Abstract
Layers formed on the surfaces of Co-B melts in vacuum and in a helium atmosphere with oxygen and carbon contamination are purified. It is established that films containing B2O3 and CoO oxides form on the melt surfaces, leading to abnormalities in the temperature dependences of viscosity. It is shown that increasing the boron content in the Co100−xBx alloys lowers the temperature of oxide disappearance. Raising the oxygen content stabilizes oxides, while carbon impurities block their formation.
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