Rapid Solidification of $\mathrm{ZrO}_2$–$8$ mol $\%$ $\mathrm{Y}_2\mathrm{O}_3$ Melt under Conditions of Stepwise Reduction of Heating. Determination of the Liquidus and Solidus Temperatures

Investigations are conducted into the process of crystallization of a bath with a $\mathrm{ZrO}_2$–$8$ mol $\%$ $\mathrm{Y}_2\mathrm{O}_3$ melt which is produced by local heating of ceramic by concentrated laser radiation and solidifies when the radiation power decreases by $20$–$30\%$. It is demonstrated that a gently sloping temperature plateau is observed in the process of solidification, which may be used to estimate the liquidus temperature.