Measurements were carried out on boiling heat transfer to a liquid nitrogen pool due to self-heating of Ag sheathed BiPb2223 tapes with increasing over-currents up to 300 A, focusing on its difference from increasing heat flux in conventional heated surfaces. Large spontaneous oscillations of the surface temperature were observed and attributed to the interplay between the activation/deactivation of nucleate boiling and the highly nonlinear heat generation of the superconductor as a function of temperature. Two distinct steady states of 8 and 3 K superheating were also found for samples carrying 300 A, depending on the current cycle history.
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Bailey et al. (2006) studied this question.