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在Na2SiO3-NaOH复合电解液体系下,对ZAlSi12Cu2Mg1微弧氧化陶瓷膜的形成进行了研究;通过改变丙三醇的含量,研究了其对电解液的电导率、微弧氧化的临界起弧电压、稳定氧化时间和陶瓷膜层厚度的影响,分析了丙三醇的作用。结果表明,丙三醇含量从0 ml/L到12 ml/L变化时,临界起弧正向电压由360 V逐渐升高至410 V,稳定氧化时间由16 min延长到26 min;含量从0 ml/L增加到4 ml/L时,膜厚从65μm迅速增加到152μm。含量超过4 ml/L,膜厚缓慢增加。电解液中加入丙三醇,膜层中除了莫来石相,还出现了α-Al2O3、γ-Al2O3、WO3和SiO2相。
The formation of ZAlSi12Cu2Mg1 micro-arc oxidation ceramic membrane was studied in Na2SiO3-NaOH composite electrolyte system. The conductivity of the electrolyte, the critical arc voltage of micro-arc oxidation, Stable oxidation time and the thickness of the ceramic coating, the effect of glycerol was analyzed. The results showed that when the content of glycerol changed from 0 ml / L to 12 ml / L, the critical voltage increased gradually from 360 V to 410 V and the oxidation time increased from 16 min to 26 min. From 0 ml / L to 4 ml / L, the film thickness increased rapidly from 65μm to 152μm. Content of more than 4 ml / L, the film thickness increased slowly. Glycerol was added to the electrolyte, and in addition to the mullite phase, α-Al2O3, γ-Al2O3, WO3 and SiO2 phases also appeared.