Thermodynamic investigation of samarium-nickel alloys

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