Product/metal ratio (PMR): A novel criterion for the evaluation of electrolytes on micro-arc oxidation (MAO) of Mg and its alloys
Product/metal ratio (PMR): A novel criterion for the evaluation of electrolytes on micro-arc oxidation (MAO) of Mg and its alloys
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DOI：
10.1007/s11431-011-4502-1
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Lai-Wen Song;Yingwei Song;D. Shan;G. Zhu;E. Han
中科院分区：
文献类型：
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作者：
Lai-Wen Song;Yingwei Song;D. Shan;G. Zhu;E. Han
产品/金属比（PMR）被引入作为评估镁及其合金微弧氧化（MAO）电解质的新标准。该标准最初源于起球-贝德沃斯比 (PBR)，重点关注电解质对制造涂层致密性的作用，并关注 MAO 过程中反应物/产物的性质。同时，根据我们的实验和文献结果，探讨了电解质添加剂对镁合金MAO涂层形貌和成分的影响，以验证和补充初始标准。结合初始PMR准则和实验验证，PMR可以用特殊模式(PMRs=V氧化物产物/Valloy衬底)和一般模式(PMRg=PMRs+PMRd)来表示。理想的PMR应在1到2之间，而PMR与MAO过程中的涂层沉积有关。当考虑涂层的覆盖性（O）和电解质复合物的有效沉积（D）的影响时，PMR是对PMR的补充（PMRd=f（O，D）。O与MAO产物的熔点（MP）和沸点（BP）有关。D为 与MAO过程中合金基体和电解质之间的有效反应有关。
Product/metal ratio (PMR) was introduced as a novel criterion for the evaluation of electrolytes on micro-arc oxidation (MAO) of Mg and its alloys. The criterion initially sprang from Pilling-Bedworth ratio (PBR), focused on the roles of electrolytes for the compactness of the fabricated coatings, and took attention on properties of reactants/products during MAO. Meanwhile, based on our experiments as well as the results from literatures, the effects of electrolyte additives on morphologies and compositions of the fabricated MAO coatings of Mg alloys were exploited for verification and supplement of the initial criterion. In combination of the initialPMRcriterion and experimental verification,PMRcould be represented by special mode (PMRs=Voxide products/Valloy substrates) and general mode (PMRg=PMRs+PMRd). The idealPMRsshould be between 1 and 2, whilePMRdis related to the coating deposition during MAO.PMRdis a supplement toPMRswhen the effect of the overlaying property (O) of the coatings and the effective deposition (D) of electrolyte composites are considered (PMRd=f(O, D). O is related to the melting point (MP) and boiling point (BP) of the MAO products. D is related to the effective reactions between alloy substrates and electrolytes during MAO.