ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Fully dense nano-sized Si3N4/SiC/TiCxN1−x conductive composites have been synthesized through the reactive-consolidation of a powder mixture of amorphous polymer precursor-derived silicon carbonitride and nanocrystalline TiO2 by pulse electric current sintering. The nano-Si3N4 and SiC grains, with sizes ranging from 15 to 30 nm, form large aggregate regions up to 20 μm in size. The nano-TiC0.3N0.7 grains, ranging from 100 to 300 nm in size, form a connected matrix in which the micro-sized Si3N4/SiC aggregate regions are distributed. The resultant ceramic composite possesses an excellent electrical conductivity, ∼3.40 × 104 (Ω·m)−1. This ceramic also exhibits favorable mechanical properties, including ∼14 GPa hardness and 6.7 MPa·m1/2 fracture toughness.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1551-2916.2004.00044.x
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