脉冲频率对钛合金微弧氧化膜的影响
Effect of Pulse Frequency on Titanium Alloy Micro-arc Oxidation Coating
摘 要
采用交流微弧氧化法于Na2SiO3和Na3PO4的混合溶液中,在Ti6Al4V钛合金表面制备了氧化物陶瓷膜;研究了脉冲频率对氧化膜厚度、表面形貌、物相组成和耐腐蚀性能的影响.结果表明:随着脉冲频率的增高,氧化膜的厚度逐渐减小,氧化膜表面的孔径尺寸减小,微孔数量逐渐增多;氧化膜主要由锐钛矿相和金红石相两种TiO2组成,当脉冲频率低于500 Hz时,频率对氧化膜各相含量的影响不明显;当脉冲频率超过500 Hz时,随着频率的增高,氧化膜中金红石相TiO2的含量稍有增加;表面覆盖氧化膜的Ti6Al4V钛合金在30%硫酸中的耐腐蚀性能比表面未覆盖氧化膜的有明显提高.
脉冲频率
表面形貌
耐腐蚀性能
micro-arc oxidation
pulse frequency
surface morphology
anticorrosive property
Abstract
Oxide ceramic coatings were formed on Ti6A14V alloy surface by micro-arc oxidation (MAO) treatment in the mixture solution of Na2SiO3 and Na3PO4.The influence of pulse frequency on the coating thickness,surface morphology,phase compositions and the anticorrosive property was studied.The results show that with the increase of pulse frequency,the thickness of the coatings decreased,the size of micropores reduced,the number of micropores increased.The oxide ceramic coating was composed of anatase and rutile TiO2.When the pulse frequency was lower than 500 Hz,it had slight impact on the content of rutile and anatase TiO2.While the pulse frequency was higher than 500 Hz,the rutile TiO2 content of the oxide coating slightly increased with the increase of pulse frequency,and the anticorrosive property obviously enhanced in 30% sulfuric acid solution.
中图分类号 TG174
所属栏目 新材料 新工艺
基金项目
收稿日期 2007/11/15
修改稿日期 2008/12/24
网络出版日期
作者单位点击查看
备注刘忠德(1951-),男,山西浑源人,教授.
引用该论文: LIU Zhong-de,SUN Mao-jian,XIANG Zheng-qun,ZHANG Zhong-yuan,FU Hua. Effect of Pulse Frequency on Titanium Alloy Micro-arc Oxidation Coating[J]. Materials for mechancial engineering, 2009, 33(3): 43～45
刘忠德,孙茂坚,向正群,张中元,付华. 脉冲频率对钛合金微弧氧化膜的影响[J]. 机械工程材料, 2009, 33(3): 43～45
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【5】王亚明,蒋百灵,雷廷权,等.电参数对Ti6Al4V合金微弧氧化陶瓷膜结构特性的影响[J].无机材料学报,2003,18(6):1325-1330.
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