ダイヤモンド微粒子の加熱処理により生成したカーボンオニオンの固体潤滑特性

概要

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Carbon onions were synthesized by heat treatment of diamond clusters or sub-micron particles that are less than 0.5μm in diameter. X-ray diffraction and transmission electron microscopy were employed to evaluate microstructure of the carbon onions. Solid lubricant properties of the carbon onions were measured by ball-on-disk type friction testing using silicon wafers and steel balls in air and vacuum. The heat treatment up to 1730℃ in argon ambient at atmospheric pressure results in synthesis of carbon onions in various particle sizes which correspond to original diamond particles. The carbon onions with fewer defects. which have been obtained from smaller diamond particles, have shown lower friction and wear-resistant properties both air vacuum. These superior tribological properties have been exhibited in humid ambient on smooth surface of which roughness is less than the particle size of carbon onions.
2003-05-05