What will be done in the future with O.J. Kleppa’s enthalpy data set?

Abstract A survey of Kleppa’s complete literature allows us to distinguish five different periods in his work. Each period is linked to another type of the calorimeter device increasing the temperature range at each step. Starting from the study of low melting binary alloys during his thesis period, Prof. Kleppa measured the enthalpy of formation of many refractory compounds in the last period. More than 200 binary systems were studied providing an unrivalled enthalpy data set of crucial interest for the phase diagram optimisation. Thanks to the computer efficiency it is yet possible to use these data in multicomponent systems modeling for real industrial applications. The quinary Cu–In–Pb–Sn–Zn system for which Prof. Kleppa established many binary enthalpy data illustrates the method.