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| High Temperature Cycle Oxidation Behavior of PS45/CuAl8 Pseudo-Alloy Composite Coating |
| WU Yaosha, QIU Wanqi, YU Hongya, ZHONG Xichun, LIU Zhongwu, ZENG Dechang, LI Shangzhou |
| School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640 |
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Cite this article:
WU Yaosha QIU Wanqi YU Hongya ZHONG Xichun LIU Zhongwu ZENG Dechang LI Shangzhou. High Temperature Cycle Oxidation Behavior of PS45/CuAl8 Pseudo-Alloy Composite Coating. Chin J Mater Res, 2011, 25(2): 129-134.
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Abstract A pseudo-alloy coating PS45/CuAl8 was prepared on Q235 steel by activated combustion high-velocity electirc arc spraying(HVAA). The cycle oxidation experiments at 600oC and 800oC in air for these coatings were accomplished, the microstructure, crystal structure and oxidation resistance properties were haracterized and analyzed by means of X-ray diffraction, scanning electron microscopy (SEM) with energy spectrometer (EDS) and the cycle oxidation behaviors were investigated. The results show that the pseudo-alloy coatings PS45/CuAl8 compose of Al2O3, Cr2 O3, α–Cu and γ–Ni solid solution, and possess dense and typical lamellar structure which were homogeneous. After high temperature oxidation, the coating was covered by dense, continuous and complete oxide films of Cr2O3, Al2O3 and Ni(Cr,Al)2O4, which can avoid spalling of Al2O3 film and reduce the oxidation rate of the composite coating, play an important role for protecting the substrate.
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Received: 30 August 2010
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| Fund: Supported by Key Projects of the Guangdong Provincial Science & Technology Program Nos.2009A090100045, 2010A090200077 and 00567440136976033, Project of the Zhongshan Civic Science & Technology Program No.20103A262. |
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