钽合金在熔融镍中的防护涂层研究
发布时间：2018-08-19 20:46
【摘要】：在钽合金微弧氧化陶瓷层表面电镀镍,分析了陶瓷层和镀镍层的形貌、成分组成及陶瓷层与镀镍层的结合情况,研究了陶瓷层表面有无镀镍层对浇铸时钽合金在熔融镍中防护作用的影响。结果表明:采用微弧氧化技术在钽合金表面制备的陶瓷层主要成分为Ta2O5,厚度可达30~35μm;采用PVD结合电镀的方法在陶瓷层表面制备的镍镀层厚度为20~30μm,且镀镍层表面致密,镀镍层与陶瓷层结合连续紧密;无镀镍层的钽合金试样在浇铸过程中受到熔融镍的作用后表面陶瓷层会开裂失效,导致基体与熔融镍发生反应,无法起到防护作用;有镍镀层的钽合金试样在受到熔融镍的作用后表面陶瓷层连续完整,镀镍层可以有效地防止陶瓷层开裂,显著提高陶瓷层对钽合金的防护作用。
[Abstract]:Nickel was electroplated on the surface of tantalum alloy micro-arc oxidation ceramic layer. The morphology, composition and combination of ceramic layer and nickel coating were analyzed. The effect of nickel plating on the protection of tantalum alloy in molten nickel was studied. The results show that the main composition of ceramic coating prepared on tantalum alloy surface by micro-arc oxidation is Ta _ 2O _ 5, and the thickness of ceramic coating can reach 30 ~ 35 渭 m, and the thickness of nickel coating prepared by PVD combined with electroplating is 20 ~ 30 渭 m and the surface of nickel coating is compact. The nickel plating layer and the ceramic layer are connected continuously and tightly, and the ceramic layer on the surface of the tantalum alloy without nickel plating layer will crack and fail after the molten nickel is acted on during the casting process, which leads to the reaction between the matrix and the molten nickel, which can not play a protective role. The ceramic layer on the surface of tantalum alloy with nickel coating is continuous and complete after being acted on by molten nickel. Nickel plating layer can effectively prevent the ceramic layer from cracking and improve the protective effect of ceramic coating on tantalum alloy.
【作者单位】： 西北有色金属研究院;
【基金】：国家自然科学基金(51171155)
【分类号】：TQ153.12
，
本文编号：2192787
[Abstract]:Nickel was electroplated on the surface of tantalum alloy micro-arc oxidation ceramic layer. The morphology, composition and combination of ceramic layer and nickel coating were analyzed. The effect of nickel plating on the protection of tantalum alloy in molten nickel was studied. The results show that the main composition of ceramic coating prepared on tantalum alloy surface by micro-arc oxidation is Ta _ 2O _ 5, and the thickness of ceramic coating can reach 30 ~ 35 渭 m, and the thickness of nickel coating prepared by PVD combined with electroplating is 20 ~ 30 渭 m and the surface of nickel coating is compact. The nickel plating layer and the ceramic layer are connected continuously and tightly, and the ceramic layer on the surface of the tantalum alloy without nickel plating layer will crack and fail after the molten nickel is acted on during the casting process, which leads to the reaction between the matrix and the molten nickel, which can not play a protective role. The ceramic layer on the surface of tantalum alloy with nickel coating is continuous and complete after being acted on by molten nickel. Nickel plating layer can effectively prevent the ceramic layer from cracking and improve the protective effect of ceramic coating on tantalum alloy.
【作者单位】： 西北有色金属研究院;
【基金】：国家自然科学基金(51171155)
【分类号】：TQ153.12
，
本文编号：2192787
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