Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effects of Surface Modification on Biomimetic Deposition of Apatite in Zr-1Nb

표면변환이 Zr-1Nb합금의 아파타이트 석출에 미치는 효과

  • Kim, Tae Ho (SeAH Besteel Corp.) ;
  • Cho, Kyu Jin (Department of Advanced Materials Engineering, Chungnam National University) ;
  • Hong, Sun Ig (Department of Advanced Materials Engineering, Chungnam National University)
  • 김태호 (세아베스틸 품질보증팀) ;
  • 조규진 (충남대학교 신소재공학과) ;
  • 홍순익 (충남대학교 신소재공학과)
  • Received : 2009.12.02
  • Published : 2010.06.22
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Abstract

Effects of the surface modification on the deposition behaviors of apatite crystals in Zr-1Nb plates were studied. Zr-1Nb alloy plates were polished with abrasive papers to have different roughness and some of them were treated in NaOH or coated with collagen before deposition of apatites in the simulated body fluid (SBF). The weight gain due to the deposition of apatite crystals increased as the surface roughness increased in Zr-1Nb. The size of granular apatite crystals were found to be smaller in Zr-1Nb roughened by $162{\mu}m$ abrasive paper than in Zr-1Nb roughened by $8.4{\mu}m$ paper, suggesting the nucleation rate increased with increase of surface roughness. After, 10 days immersion in a SBF, NaOH-treated Zr-1Nb was completely coated with apatite with the deposited apatite weight comparable to that in Ti-6Al-4V. The deposition rate of Zr-1Nb was not appreciably influenced by NaOH treatment unlike the significant influence of NaOHtreatment on the deposition rate of apatite in Ti-6Al-4V. One significant observation in this study is an appreciable increase of the apatite deposition rate after collagen coating both on Zr-1Nb and Ti-6Al-4V plate, which may be caused by the interaction between collagen and $Ca^{+2}$ ions.

Keywords

Acknowledgement

Supported by : 한국과학재단

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