Structure and Mechanical Properties of CrTiAlN/TiAlN Composite Coatings Deposited by Multi-Arc Ion Plating

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作者
闫少健 [1 ]
田灿鑫 [1 ]
黄志宏 [1 ]
杨兵 [2 ]
付德君 [1 ]
机构
[1] Key Laboratory of Artificial Micro- and Nano-Materials of Ministry of Education and School of Physics and Technology,Wuhan University
[2] School of Power and Mechanical Engineering,Wuhan
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摘要
CrTiAlN/TiAlN composite coatings were deposited on cemented carbide by using a home-made industrial scale multi-arc ion plating system. The samples were studied by X-ray diffraction, scanning electron microscopy(SEM), microhardness and ball-on-disk testing. The properties of the CrTiAlN/TiAlN coatings were significantly influenced by the microstructure and the deposition time ratio of TiAlN over CrTiAlN layers. With the increase of deposition time ratio, the microhardness of CrTiAlN/TiAlN increased from 28.6 GPa to 37.5 GPa, much higher than that of CrTiAlN coatings. The friction coefficients of the CrTiAlN/TiAlN coatings were higher than those of CrTiAlN coatings against a cemented carbide ball. The microhardness of the CrTiAlN/TiAlN coatings was changed after annealing at 800 oC, and the friction coefficients of the annealed coatings were increased against the cemented carbide ball.
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页数:5
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