| 镁合金微弧氧化Na2CO3诱导析气反应及结构调制 |
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| 引用本文： | 王晓波,田修波,巩春志,杨士勤.镁合金微弧氧化Na2CO3诱导析气反应及结构调制[J].无机材料学报,2011(7):721-725. |
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| 作者姓名： | 王晓波 田修波 巩春志 杨士勤 |
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| 作者单位： | 哈尔滨工业大学现代焊接生产技术国家重点实验室; |
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| 基金项目： | 国家自然科学基金(10775036)~~ |
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| 摘 要： | 阳极析气能够有效调制微弧氧化膜层表面形貌.实验提出了一种CO2增强析气的方法.在Na3PO4+KOH+NaF溶液中添加Na2CO3对AZ31镁合金表面进行微弧氧化处理.利用气相质谱、扫描电镜、X射线衍射、红外光谱扫描探讨了Na2CO3添加剂对阳极区析气反应的影响和对膜层形貌、结构的调制作用.结果表明:与传统微弧氧化不同,添加Na2CO3之后,阳极区产生的气体既有O2也有CO2.在含Na2CO3的电解液中,微弧氧化前期的阳极氧化阶段有MgCO3生成;在微弧氧化后期,膜层中不含有MgCO3,膜层主要相仍为MgO相.对比发现,经过Na2CO3调制之后的膜层表面大尺寸孔隙数目减少,膜层孔隙率提高.
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| 关 键 词： | 微弧氧化 析气 镁合金 Na2CO3 调制作用 |
Na_2CO_3-induced Gas Evolution Reaction and Morphology Modulation on Magnesium Alloy during Micro-arc Oxidation |
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| WANG Xiao-Bo,TIAN Xiu-Bo,GONG Chun-Zhi,YANG Shi-Qin.Na_2CO_3-induced Gas Evolution Reaction and Morphology Modulation on Magnesium Alloy during Micro-arc Oxidation[J].Journal of Inorganic Materials,2011(7):721-725. |
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| Authors: | WANG Xiao-Bo TIAN Xiu-Bo GONG Chun-Zhi YANG Shi-Qin |
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| Affiliation: | WANG Xiao-Bo,TIAN Xiu-Bo,GONG Chun-Zhi,YANG Shi-Qin(State Key Laboratory of Advanced Welding Production and Technology,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | Surface morphology of the ceramic coatings can be modulated by gas evolution on anodes during micro arc oxidation(MAO) processes.A novel technique to enhance gas evolution using Na2CO3-containing solution was proposed.MAO ceramic coatings were fabricated on AZ31 magnesium alloy using Na2CO3 as a special additive in Na3PO4+KOH +NaF base electrolyte.The effects of Na2CO3 addition on the reaction of gas evolution near the an-ode,morphology modulation and chemical composition were investigated by using GC-MS,SE... |
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| Keywords: | micro-arc oxidation gas evolution magnesium alloy sodium carbonate modulation effect |
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