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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.6
- 수록면
- 103 - 110 (8page)
- DOI
- 10.14815/kjdm.2013.06.40.2.103
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초록· 키워드
오류제보하기
The purpose of this study was to develop a surface modification method of titanium alloys using AC-type microarc oxidation (MAO) and hydrothermal (HT) treatments. CP-Ti (Ti2), Ti-6Al-4v (Ti64), and Ti-6Al-7Nb (Ti67) metals were used for this study. Disk-shaped as-received metals were wet ground with up to 1200 grit SiC paper, and those were microarc oxidized using AC-type high power supply in electrolyte containing 0.02M β-g1ycerophosphoric acid disodium salt pentahydrate (β-GP) and 0.2M calcium acetate monohydrate for 120 s. Frequency, duty ratio and maximum voltage of AC type-rectangular electric pulses was 500 ㎐, 70% and 200 V, respectively. The MAO-treated groups were hydrothermally treated in alkaline aqueous solution (pH 11.5) containing 0.002M β-GP at 190 ℃ for 8 hours. Surface morphology, chemical compositions, and crystalline structure of oxide films were examined by scanning electron microscopy, X-ray diffractometer, and energy dispersive X-ray analyzer. A porous surface with homogeneously distributed pores approximately 1 ㎛ dia was observed for Ti2-MAO group, and particular structures and variously sized pores under 1 ㎛ dia were observed for Ti64-MAO and Ti67-MAO groups. An anatase TiO₂ (ATO) structure was dominant for Ti2-MAO groups while rutile TiO₂ (RTO) and CaTiO₃ (CTO) structures were observed for Ti64-MAO and Ti67-MAO groups. After HT-treatment, hydroxyapatite (HAp) crystalline structure was observed for all groups. Nanorods were observed on the porous surface and ATO XRD peak intensity increased for HT-treated specimens. On contrary to the formation of only TiO₂ by DC-type MAO treatment, CTO crystallites were concurrently formed by AC-type MAO technique. The RTO crystallites were transformed to ATO, and CTO crystallites were converted to HAp and ATO by HT-treatment. This study showed that the oxide films on titanium alloys fabricated by MAO technique and HT treatment had the desirable properties for improved bioactivity, such as having porous surface and nano-sized HA crystalline particles. Therefore, it could be used as a promising surface modification method for developing titanium implant.
목차
ABSTRACT
서론
재료 및 방법
결과 및 고찰
결론
참고문헌
참고문헌 (22)
참고문헌 신청
1. [학술지(정기간행물)] - Albrektsson T / 1984 / The response of bone to titanium implants / CRC Critical Reviews in Biocompatibility 1 : 54 ~
2. [학술지(정기간행물)] - Babbush CA / 1986 / Titanium plasma-sprayed (TPS) screw implants for the reconstruction of the edentulous mandible / J Oral Maxillofac Surg 44 (4) : 274 ~ 282
3. [학술지(정기간행물)] - Ducheyne P / 1988 / The effect of plasmasprayed calcium phosphate ceramic coating on then metal ion release from porous titanium and cobalt-chromium alloy / J Biomed Mater Res 22 (12) : 1137 ~ 1163
4. [학술지(정기간행물)] - Fini M / 1999 / In vitro and in vivo behaviour of Ca- and P-enriched anodized titanium / Biomaterials 20 (17) : 1587 ~ 1594
5. [학술지(정기간행물)] - Gaggl A / 2000 / Scanning electron microscopical analysis of lasertreated titanium implant surfaces-a comparative study / Biomaterials 21 (10) : 1067 ~ 1073
2. [학술지(정기간행물)] - Babbush CA / 1986 / Titanium plasma-sprayed (TPS) screw implants for the reconstruction of the edentulous mandible / J Oral Maxillofac Surg 44 (4) : 274 ~ 282
3. [학술지(정기간행물)] - Ducheyne P / 1988 / The effect of plasmasprayed calcium phosphate ceramic coating on then metal ion release from porous titanium and cobalt-chromium alloy / J Biomed Mater Res 22 (12) : 1137 ~ 1163
4. [학술지(정기간행물)] - Fini M / 1999 / In vitro and in vivo behaviour of Ca- and P-enriched anodized titanium / Biomaterials 20 (17) : 1587 ~ 1594
5. [학술지(정기간행물)] - Gaggl A / 2000 / Scanning electron microscopical analysis of lasertreated titanium implant surfaces-a comparative study / Biomaterials 21 (10) : 1067 ~ 1073
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