Si Zhiwei*,Yin Zhengyu,Liu Yue,et al.Effect of Er ( NO 3 ) 3 addition on wear resistance of pure magnesium micro-arc oxide film layer[J].Plating & Finishing,2024,(3):59-65.[doi:10.3969/j.issn.1001-3849.2024.03.009]
稀土盐Er（NO3）3掺杂对纯镁微弧氧化膜层耐磨性的影响
- Title:
- Effect of Er ( NO 3 ) 3 addition on wear resistance of pure magnesium micro-arc oxide film layer
- Keywords:
- pure magnesium ; micro-arc oxidation ; rare earth salt ; abrasion resistance
- 分类号:
- TQ153.6
- 文献标志码:
- A
- 摘要:
- 针对纯镁耐磨性较差这一问题，通过微弧氧化（ MAO ）技术在 Na 2 SiO 3 -C 10 H 14 N 2 Na 2 O 8 电解液中对纯镁进行表面改性处理，旨在提高镁的耐磨性。在电解液中添加不同量的稀土盐 Er （ NO 3 ） 3 ，研究 Er （ NO 3 ） 3 添加量对纯镁微弧氧化膜层的相组成、微观结构、显微硬度、临界载荷以及摩擦系数的影响。结果表明，电解液中未添加 Er （ NO 3 ） 3 时，膜层中主要有 Mg 、 MgO 、 Mg 2 SiO 3 和 MgF 2 相；电解液中添加 Er （ NO 3 ） 3 后，膜层中检测到 Er 2 O 3 相。电解液中添加稀土盐 Er （ NO 3 ） 3 后，膜层表面的孔洞直径减小，当稀土盐 Er （ NO 3 ） 3 的添加量超过 2.85 g/L 时，膜层表面出现明显的裂纹。在电解液中添加稀土盐 Er （ NO 3 ） 3 后，经 MAO 处理得到膜层的显微硬度均高于未添加稀土盐 Er （ NO 3 ） 3 ，当稀土盐 Er （ NO 3 ） 3 的添加量为 2.85 g/L 时，膜层的显微硬度值最大，约为 185.8±7.1 HV 。膜层的临界载荷及摩擦系数随稀土盐 Er （ NO 3 ） 3 添加量的增加呈现先增加后减小的趋势，在稀土盐 Er （ NO 3 ） 3 的添加量为 2.85 g/L 时，膜层的临界载荷及摩擦系数分别约为 12.2±0.5 N 和 0.15 。
- Abstract:
- ： In view of the poor wear resistance of pure magnesium ， the surface modification of pure magnesium in Na 2 SiO 3 -C 10 H 14 N 2 Na 2 O 8 electrolyte by micro-arc oxidation （ MAO ） technology is carried out to improve the wear resistance of pure magnesium. Different amounts of rare earth salt Er （ NO 3 ） 3 were added to the electrolyte to study the effects of Er （ NO 3 ） 3 addition on the phase composition ， microstructure ， microhardness ， critical load and friction coefficient of pure magnesium microarc oxide layer. The results showed that when Er （ NO 3 ） 3 was not added to the electrolyte ， there were mainly Mg ， MgO ， Mg 2 SiO 3 and MgF 2 phases in the film layer ， and Er 2 O 3 phases were detected in the film layer after Er （ NO 3 ） 3 was added to the electrolyte. After the addition of rare earth salt Er （ NO 3 ） 3 to the electrolyte ， the diameter of the pores on the surface of the film layer decreased ， and when the amount of rare earth salt Er （ NO 3 ） 3 added exceeded 2.85 g/L ， obvious cracks appeared on the surface of the film layer. After adding rare earth salt Er （ NO 3 ） 3 to the electrolyte ， the microhardness of the film layer obtained by MAO treatment was higher than that of the rare earth salt Er （ NO 3 ） 3 ， and when the amount of rare earth salt Er （ NO 3 ） 3 was 2.85 g/L ， the microhardness value of the film layer was the largest ， about 185.8±7.1 HV. The critical load and friction coefficient of the film layer increased first and then decreased with the increase of rare earth salt Er （ NO 3 ） 3 ， and when the addition of rare earth salt Er （ NO 3 ） 3 was 2.85 g/L ， the critical load and friction coefficient of the film layer were about 12.2±0.5 N and 0.15.
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备注/Memo
收稿日期： 2023-10-08 修回日期： 2023-10-29 作者简介： 司志伟（ 2001 —），男，本科，主要从事电化学方面研究， email ： jmsdxsizhiwei@163.com?/html>