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CHEN Jian, LIU Xuepiao, LIANG Huan, CUI Ting, FANG Kai. Bonding properties of plasma sprayed Cr3C2-NiCr and NiAl/Cr3C2-NiCr coatings on CuCrZr alloy surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (5): 13-16.
Citation: CHEN Jian, LIU Xuepiao, LIANG Huan, CUI Ting, FANG Kai. Bonding properties of plasma sprayed Cr3C2-NiCr and NiAl/Cr3C2-NiCr coatings on CuCrZr alloy surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (5): 13-16.
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Bonding properties of plasma sprayed Cr3C2-NiCr and NiAl/Cr3C2-NiCr coatings on CuCrZr alloy surface

  • 1.

    Provincial Lab of Advanced Welding Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China

  • 2.

    Shanghai Sany Science & Technology Co., Ltd., Kunshan 215301, China

  • 3.

    Shanghai Sany Heavy Machinery Co., Ltd, Kunshan 215301, China

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  • Received Date: March 25, 2011
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  • The Cr3C2-NiCr,NiAl/Cr3C2-NiCr coatings were prepared by plasma spraying on the CuCrZr alloy.The bonding strength between the coating and the substrate and the thermal shock resistance were tested.The change of the phases and the coating bonding mechanism were investigated by means of SEM,EDS,XRD.The results show all coatings have good bonding strength.During the process of spraying the NiAl coating,an exothermic reaction generates between Ni and Al,and three kinds of intermetallics(Al4Ni3,Al3Ni2,AlNi3) are formed.The remaining Al can react with Cu substrate to form Cu3Al2,CuAl2 and CuAl,hence,the micro-metallurgical bond exists in some micro-zones.However,the bond type is mainly mechanical bond for all coatings.The bonding strength depends on the mechanical properties of the coating material,under the conditions of the same substrate and appropriate parameters.The thermal shock resistance of NiAl/Cr3C2-NiCr coating is better than that of Cr3C2-NiCr coating.
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