| Ti2AlNb合金微弧氧化电解液优化及耐磨性研究 |
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| 引用本文： | 刘欢欢,王帅星,刘小辉,赵晴,余丽霞,高傲,钟宏.Ti2AlNb合金微弧氧化电解液优化及耐磨性研究[J].表面技术,2018,47(1):85-91. |
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| 作者姓名： | 刘欢欢 王帅星 刘小辉 赵晴 余丽霞 高傲 钟宏 |
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| 作者单位： | 南昌航空大学材料科学与工程学院,南昌,330063;南昌航空大学材料科学与工程学院,南昌 330063;南昌航空大学轻合金加工科学与技术国防重点学科实验室,南昌 330063 |
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| 基金项目： | 轻合金加工科学与技术国防重点学科实验室开放基金（gf201501002）；江西省教育厅科学技术项目（GJJ160712）；国家自然科学基金（51361025） |
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| 摘 要： | 目的优化Ti_2AlNb合金微弧氧化的电解液配方,提高Ti_2AlNb合金微弧氧化膜的耐磨性。方法借助SEM、EDS、XRD研究硅酸盐-磷酸盐电解液体系中Na_2MoO_4浓度对Ti_2AlNb合金微弧氧化膜形貌、成分及相结构的影响。利用CFT-I型磨损试验机测试不同微弧氧化膜的摩擦磨损性能。结果电解液中添加Na_2MoO_4后,微弧氧化膜的生长速率增加,膜层中出现了Mo元素且含量也逐渐增加。Na_2MoO_4的加入降低了Ti_2AlNb合金微弧氧化膜的摩擦系数及比磨损率,但微弧氧化膜的耐磨性并非随Na_2MoO_4含量线性提高。含6 g/L Na_2MoO_4的体系中,微弧氧化膜摩擦系数低至0.25左右,比磨损率仅为1.20×10~(-3) mm~3/(N·m),表面呈轻微磨粒磨损特征。结论电解液中的Na_2MoO_4参与了成膜过程,对Ti_2AlNb合金微弧氧化膜的生长有显著的促进作用,有效地改善了Ti_2AlNb合金微弧氧化膜的耐磨性。
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| 关 键 词： | Ti2AlNb合金 微弧氧化 Na2MoO4 耐磨性 |
| 收稿时间： | 2017/5/28 0:00:00 |
| 修稿时间： | 2018/1/20 0:00:00 |
Optimization of Micro-arc Oxidation Electrolyte for Ti2AlNb Alloy and Wear Resistance of Coatings |
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| LIU Huan-huan,WANG Shuai-xing,LIU Xiao-hui,ZHAO Qing,YU Li-xi,GAO Ao and ZHONG Hong.Optimization of Micro-arc Oxidation Electrolyte for Ti2AlNb Alloy and Wear Resistance of Coatings[J].Surface Technology,2018,47(1):85-91. |
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| Authors: | LIU Huan-huan WANG Shuai-xing LIU Xiao-hui ZHAO Qing YU Li-xi GAO Ao and ZHONG Hong |
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| Affiliation: | a.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China,a.School of Materials Science and Engineering, b.National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China,a.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China,a.School of Materials Science and Engineering, b.National Defense Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China,a.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China,a.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China and a.School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China |
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| Abstract: | The work aims to optimize micro-arc oxidation (MAO) electrolyte formula for Ti2AlNb alloy and improve wear resistance of MAO coatings on Ti2AlNb alloy. Effects of Na2MoO4concentration on morphology, element composition and phase structure of MAO coatings on Ti2AlNb alloy were investigated in silicate-phosphate electrolyte system by virtue of SEM, EDS and XRD. Friction and wear properties of MAO coatings were tested with ball-disc wear tester. After the addition of Na2MoO4in the electrolyte, growth rate of MAO coatings increased, Mo element appeared on the MAO coatings and Mo con-tent increased gradually. Friction coefficient and volume wear rate of MAO coatings were reduced as Na2MoO4was added in the electrolyte. However, the wear resistance of MAO coatings did not increase linearly with the increase of Na2MoO4content.In the system with 6 g/L Na2MoO4, the friction coefficient of MAO coating reduced to nearly 0.25, and the volume wear rate was only 1.20×10?3mm3/(N·m), and the surface featured in slight abrasive wear. Na2MoO4in the electrolytes participates in the film-forming process, plays an important role in promoting growth of MAO coatings on Ti2AlNb alloy and can effectively im-prove its wear resistance. |
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| Keywords: | Ti2AlNb alloy micro-arc oxidation Na2MO4 wear resistance |
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