选择磷酸盐为主要成分的复合电解液体系,用微弧氧化方法对3种常用的商业铝合金物陶瓷膜分别用扫描电镜、能谱仪、X射线衍射等探讨了铝合金中元素Mg对陶瓷层的组织形貌、元素分布和相组成的调制作用,并借助硬度、摩擦磨损测试评价了膜层的性能。结果表明膜的相结构主要为γ-Al2O3,α-Al2O3和AlPO4,并含有少量Mg、Cu、Zn、W元素;随着Mg含量的增加表面组织更加细密,膜层中大尺寸缺陷减少;膜层中α-Al2O3含量随Mg含量的增加逐渐减少,当Mg含量接近2.5%时,膜层中只剩下γ-Al2O3;硬度与摩擦磨损测试显示Mg含量的增加导致硬度和耐磨性能下降。
Ceramic coatings were fabricated on three aluminum alloy substrates by micro-arc oxidation（MAO）at the constant current density of 10A/dm2 in Na3PO4 solution.The microstructure,composition,phase constituent of the coatings were investigated by means of SEM,EDS and XRD;the protective properties of the coatings were evaluated by hardness,friction and wear.The results showed that,the coatings were mainly composed of γ-Al2O3,α-Al2O3,AlPO4,and a few alloying elements such as Mg,Cu,Zn,W;the large-diameter bugs of the coatings decreases with increasing the content of Mg,and the coatings become more smooth and denser;with the increases of the content of Mg,the content of α-Al2O3 decreases,the hardness and wear of coating decreases too,when Mg content ≥2.5wt% only the γ-Al2O3.
参考文献
| [1] | 潘明强,迟关心,韦东波,狄士春.我国铝/镁合金微弧氧化技术的研究及应用现状[J].材料保护,2010(04):10-14. |
| [2] | 段关文,高晓菊,满红,张武,姜光华,李金富.微弧氧化研究进展[J].兵器材料科学与工程,2010(05):102-106. |
| [3] | 陈妍君,冯长杰,邵志松,王春霞,周雅.铝合金微弧氧化技术的研究进展[J].材料导报,2010(09):132-136. |
| [4] | Srivatsan TS.;Verraraghavan D.;Vasudevan VK.;Sriram S. .MICROSTRUCTURE, TENSILE DEFORMATION AND FRACTURE BEHAVIOUR OF ALUMINIUM ALLOY 7055[J].Journal of Materials Science,1997(11):2883-2894. |
| [5] | 慕伟意,憨勇.三种不同电解液中镁微弧氧化膜研究[J].稀有金属材料与工程,2010(07):1129-1134. |
| [6] | 王欢,刘向东,张雅萍,乌迪,陈伟东,李元涛.含Ce（SO4）2电解液体系中所形成AZ91D微弧氧化膜层的表征[J].陶瓷学报,2010(01):37-41. |
| [7] | 徐桂东,沈丽如,李炯.直流和直流脉冲电源对镁合金微弧氧化膜层性能的影响[J].材料保护,2007(06):42-44. |
| [8] | 郭洪飞,安茂忠,徐莘,霍慧彬.电流密度对镁合金微弧氧化过程及氧化陶瓷膜性能的影响[J].稀有金属材料与工程,2005(10):1554-1557. |
| [9] | 李忠盛,吴护林,潘复生,张隆平,何庆兵.氧化时间对7A55铝合金微弧氧化膜的影响[J].航空材料学报,2009(03):23-26. |
| [10] | 罗胜联,周海晖,陈金华,旷亚非.ZL系列铸铝合金的微弧氧化[J].中国有色金属学报,2002(03):491-495. |
| [11] | 胡正前,龚建飞,马晋,Чернега С М,Лоскутов В Ф.ZL109铸造铝合金微弧氧化特性研究[J].热加工工艺,2005(07):1-2. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%