在钛基合金表面水热电化学沉积羟基磷灰石涂层

发布时间：2018-04-17 00:29

本文选题：金属材料 + TiAlV　；参考：《材料研究学报》2016年10期

【摘要】：在Ca~(2+)、H_2PO_4~-和NO_3~ 离子浓度分别为0.025 mol/L、0.015 mol/L和0.1 mol/L电解液中加入2.5×10~(-4)mol/L的柠檬酸钠,采用水热电化学方法在Ti6Al4V基体表面沉积羟基磷灰石涂层,研究了柠檬酸根对羟基磷灰石(HA)涂层的物相组成、形貌及结合强度的影响以及沉积时间对HA涂层物相、形貌、结晶度、涂层厚度及结合强度的影响。结果表明:在含柠檬酸根电解液中水热电化学沉积的仍为HA涂层,与不含柠檬酸根的电解液相比,HA晶体的尺寸显著减小,涂层表面更加均匀致密,涂层与基体之间的结合强度由15.39 MPa提高到24.31 MPa;HA(002)晶面的衍射峰随着水热电化学沉积时间的增加先增强后减弱,在沉积2 h时达到最大,HA晶粒尺寸较小,涂层更为均匀致密。随着沉积时间的增加,HA涂层厚度呈非线性增加,HA涂层的结晶度和结合强度均,先增大后减小,沉积时间为2 h时结晶度和结合强度分别达到最大值为75.7%和24.31 MPa。
[Abstract]:Hydroxyapatite coatings were deposited on Ti6Al4V substrates by hydrothermal method by adding 2.5 脳 10~(-4)mol/L sodium citrate to the Ca~(2 / H2PO4- and NO3-, respectively, 0.025 mol / L 0.015 mol/L and 0.1 mol/L electrolytes, respectively.The effect of citrate on the phase composition, morphology and bonding strength of HA coating and the effect of deposition time on the phase, morphology, crystallinity, thickness and bonding strength of HA coating were studied.The results show that the HA coating is still deposited by hydrothermal electrodeposition in the electrolyte containing citric acid. Compared with the electrolyte without citric acid, the size of HA crystal decreases significantly and the coating surface is more uniform and compact.The bonding strength between the coating and the substrate was increased from 15.39 MPa to 24.31 MPA (HAG) 002) the diffraction peak of the crystal plane increased firstly and then weakened with the increase of hydrothermal electrochemical deposition time. The maximum grain size of HA was smaller and the coating was more uniform and compact after 2 h deposition.With the increase of deposition time, the crystallinity and bonding strength of HA coating increased and then decreased. The maximum values of crystallinity and bonding strength were 75.7% and 24.31 MPA, respectively, when the deposition time was 2 h.
【作者单位】：上海理工大学材料科学与工程学院;中国科学院特种无机涂层重点实验室;
【基金】：中国科学院特种无机涂层重点实验室开放课题项目KLICM-2014-11 上海市自然科学基金15ZR1428300资助~~
【分类号】：TG174.4

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