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電解液Ca/P比對微弧氧化鈦合金涂層結(jié)構(gòu)及性能的影響
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作者單位:

1.長安大學材料科學與工程;2.西安賽特思邁鈦業(yè)有限公司

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基金項目:

中央高?；究蒲袑ｍ椯Y金(300102311401)；陜西省重點研發(fā)計劃一般項目(2021GY-207)；長安大學創(chuàng)新創(chuàng)業(yè)培訓計劃資助項目(202110710089, S202110710317)


Influence of electrolyte Ca/P ratio on microstructure and properties of micro-arc oxidation titanium alloy coatings
Author:
Affiliation:

1.School of Materials Science and Engineering,Chang’an University,Xi’an;2.Xi’an Saite Simai Titanium Industry Co,Ltd,Xi’an

Fund Project:

Project(300102311401) supported by the Fundamental Research Funds for the Central Universities, China; Project(2021GY-207) supported by General projects of Shaanxi Provincial Key Research and Development Program, China; Project (No. 202110710089, S202110710317) supported by the Innovation and Entrepreneurship Training Program of Chang’ an University, China

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    摘要:

    本文采用微弧氧化技術(shù)在Ti-13Nb-13Zr合金表面制備HA/TiO2復合涂層。通過改變電解液中Ca/P比值，研究不同Ca/P比對微弧氧化涂層的相組成及組織變化，以及對耐磨性、耐蝕性與體外生物活性的影響。 結(jié)果表明： 隨著電解液Ca/P比增大，涂層粗糙度及孔隙率增大。涂層相組成以銳鈦礦及金紅石為主，金紅石相含量隨著電解液Ca/P比增大而增大。乙酸鈣含量為35g/L的電解液制備的CA35涂層厚度達80.59 μm，表面Ca/P比為1.98，表現(xiàn)出最好的耐磨耐蝕性能。與基體相比，CA35涂層平均摩擦系數(shù)約為0.19，下降了43%。采用Pt參比電極和0.9 wt% NaCl測試溶液對涂層的耐蝕性進行檢測。CA35涂層的腐蝕電流密度為4.94 μA/cm2，腐蝕電位為-221.71 mV。CA35涂層在Kokubo 溶液中產(chǎn)生礦化產(chǎn)物的速度最快。 研究發(fā)現(xiàn)適當提高電解液Ca/P比能有效促進HA的形成，提高涂層的耐磨耐蝕性能，過高的Ca/P比會導致涂層性能下降。此外，本文對Ca/P比對涂層性能的影響機理進行了探討。

    Abstract:

    HA/TiO2 composite coatings were prepared on Ti-13Nb-13Zr alloy by micro-arc oxidation. By changing the Ratio of Ca/P in the electrolyte, the phase composition and microstructure changes, as well as the effects of different Ca/P ratios on the wear resistance, corrosion resistance and in vitro biological activity of micro-arc oxidation coating were studied. The results show that the coating roughness and porosity increase with the increase of electrolyte Ca/P ratio. The coating phase is mainly composed of anatase and rutile, and the rutile phase content increases with the increase of Ca/P ratio of electrolyte. The coating thickness of CA35 prepared with 35g/L calcium acetate electrolyte is 80.59 μm and the surface Ca/P ratio is 1.98, showing the best wear and corrosion resistance. Compared with the substrate, the average friction coefficient of CA35 coating is about 0.19, which decreases by 43%. The corrosion resistance of the coating was tested by Pt reference electrode and 0.9 wt % NaCl test solution. The corrosion current density of CA35 coating is 4.94 μA/cm2, and the corrosion potential is -221.71 mV. The CA35 coating produced the fastest mineralized products in Kokubo solution. It is proved that increasing the Ca/P ratio of electrolyte can effectively promote the formation of HA and improve the wear resistance. In addition, the influence mechanism of Ca/P ratio on coating properties was discussed.

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徐義庫,羅宇晴,蔣建麗,陳永楠,趙秦陽,郝建民,楊曉康,羅斌莉.電解液Ca/P比對微弧氧化鈦合金涂層結(jié)構(gòu)及性能的影響[J].稀有金屬材料與工程,2023,52(2):675~684.[Yiku Xu, Yuqing Luo, Jianli Jiang, Yongnan Chen, Qinyang Zhao, Jianmin Hao, Xiaokang Yang, Binli Luo. Influence of electrolyte Ca/P ratio on microstructure and properties of micro-arc oxidation titanium alloy coatings[J]. Rare Metal Materials and Engineering,2023,52(2):675~684.]
DOI：10.12442/j. issn.1002-185X.20220058

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  • 收稿日期:2022-01-20
  • 最后修改日期:2022-04-24
  • 錄用日期:2022-04-25
  • 在線發(fā)布日期: 2023-03-09
  • 出版日期: 2023-02-28