Interfacial Stability of a Spark Plasma Sintered Mo-Ti3SiC2 Layered Composite

Tungwai Leo Ngai; Wei Zheng; Chang Xu Hu; Heng Xie; Yuan Yuan Li

doi:10.4028/www.scientific.net/AMR.211-212.1051

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Interfacial Stability of a Spark Plasma Sintered Mo-Ti₃SiC₂ Layered Composite

Abstract:

Mo-Ti₃SiC₂ layered composite was successfully prepared by spark plasma sintering at 1573 K for 20 min under a pressure of 50 MPa in vacuum. The Mo and Ti₃SiC₂ layers were metallurgically bound together without noticeable superficial defects and micro-cracks at the interface. The fabricated Mo-Ti₃SiC₂ layered composite was annealed at 1273 K under vacuum for 5, 10, 20 and 40 h to study the composite’s thermal stability. Three intermediate layers, Mo₂C, MoSi₂ and Ti₅Si₃C_x, were formed at the interface. Experimental results showed that the Mo-Ti₃SiC₂ layered composite prepared in this study has good interfacial stability at elevated temperature.