% of the theoretical density (TD). In contrast, the TCP/$Al_2O_3$ composite was highly densified by sintering at $1350^{\circ}C$ to 96%TD with no reaction between the components. Different from the TCP monolith, the TCP/$Al_2O_3$ composite also showed a fine microstructure and intergranular fracture, both of which characteristics are advantageous for strength and fracture toughness.

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참고문헌

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피인용 문헌

  1. Processing and Properties of 30 wt% β-Tricalcium Phosphate/Al2O3 Composites vol.28, pp.3, 2018, https://doi.org/10.3740/MRSK.2018.28.3.142
  2. Hydroxyapatite와 Al2O3 혼합분말의 상압소결에 의한 TCP/Al2O3 및 Fluorapatite/Al2O3 복합재료의 In-Situ 제조 vol.29, pp.2, 2015, https://doi.org/10.3740/mrsk.2019.29.2.129
  3. The effect of alumina additive and sintering temperature on the microstructural, physical, mechanical, and bioactivity properties of hydroxyapatite-alumina composites vol.56, pp.2, 2015, https://doi.org/10.1007/s41779-019-00345-3