Thermodynamic investigation of samarium-nickel alloys

The enthalpies of formation of thr Sm-Ni solid alloys at 300 K were determi ned by direct calorimetry using two different calorimetric apparatus, The c haracterization of the samples was performed using metallographic and X-ray . diffraction analyses. The values of Delta H-f degrees (kJ/mol of atoms) f or the following compounds were obtained for the formation in the solid sta te at 300 ii: Sm,Ni: -21.5 +/-2; SmNi: -33.0 +/-1; SmNi2: -36.0 +/-1. The r esults are discussed and compared with those of other similar rare earth-ni ckel compounds, (C) 2001 Elsevier Science B,V, All rights reserved.