Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Processing and Properties of 30 wt% β-Tricalcium Phosphate/Al2O3 Composites

30 wt% β-Tricalcium Phosphate/Al2O3 복합재료의 제조 및 특성

  • Jeong, Heecheol (School of Materials Science and Engineering, Andong National University) ;
  • Ha, Jung-Soo (School of Materials Science and Engineering, Andong National University)
  • 정희철 (안동대학교 신소재공학부) ;
  • 하정수 (안동대학교 신소재공학부)
  • Received : 2018.01.26
  • Accepted : 2018.02.06
  • Published : 2018.03.27
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Abstract

${\beta}-Tricalcium$ phosphate (TCP) was added to $Al_2O_3$ to make a biomaterial with good mechanical properties. Using a TCP powder synthesized by a polymer complexation method, $Al_2O_3$ composites containing 30 wt% TCP were fabricated and characterized for densification, phase, microstructure, strength, and fracture toughness. With optimizing the powder preparation conditions, a high densification of 97 % was obtained by sintering at $1350^{\circ}C$ for 2 h. No reaction between the two components occurred and there was no transition to ${\alpha}-TCP$. TCP grains with a size of $2-4{\mu}m$ were well surrounded by $Al_2O_3$ grains with a size of $1{\mu}m$ or less. Strength 61(Brazilian) or 187(3-p MOR) MPa, and fracture toughness 1.7 (notched beam) or 2.5 (indentation) $MPa{\cdot}m^{1/2}$ were obtained, which are large improvements over the strength of $TCP/Al_2O_3$ composites and toughness of TCP and hydroxyapatite in previous studies.

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References

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