A Calorimetric investigation of the liquid bi-ni alloys

The partial and integral enthalpies of mixing of liquid binary bi-ni alloys were determined at 1273 and 1573 k. the calorimetric measurements were carried out using two different calorimeters. a calvet-type twin micro-calorimeter system (ht-1000) was used for t = 1273 k with a drop calorimetric technique. for higher temperature t = 1573 k a multi high-temperature micro-calorimeter (mhtc) has been used with a manual drop. the experimental data at 1273 and 1573 k have been compared to each other and to the assessed results available in the literature. finally,the experimental binary data were evaluated by means of a standard redlich-kister polynomial fit.