Effect of Ag content on mechanical properties of Dy123 bulks

Three-point bending tests on specimens cut from Dy123 bulks with X wt.% Ag (X = 5, 7.5 and 10) were carried out at room temperature. Bending test specimens with 2.8 × 2.1 × 24 mm3 were cut from the bulk samples and then annealed in O2 atmosphere at 723 K for 100 h. The Young's modulus decreased with increase of the Ag content, 136, 128 and 124 GPa for X = 5, 7.5 and 10, respectively. On the other hand, the fracture strength increased, 86, 89 and 91 MPa. The Ag content dependences of the Young's modulus and the fracture strength are analyzed through the area fraction of the pores and Ag particles in each bending test specimen.