Tensile properties of a refractory metal base in situ composite consisting of an Nb solid solution and hexagonal Nb_5Si_3

摘要

Tensile properties and fracture behavior of an Nb_(ss)/Nb_5Si_3 in situ composite in which the silicide has a hexagonal structure has been investigated. Excellent tensile strength of 460 MPa is obtained at 1470K. The fracture is attributed to cleavage of the Nb_5Si_3, Nb_(ss)/Nb_5Si_3 interface separation and ductile rupture of Nb_(ss).