High-temperature compression behavior of Mo matrix composite assisted by plasticity of β-Mo₂C with semi-coherent interface

Hexagonal Mo₂C particles with semi-coherent phase interfaces were introduced within the Mo matrix via in-situ reactions. The strong hindering effect of Mo₂C particles on dislocations enables the composite to reach an ultimate compressive strength of 262 MPa at 1100 °C, which is 1.4 times that of pure Mo. Moreover, these Mo₂C particles not only undergo plastic deformation by the activation of pyramidal <c+a> dislocations to alleviate stress concentration at phase interfaces, but also promote dynamic recovery and recrystallization in Mo matrix, endowing the composite with excellent high-temperature plasticity.