Fabrication and microstructure evolution of niobium-niobium silicide composites by spark plasma sintering

Zhe Chen; Youwei Yan

doi:10.1007/s11595-005-2299-0

Journal of Wuhan University of Technology Materials Science Edition ›› 2007, Vol. 22 ›› Issue (2) : 299 -302. DOI: 10.1007/s11595-005-2299-0

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Fabrication and microstructure evolution of niobium-niobium silicide composites by spark plasma sintering

Zhe Chen ¹
Prof. , Youwei Yan ¹^,^{^{^b}}

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Abstract

By using Nb and Si elemental powders as raw materials, dense Nb/Nb₅Si₃ composites were successfully fabricated by a spark plasma sintering (SPS) technology. The microstructure of the fabricated composites was analyzed by OM, SEM, XRD and EPMA; the microstructure evolution of the composites was also investigated by a quenching test. The experimental results show that the prepared composites consist of Nb and Nb₅Si₃ phases; Nb particle uniformly distributes in the in-situ synthesized Nb₅Si₃ matrix. During the SPS process, an interfacial reaction occurs between Nb and Si particles to synthesize Nb₅Si₃ until reactant silicon has been completely depleted.

Keywords

spark plasma sintering / Nb/Nb₅Si₃ composites / fabrication / microstructure evolution

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Zhe Chen, Youwei Yan. Fabrication and microstructure evolution of niobium-niobium silicide composites by spark plasma sintering. Journal of Wuhan University of Technology Materials Science Edition, 2007, 22(2): 299-302 DOI:10.1007/s11595-005-2299-0

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