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양극산화와 열수처리한 Ti-6Al-7Nb 합금의 표면 특성

Surface Characteristics of Anodized and Hydrothermally-Treated Ti-6Al-7Nb Alloy

송광엽|김문영|배태성
대한턱관절교합학회 (Korean academy of stomatognathic function and occlusion)|2005.06|구강회복응용과학지 (Journal of Dental Rehabilitation and Applied Science)|제21권 제1호|pp. 33-42

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주제분류치의학

초록

Abstract

This study was performed to investigate the surface properties and in vitro biocompatibility of electrochemically oxidized Ti-6Al-7Nb alloy by anodic spark discharge technique. Discs of Ti-6Al-7Nb alloy of 20 ㎜ in diameter and 2 ㎜ in thickness were polished sequentially from #300 to 1000 SiC paper, ultrasonically washed with acetone and distilled water for 5 min, and dried in an oven at 50℃ for 24 hours. Anodizing was performed using a regulated DC power supply. The applied voltages were given at 240, 280, 320, and 360 V and current density of 30 ㎃/㎠. Hydrothermal treatment was conducted by high pressure steam at 300℃ for 2 hours using a autoclave. Samples were soaked in the Hanks' solution with pH 7.4 at 36.5℃ during 30 days. The results obtained were summarized as follows; 1. The oxide films were porous with pore size of 1～5 ㎛. The size of micropores increased with increasing the spark forming voltage. 2. The main crystal structure of the anodic oxide film was anatase type as analyzed with thin-film X-ray diffractometery. 3. Needle-like hydroxyapatite (HA) crystals were observed on anodic oxide films after hydrothermal treatment at 300℃ for 2 hours. The precipitation of HA crystals was accelerated with increasing the spark forming voltage. 4. The precipitation of the fine asperity-like HA crystals were observed after being immersed in Hanks‘ solution at 37℃. The precipitation of HA crystals was accelerated with increasing the spark forming voltage and the time of immersion in Hanks' solution. 5. The Ca/P ratio of the precipitated HA layer was equivalent to that of HA crystal as increasing the spark forming voltage and the time of immersion in Hanks' solution.

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양극산화와 열수처리한 Ti-6Al-7Nb 합금의표면특성김문영, 배태성, 송광엽대한턱관절교합학회 · 구강회복응용과학지2006 · 제22권 제1호전해질 농도가 양극산화에 열수처리한 Ti-6AI-7Nb 합금의 표면 특성에 미치는 영향배태성, 송광엽, 장태엽대한치과보철학회 · 대한치과보철학회지2005 · 제43권 제5호Nb이 첨가된 Ti합금의 미세 조직 및 산화 거동김수학, 박범수, 윤계림, 이경구, 이광민, 이도재, 전충극한국표면공학회 · 한국표면공학회지2004 · 제37권 제1호Ti-8wt.Ta-3wt.Nb합금의 산화특성 및 생체안정성박범수, 박상원, 이경구, 이광민, 이도재한국표면공학회 · 한국표면공학회지2006 · 제39권 제1호양극산화에 의한 티타늄 산화막의 표면 특성 및 생체 활성에 관한 연구이상한, 조인호대한치과보철학회 · 대한치과보철학회지2007 · 제45권 제1호Surface characteristics of anodic oxidized titanium according to the pore size김명주, 김창회, 임영준, 하헌석대한치과보철학회 · 대한치과보철학회지2006 · 제44권 제3호

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