以微弧氧化后的钛合金为基体,采用水热电化学法制备了 HA/TiO 2涂层.利用 SEM、XRD 对涂层的表面形貌、物相组成进行了表征分析,通过 pH 微探针原位探测电极/电解液界面 pH 值的变化,研究了pH 值和缓冲剂对水热电化学沉积 HA/TiO 2涂层的影响.研究结果表明,微弧氧化膜有利于水热电化学沉积 HA,得到的 HA 晶体分布均匀、致密.当电解液pH 值在2~8时,pH 值升高有利于提高水热电化学沉积 HA 的结晶度,并促使 HA 沿(002)晶面生长.在水热电化学沉积 HA 过程中,电极表面的 pH 值随沉积时间的增加先升高后逐渐降低；而溶液中的 pH值随沉积时间的增加逐渐降低.pH 值和缓冲剂对涂层 HA 晶体形貌有明显影响,加入缓冲剂后得到的HA 晶体端面呈六边形棒状结构,晶体表面光滑、结晶完整.
Using titanium alloy after micro-arc oxidation as substrate,HA/TiO 2 coatings were prepared by hy-drothermal-electrochemical method.The morphologies and phase compositions of coatings were characterized by means of SEM and XRD,and the variation of pH value of electrode/electrolyte was measured by means of pH microprobe;in this way,the influences of pH value and slow granule on HA/TiO 2 coatings deposited by hydro-thermal-electrochemical method were investigated.The results show that micro-arc oxidation coatings contrib-ute to HA deposited by hydrothermal-electrochemical method and HA crystals are well-distributed and densified in the coatings.When the pH value was within the range of 2 to 8,the increasing of the pH value contributes to HA crystals with high crystallinity and the growth of HA along the crystallographic plane (002).During the process of depositing HA by hydrothermal-electrochemical method ,pH value on the surface of electrode increa-ses at first and then decreases with the deposition time,while pH value of electrolyte decreases with the deposi-tion time.pH value and slow granule have obvious influences on the morphologies of HA crystals.HA crystals prepared in the electrolyte containing slow granule are rods in shape,the edge face of rod was a defined flat hex-agon and the surface of the crystal was smooth,and HA crystals are well-crystallized.
参考文献
| [1] | 孙敬,崔振铎,朱胜利,杨贤金.生物医用植入钛及钛合金的力学性能研究及进展[J].金属热处理,2005(09):59-62. |
| [2] | De Groot K;Geesink R;Kein C P A T et al.[J].Journal of Biomedical Materials Research,1987,21:1375-1382. |
| [3] | 赵冰,杜荣归,林昌健.羟基磷灰石生物陶瓷材料的制备及其新进展[J].功能材料,2003(02):126-129,132. |
| [4] | 梁芳慧,周廉.钛和钛合金生物活化研究现状[J].稀有金属材料与工程,2003(04):241-245. |
| [5] | Chan C A N;CheungK H;Ong J et al.Is HA coating be-nefical[J].Chinese Journal of Oral Implantology,1998,3(01):45-48. |
| [6] | Kajiyoshi K;Ishizawa N;Yoshimura M .Preparation of tetrageonal barium titanate thin film on titanium metal substrate by hydrothermal method[J].Am Ceram Soc,1991,74(02):369-374. |
| [7] | Ban SJ.;Maruno S. .EFFECT OF TEMPERATURE ON ELECTROCHEMICAL DEPOSITION OF CALCIUM PHOSPHATE COATINGS IN A SIMULATED BODY FLUID[J].Biomaterials,1995(13):977-981. |
| [8] | Ban S;Maruno S;Harada A et al.Effect of temperature on morphology of calcium phosphates deposited by elec-trochemical method[J].Dental Materials Journal,1996,15:31-38. |
| [9] | Ban S;Maruno S .Morphology and microstructure of electrochemically deposited calcium phosphates in a modified simulated body fluid.[J].Biomaterials,1998(14):1245-1253. |
| [10] | Liu F;Li Z Y;Zhou K C et al.Preparation of HA coat-ing in low Ca/P ratio solution by electro deposition[J].J Cent Southuniv Technol,2002,33(01):66-69. |
| [11] | 刘芳,周科朝,黄伯云,刘咏,李志友.电沉积-水热合成法制备羟基磷灰石生物陶瓷涂层[J].材料导报,2002(03):38-40. |
| [12] | Kajiyoshi K;Ishizawa N;Yoshimura M .Preparation of tetrageonal barium titanate thin film on titanium metal substrate by hydrothermal method[J].Journal of the American Ceramic Society,1991,74(02):369-374. |
| [13] | Chen Z Q.Biodental material science[M].Shanghai:Peo-ple's Medical Publishing House,2004 |
| [14] | 马威,时惠英,刘宝林,魏建华,封兴华.成骨细胞在微弧氧化处理后纯钛表面的附着、增殖及ALP活性[J].实用口腔医学杂志,2005(01):106-110. |
| [15] | Burke L D;Mulcahy J K;Whelan D P .Preparation of an oxidized iridium electrode and the variation of its poten-tial with pH[J].Journal of Electroanalytical Chemistry,1984,163:117-128. |
| [16] | J. M. Zhang;C. J. Lin;Z. D. Feng;Z. W. Tian .Mechanistic studies of electrodeposition for bioceramic coatings of calcium phosphates by an in situ pH-microsensor technique[J].Journal of Electroanalytical Chemistry: An International Journal Devoted to All Aspects of Electrode Kinetics, Interfacial Structure, Properties of Electrolytes, Colloid and Biological Electrochemistry,1998(2):235-240. |
| [17] | 张建民,杨长春,石秋芝,吴强,程鹏里.电极/溶液界面pH值的现场测量[J].高等学校化学学报,2001(11):1901-1903. |
| [18] | 王迎军,宁成云,赵子衷,陈楷,刘正义,马利泰,冯景伟,黄瑞福.生物活性梯度涂层中羟基磷灰石的相转变与结构稳定性[J].硅酸盐学报,1998(05):656-661. |
| [19] | Chu C L;Zhu J C;Yin Z D et al.Hot pressing of hy-droxyl-apatite(HA)-Ti material and stability of HA[J].Transactions of Nonferrous Metals Society of China,2000,10(04):505-508. |
| [20] | Elliot J C.Structure and chemistry of apatites and other calcium orthoposphates[M].Amsterdam:Elsevier Sci-ence Publishers,1994:157. |
| [21] | Han Y.;Hong SH.;Xu KW. .Structure and in vitro bioactivity of titania-based films by micro-arc oxidation[J].Surface & Coatings Technology,2003(2/3):249-258. |
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