Dy-Ni-B system

Based on x-ray diffraction data, the 1070- (0-33 mol % Dy) and 870-K (33-10 0 mol % Dy) sections of the Dy-Ni-B phase diagram were constructed. The exi stence of 13 ternary borides was confirmed, and two new borides with the te ntative compositions Dy2Ni2B and Dy3Ni8B9 and unidentified structures were obtained. The coordination polyhedra and configurations of boron atoms in t he borides of the Dy-Ni-B system are examined. The phase relations in the s ystems Ln-Ni-B (Ln = yttrium-group rare earth) are analyzed.