The contact angles between three non-metallic inclusion-type oxide substrates, viz. Al₂O₃, MgO, and MgO·Al₂O₃, and molten Fe and molten Fe-based stainless steel (Fe–Cr–Ni alloy) were measured using the sessile drop method in Ar atmosphere at 1873 K. The contact angles between molten Fe and oxide substrates ranged between 111° and 117°, while that between molten Fe–Cr–Ni alloy and substrates ranged between 103° and 105°. The angles between the alloy and each of the substrates were smaller than the corresponding values for Fe, which was attributed to the superior wettability of molten Fe–Cr–Ni alloy on the substrates. The wettability of the molten materials is related to the interfacial tension between the molten metals and each substrate. Thus, the interfacial tension between the molten metals and the non-metallic substrates was quantitatively evaluated using Young’s equation and the measured contact angles; the interfacial tension for molten Fe ranged from 1.862 to 2.781 N·m⁻¹, while that for molten Fe–Cr–Ni alloy ranged from 1.513 to 2.286 N·m⁻¹. Owing to the higher reactivity between molten Fe–Cr–Ni alloy and the substrates, the interfacial tension and energy between them were lower than those between molten Fe and the substrates.

三个非金属夹杂型氧化物基材之间的接触角，即。Al ₂ O ₃、MgO、MgO·Al ₂ O ₃, 和熔融铁和熔融铁基不锈钢（Fe-Cr-Ni 合金）在 1873 K 的 Ar 气氛中使用固滴法测量。 熔融 Fe 和氧化物基材之间的接触角范围在 111° 和 117° 之间，而熔融的 Fe-Cr-Ni 合金与基体之间的夹角介于 103° 和 105° 之间。合金与每个基体之间的角度小于 Fe 的相应值，这归因于熔融 Fe-Cr-Ni 合金在基体上的优异润湿性。熔融材料的润湿性与熔融金属与各基材之间的界面张力有关。因此，使用杨氏方程和测量的接触角定量评估熔融金属和非金属基材之间的界面张力；^-1，而熔融的 Fe-Cr-Ni 合金的范围从 1.513 到 2.286 N·m ^-1。由于熔融 Fe-Cr-Ni 合金与基体之间的反应性较高，它们之间的界面张力和能量低于熔融 Fe 与基体之间的界面张力和能量。