OS0615 ナノ界面制御によるカーボンナノチューブ/アルミナ複合材料の作製とその機械的特性評価(先進複合材料の強度・特性評価,オーガナイズドセッション)

概要

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We report the mechanical properties of multi-walled carbon nanotube (MWCNT)/alumina composites made with a pristine MWCNT and an acid-treated version that have nanoscale defects on their surfaces from the acid treatment. Microstructural observations revealed that a homogeneous distribution of MWCNTs in the alumina matrix was achieved by a novel processing approach based on the precursor method for the synthesis of alumina and acid-treated MWCNTs. An interesting geometric structure was observed between individual MWCNT and alumina matrix. The nanodefect on the acid-treated MWCNT was filled up with alumina crystal, wiuich may be intruding into the nanodefect during grain growth The addition of only 0.9 voL% acid-treated MWCNTs to alumina resulted in 27% and 25% simultaneous increases in bending strength (689.6 ± 29.1 MPa) and fracture toughness (5.90 ± 0.27 MPam^<1/2>), respectively.
一般社団法人日本機械学会の論文
2009-07-24