The fracture toughness of hot-pressed NbCr2 alloys doped by rare earth yttrium

摘要

NbCr2 Laves phase alloys doped by rare earth yttrium were fabricated by mechanical alloying and hot pressing. The effect of yttrium addition content on the fracture toughness of these alloys was investigated. The experimental results show that a minor addition of yttrium can refine the microstructure and toughen NbCr2 Laves phase. When the content of yttrium in NbCr2 is about 0.1 wt.%, the fracture toughness value is increased by about 20%, which is 4 times higher than that of the cast alloy (1.2 MPa m1/2).