研究和分析了微弧氧化过程中电流和电压变化规律以 及微弧产生的机理.结果表明，电压是影响微弧氧化的主要因素之一，电压值过高将造成陶 瓷膜的破坏.电流值在微弧氧化过程中的各个阶段相异.微弧氧化过程具有明显的阶段性， 可初步分为初始氧化膜形成阶段、微弧诱发阶段和平衡氧化阶段.
The changing regularity of current and voltage and t he producing mechanism of microarc during the microarc oxidation of LY12 alloy w ere investigated.The results showed that the voltage is one of the main factors during microarc oxidation .The ceramic coati ng would be destroyed under the condition that voltage was overload .The differe nt electric currents were corresponding to distinct stages.Three distinct stages were observed during microarc oxidation,i.e.The initial stae represents that ce ramic coating was produced,the second microarc was aroused and finally the third the steady oxidation stage.
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