Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Surface Characterization of Anodized and Hydrothermal Treated Niobium Metal

양극산화와 열수처리한 니오비움 금속의 표면특성

  • Won Dae-Hee (Biomaterials Institute, 2M, Co., Chonbuk National University) ;
  • Kim Young-Soon (Thin Film Technology Lab, School of Chemical Engineering, Chonbuk National University) ;
  • Yoon Dong-Joo (Fostering Project Corps of Industrial-Academic Cooperation Centered University, Sunchon National University) ;
  • Lee Min-Ho (Dept. of Dental Biomaterials and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University) ;
  • Bae Tae-Sung (Dept. of Dental Biomaterials and Institute of Oral Bioscience, School of Dentistry, Chonbuk National University)
  • 원대희 (투엠 생체재료연구소) ;
  • 김영순 (전북대학교 공과대학 화학공학과 박막실험실) ;
  • 윤동주 (순천대학교 산학협력중심대학 육성사업단) ;
  • 이민호 (전북대학교 치과대학 치과생체재료학교실 및 구강생체과학연구소) ;
  • 배태성 (전북대학교 치과대학 치과생체재료학교실 및 구강생체과학연구소)
  • Published : 2005.02.01
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Abstract

This study was performed to investigate the surface properties of electrochemically oxidized pure niobium by anodic oxide and hydrothermal treatment technique. Niobium specimens of $10mm\times10mm\times1.0mm$ in dimension were polished sequentially from $\#600,\;\#800,\;\#1000$ emery paper. The surface of pure niobium sperimens was anodized in an electrolytic solution that was dissolved calcium and phosphate in water. The electrolytic voltage was set in the range of 250 V and the current density was $10mA/cm^2$. The specimen was hydrothermal treated in high-pressure steam at $300^{\circ}C$ for 2 hours using an autoclave. And all specimens were immersed in the in the Hanks' solution nth pH 7.4 at $37^{\circ}C$ for 30 days. The surface of specimen was characterized by surface roughness, scanning electron microscope(SEM), energy dispersion X-ray analysis(EDX), X-ray photoemission spectroscopy(XPS) test. The value of surface roughness was the highest in the anodized sample and $0.41{\pm}0.04\;{\mu}m$. The results of the SEM observation show that oxide layers of the multi porosity in the anodized sample were piled up on another, and hydroxyapatite crystal was precipitate from the surface of the hydrothermal treated sample. In the XPS analysis, O, Nb, C peak and small amounts of N peak were found in the polished specimens while Ca and P peak in addition to O, Nb, C and peak were observed in the hydrothermal treated sample.

Keywords

References

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