Synthesis and mechanical properties of nanocrystalline MoSi sub(2)-SiC composite

Nanocrystalline MoSi sub(2)-SiC composite was synthesized by liquid silicon infiltration in nanocrystalline molybdenum carbide (Mo sub(2)C) preform, which was synthesized by the solution route. The average crystallite size of MoSi sub(2) and SiC was about 60nm. The average hardness and fracture toug...

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Bibliographic Details
Published in:Scripta materialia 2008-02, Vol.58 (3), p.211-214
Main Authors: Patel, M, Subramanyuam, J, Bhanu Prasad, VV
Format: Article
Language:English
Subjects:
Crystallites
Diffraction
Hardness
Infiltration
Liquids
Molybdenum silicide
Nanocrystals
Silicon carbide
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Summary:Nanocrystalline MoSi sub(2)-SiC composite was synthesized by liquid silicon infiltration in nanocrystalline molybdenum carbide (Mo sub(2)C) preform, which was synthesized by the solution route. The average crystallite size of MoSi sub(2) and SiC was about 60nm. The average hardness and fracture toughness obtained were 12GPa and 4.3MPam super(1) super(/) super(2), respectively. Lower molybdenum silicide (Mo sub(5)Si sub(3)) and Nowotny's phase (Mo sub(5)Si sub(3)C) 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