NaAlO_2含量对ZAlSi12Cu2Mg1铝合金Na_2SiO_3微弧氧化陶瓷膜性能的影响  

Effect of Sodium Metaaluminate Additive on Properties of Micro-Arc Oxidation Ceramic Film on ZAlSi12Cu2Mg1 Aluminum Alloy

作　　者：王平[1,2] 郭小阳[1,2] 王斌[1,2] 杨洁[1,2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《材料保护》2012年第9期21-24,7,共4页Materials Protection

基　　金：四川省教育厅重点项目(12ZA293);西南石油大学校基金项目(2010XJZ169)资助

摘　　要：为了进一步探明添加剂种类及含量对ZAlSi12Cu2Mg1铝合金微弧氧化陶瓷膜性能的影响,在Na2SiO3电解液中,添加不同浓度的NaAlO2进行了微弧氧化,利用能谱仪(EDS)分析了陶瓷膜表面元素含量,用扫描电镜(SEM)观察其表面形貌,以X射线衍射仪(XRD)分析了膜的相组成,并测试了膜的厚度、硬度和极化曲线;研究了NaAlO2添加量对微弧氧化陶瓷膜特性的影响。结果表明,随着NaAlO2添加量的增加,陶瓷膜表面微孔尺寸变小,表面Al,O元素含量下降;起弧电压和最终氧化电压下降;陶瓷膜厚度增加,硬度和耐蚀性先提高后下降;陶瓷膜的相组成改变不明显。NaAlO2添加量为1 g/L时陶瓷膜的综合性能最好。Various concentrations of NaAlO2 additive were introduced into Na2SiO3 electrolyte to conduct micro-arc oxidation of ZAlSi12Cu2Mg1 alloy.The elemental composition,surface morphology,and phase ingredient of as-prepared micro-arc oxidation ceramic films were analyzed by means of energy dispersive spectrometry,scanning electron microscopy,and X-ray diffraction.Moreover,the thickness,hardness and polarization curve of as-prepared ceramic films were measured.Further,the effect of the content of NaAlO2 additive on the properties of micro-arc oxidation films was examined.Results show that the sparking voltage and terminal oxidation voltage decline with rising content of NaAlO2 additive,and the diameter of the pores as well as the content of Al and O elements of the micro-arc oxidation films also decline therewith.Besides,the thickness of the micro-arc oxidation films rises with increasing content of NaAlO2,while the hardness and corrosion resistance of the films rise at first and then decline.However,increasing NaAlO2 content has almost no effect on the phase ingredient of the micro-arc oxidation films;and the micro-arc oxidation film prepared from the electrolyte containing 1 g/L NaAlO2 possesses the best comprehensive properties.

关 键 词：微弧氧化 ZALSI12CU2MG1 NaAlO2 NA2SIO3 陶瓷膜 综合性能 

分 类 号：TG174.451[金属学及工艺—金属表面处理]