Creep of LaCrO-3Cr ceramic-metallic material

The creep of cermets in the system LaCrO3-Cr which was obtained by static and high speed pressing were compared. Materials with continuous interpenetrating ceramic and metallic framework were studied. It is shown that the creep rate is controlled by diffusion processes at the lanthanum chromite grain boundaries. The cermets produced by high speed pressing creeps more rapidly as a result of grain breakup, the formation of a substructure and nonequilibrium defect concentration. The use of high speed pressing to produce materials with increased stress relaxation capacity is recommended.