Abstract Wetting characteristics of liquid iron on magnesia, alumina and silica mixture substrates were studied by sessile drop experiments. Chromium-free forsterite, mullite, spinel and quasi-corundum phases were selected as alternative refractories in MgO-Al2O3-SiO2. Morphological changes of molten electrolytic iron on the oxide substrates were investigated via apparent contact angle measurements. The results showed that the wetting behavior was significantly influenced by FeO compounds that were formed via oxidation of the liquid iron. Morphologies of the reacted layer were studied by Scanning Electron Microscope (SEM)/EDX analysis. The ternary phases FeO-MgO-SiO2 and FeO-Al2O3-SiO2 improved the wetting of liquid iron on the forsterite and mullite substrates by providing liquid phases at solid (refractory)–liquid (iron) interfaces. However, corrosion by liquid iron was significantly inhibited at spinel phase which did not feature FeO based compounds at the interface. Quasi-corundum (10MgO-25SiO2-65Al2O3) showed a much enhanced resistance to liquid iron compared to forsterite or mullite refractories.

中文翻译：

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铁水对镁橄榄石、莫来石、尖晶石和准刚玉基材润湿行为的研究

摘要 通过静滴实验研究了铁水在氧化镁、氧化铝和二氧化硅混合物基体上的润湿特性。选择无铬镁橄榄石、莫来石、尖晶石和准刚玉相作为 MgO-Al2O3-SiO2 中的替代耐火材料。通过表观接触角测量研究了氧化物基材上熔融电解铁的形态变化。结果表明，润湿行为受铁水氧化形成的 FeO 化合物的显着影响。通过扫描电子显微镜(SEM)/EDX分析研究反应层的形态。三元相 FeO-MgO-SiO2 和 FeO-Al2O3-SiO2 通过在固（耐火材料）-液体（铁）界面提供液相来改善液态铁在镁橄榄石和莫来石基底上的润湿。然而，尖晶石相显着抑制了铁水的腐蚀，该相在界面处没有 FeO 基化合物。与镁橄榄石或莫来石耐火材料相比，准刚玉 (10MgO-25SiO2-65Al2O3) 对铁水的抵抗力大大增强。