| 镁合金微弧氧化Y2O3-ZrO2-MgO膜制备及性能 |
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| 引用本文： | 蔡启舟,刘峰,严青松,罗强.镁合金微弧氧化Y2O3-ZrO2-MgO膜制备及性能[J].华中科技大学学报(自然科学版),2011(8):27-31. |
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| 作者姓名： | 蔡启舟 刘峰 严青松 罗强 |
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| 作者单位： | 华中科技大学材料成形与模具技术国家重点实验室;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; |
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| 基金项目： | 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开放基金资助项目(gf200901002) |
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| 摘 要： | 在K2ZrF6-Y(NO3)3-NaAlO2电解液中采用微弧氧化技术在AZ91D镁合金表面制备了Y2O3-ZrO2-MgO复合膜层(Al-Zr-Y膜).运用电子显微镜(SEM)、能谱分析仪(EDS)、X射线衍射仪(XRD)和电化学分析与高温氧化等方法研究了Al-Zr-Y膜的组成与结构、耐腐蚀性及热稳定性.结果表明:Al-Zr-Y膜主要由Y2O3,ZrO2,MgO和Al2O3等物相组成,与Na2SiO3-(NaPO3)6电解液中的膜层(Si-P膜)相比,Al-Zr-Y膜的厚度较小,但膜层的致密性较好、表面粗糙度小;腐蚀电流密度较小、开路电位较正、极化阻抗较高;在5%NaCl溶液中的腐蚀速率低于Si-P膜,约为AZ91D镁合金的1%.Al-Zr-Y膜层比普通Si-P膜层具有更好的抗高温氧化性能和耐热冲击性能.
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| 关 键 词： | AZ91D镁合金 微弧氧化 Y2O3-ZrO2-MgO复合陶瓷膜 腐蚀性能 耐热性 |
Preparation and performance of Y_2O_3-ZrO_2-MgO compositecoating on magnesium alloy by microarc oxidation |
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| Cai Qizhou Liu Feng Yan Qingsong Luo Qiang.Preparation and performance of Y_2O_3-ZrO_2-MgO compositecoating on magnesium alloy by microarc oxidation[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2011(8):27-31. |
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| Authors: | Cai Qizhou Liu Feng Yan Qingsong Luo Qiang |
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| Affiliation: | Cai Qizhou1 Liu Feng1 Yan Qingsong2 Luo Qiang1(1 State Key Laboratory of Material Processing and Die and Mould Technology,Huazhong Universityof Science and Technology,Wuhan 430074,China,2 National Defense Key Disciplines Laboratory of LightAlloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,China) |
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| Abstract: | Composite ceramic coating containing Y2O3-ZrO2MgO(Al-Zr-Y) was prepared on AZ91D magnesium alloy by microarc oxidation in K2ZrF6-Y(NO3)3-NaAlO2 electrolyte.The composition and structure of the coating were studied by SEM(scanning electron microscope),EDS(energy dispersive spectrometer) and XRD(X-ray diffraction);meanwhile,the corrosion resistance and thermal stability of the coating were tested by means of potentiodynamic polarization and high temperature oxidation,etc.The results show that the composite ce... |
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| Keywords: | AZ91D magnesium alloy microarc oxidation Y2O3-ZrO2-MgO composite coating corrosion resistance thermal stability |
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