Heat capacity of nickel–phosphorus eutectic melts

$\rm Ni$–$\rm P$ alloys containing phosphorus from $15$ to $23$ at $\%$, which is close to the eutectic concentration, are studied with differential scanning calorimetry. The heat capacity $C_P$ is calculated at a constant pressure for the melts from the obtained data. The $C_P$ values of the alloys at temperatures above their melting points at $50^{\circ}$C are $0.53$–$0.59$ J/(g K) and are in good agreement with the literature heat capacity values for liquid nickel and $\rm Ni_3\rm P$. The $C_P$ of all of the melts linearly increases from the $T_L$ liquidus temperature to $1400^{\circ}$С. There is a maximum on the concentration dependence of $C_P$ at the eutectic concentration.