탄소나노튜브가 분산된 Al2O3 나노복합분말의 치밀화 및 특성
Densification and Some Properties of Carbon Nanotubes-Dispersed Al2O3 Nanocomposite Powders
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Abstract
In-situ processing route was adopted to disperse carbon nanotubes (CNTs) into Al2O3 powders homogeneously. The Al2O3 composite powders with homogeneous dispersion of CNTs could be synthesized by a catalytic route for in-situ formation of CNTs on nano-sized Fe dispersed Al2O3 powders. CNTs/Fe/Al2O3 nanopowders were densified by spark plasma sintering (SPS). The hardness and bending strength as well as electrical conductivity increased with increasing sintering temperature. However, the electrical conductivity of the composites sintered at above 1500℃ showed decreased value with increasing sintering temperature due to the oxidation of CNTs.
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