Abstract
The in-situ laminated Nb/Nb5Si3 composite was prepared by spark plasma sintering. The microstructures and mechanical properties of the laminated Nb/Nb5Si3 composite were investigated in present work. It could be found that, alternant distribution microstructures of Nbss and Nb5Si3 layers were observed after sintering. The Nb/Nb5Si3 composite exhibited fracture toughness of 11.2MPa·m1/2, and the predicted fracture toughness was estimated by the Ashby model. Moreover, the deviation of the experimental value from the predicted value was discussed. In addition, the compressive strength of the in-situ laminated Nb/Nb5Si3 composite was measured at 1400°C and compared with that of the unidirectionally solidified Nb-17.5Si alloy.
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