Synthesis and mechanical properties of nanocrystalline MoSi2–SiC composite

Synthesis and mechanical properties of nanocrystalline MoSi2–SiC composite

Nanocrystalline MoSi2-SiC composite was synthesized by liquid silicon infiltration in nanocrystalline molybdenum carbide (Mo2C) preform, which was synthesized by the solution route. The average crystallite size of MoSi2 and SiC was about 60nm. The average hardness and fracture toughness obtained wer...

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Veröffentlicht in:Scripta materialia 2008-02, Vol.58 (3), p.211-214
Hauptverfasser: Patel, Manish, Subramanyuam, J., Bhanu Prasad, V.V.
Format: Artikel
Sprache:eng
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Zusammenfassung:Nanocrystalline MoSi2-SiC composite was synthesized by liquid silicon infiltration in nanocrystalline molybdenum carbide (Mo2C) preform, which was synthesized by the solution route. The average crystallite size of MoSi2 and SiC was about 60nm. The average hardness and fracture toughness obtained were 12GPa and 4.3MPam1/2, respectively. Lower molybdenum silicide (Mo5Si3) and Nowotny's phase (Mo5Si3C) were absent. The composite was characterized by X-ray diffraction, optical microscopy and micro-hardness testing.
ISSN:1359-6462
DOI:10.1016/j.scriptamat.2007.09.038