Kaizô Monma and Hajime Sutô
We are trying to clear the fundamental mechanisms on cermet making from the view point of surface and interfacial tension. In this paper, we firstly describe the measurement of surface tension of molten metals by the sessile drop method, and then deduce a semi-theoretical equation as follows: Us=BM(LV-RT/2)N3V-3 or γ=KMLVN-3V-3, where Us is the surface energy, γ the surface tension, Lv the molar heat of vaporization, N the Loschmidt's number, V the molar volume,and BM or KM is a constant for molten metals. From our results, KM 0.16 and BM=0.18. In general, similar equations are obtained for Van der Waals' and ionic liquid by applying results reported by other authors. But in these cases, the constant for Van der Waals' liquid is BV 0.5 and for ionic liquid, BI 0.10, KI 0.07.
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