표면변환이 Zr-1Nb합금의 아파타이트 석출에 미치는 효과

• Published in: 대한금속·재료학회지, 48(6) pp. 575 - 580
• Main Authors: 김태호, 조규진, 홍순익
• Format: Journal Article
• Language: Korean
• Published: 대한금속·재료학회 01.06.2010
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241

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 μm abrasive paper than in Zr-1Nb roughened by 8.4 μm 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. KCI Citation Count: 0