2處理后使其表面改性,用電化學(xué)沉積法在其表面制備了Ca-P涂層。通過SEM、EDS、XRD和FTIR分析了涂層的形貌、化學(xué)成分和相組成。結(jié)果表明：經(jīng)HF酸處理后,鎂合金表面形成具有微孔的氟轉(zhuǎn)化層,氟轉(zhuǎn)化層在Ca(OH)2溶液浸泡后形成具有微納米孔隙的CaF2層；相比于未經(jīng)Ca(OH)2處理的氟轉(zhuǎn)化膜表面,具有微納米孔隙的富鈣層更有利于誘導(dǎo)含磷基團(tuán)和鈣離子的形核,電化學(xué)沉積所得的Ca-P涂層更致密均勻,晶體結(jié)晶更完整；電化學(xué)沉積后的涂層由長約70 μm、寬約30 μm的片狀透鈣磷石(DCPD,CaHPO4.2H2O)晶體組成,堿熱處理后涂層表面形成大量絨毛狀物質(zhì),DCPD轉(zhuǎn)變?yōu)镠A,HA涂層也是由呈花簇狀生長的片狀晶體構(gòu)成。"/>

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氟處理的鎂合金表面電化學(xué)沉積Ca-P涂層的研究
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重慶理工大學(xué) 材料科學(xué)與工程學(xué)院,重慶理工大學(xué) 材料科學(xué)與工程學(xué)院,重慶理工大學(xué) 材料科學(xué)與工程學(xué)院,重慶理工大學(xué) 材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金資助(項(xiàng)目號51201192 )


Calcium phosphate coatings prepared by electrochemical deposition on fluoride-treated magnesium alloy
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School of Materials Science Engineering,Chongqing University of Technology,School of Materials Science Engineering,Chongqing University of Technology,School of Materials Science Engineering,Chongqing University of Technology,School of Materials Science Engineering,Chongqing University of Technology

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    摘要:

    為改善鎂合金的耐蝕性和生物相容性,本實(shí)驗(yàn)以氟處理的AZ31鎂合金為基體,通過Ca(OH)2處理后使其表面改性,用電化學(xué)沉積法在其表面制備了Ca-P涂層。通過SEM、EDS、XRD和FTIR分析了涂層的形貌、化學(xué)成分和相組成。結(jié)果表明：經(jīng)HF酸處理后,鎂合金表面形成具有微孔的氟轉(zhuǎn)化層,氟轉(zhuǎn)化層在Ca(OH)2溶液浸泡后形成具有微納米孔隙的CaF2層；相比于未經(jīng)Ca(OH)2處理的氟轉(zhuǎn)化膜表面,具有微納米孔隙的富鈣層更有利于誘導(dǎo)含磷基團(tuán)和鈣離子的形核,電化學(xué)沉積所得的Ca-P涂層更致密均勻,晶體結(jié)晶更完整；電化學(xué)沉積后的涂層由長約70 μm、寬約30 μm的片狀透鈣磷石(DCPD,CaHPO4.2H2O)晶體組成,堿熱處理后涂層表面形成大量絨毛狀物質(zhì),DCPD轉(zhuǎn)變?yōu)镠A,HA涂層也是由呈花簇狀生長的片狀晶體構(gòu)成。

    Abstract:

    To improve the corrosion resistance and biocompatibility of magnesium alloys, Ca-P coatings were fabricated on the fluoride-treated AZ31 magnesium by way of electrochemical deposition. Before the electrochemical deposition, the fluoride-treated AZ31 magnesium was immersed in Ca(OH)2 solution to modified the surfaceSofSfluoride conversion film . The morphology, composition and structure of the samples were investigated by SEM, EDS, XRD and FTIR, respectively. The results showed that the MgF2 conversion film with micro-pores was formed on AZ31 alloy through the fluoride treatment. After soaking in Ca(OH)2, CaF2 film with miicro/nano pores was formed on the fluoride-treated surface, which is advantageous toStheSnucleation of calcium phosphate. The Ca-P coating deposited on Ca(OH)2-immersioned sample was more uniform and compact than the untreated one. The coating was composed of flake-like crystals of brushite (DCPD,CaHPO4.2H2O) with about 70 μm length and 30μm width and converted to hydroxyapatite(HA ) coating which was covered bySvillous deposition after alkaline-heat treatment.

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張春艷,蔡春瑞,柳歆鵬,王佳.氟處理的鎂合金表面電化學(xué)沉積Ca-P涂層的研究[J].稀有金屬材料與工程,2016,45(8):2116~2122.[Zhang Chunyan, Cai Chunrui, Liu Xinpeng, Yang Mingbo. Calcium phosphate coatings prepared by electrochemical deposition on fluoride-treated magnesium alloy[J]. Rare Metal Materials and Engineering,2016,45(8):2116~2122.]
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  • 收稿日期:2015-09-12
  • 最后修改日期:2015-11-07
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-10-09
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