NEW EXPERIMENTAL-METHOD FOR THE DETERMINATION OF THE ELECTROCAPILLARYCURVES IN COPPER-VERTICAL-BAR-BORON PLUS ALUMINUM-OXIDE MELT

We studied the electrocapillary curves (ECC) sigma(phi) of pure copper and copper doped with 0.05 mass% of sulfur at 1200 degrees C in conta ct with boron + aluminium oxide electrolyte. A novel approach of the E CC determination involving in turn measurements of interfacial tension sigma by capillary depression (CD), maximum pressure (MP) in a drop a nd X-ray survey of sessile drop (SD) methods was used. The highest acc uracy was shown by the CD method, which was used in oxide systems for the first time. (C) 1997 Elsevier Science S.A.