【摘要】：在鉭合金微弧氧化陶瓷層表面電鍍鎳,分析了陶瓷層和鍍鎳層的形貌、成分組成及陶瓷層與鍍鎳層的結(jié)合情況,研究了陶瓷層表面有無鍍鎳層對澆鑄時(shí)鉭合金在熔融鎳中防護(hù)作用的影響。結(jié)果表明:采用微弧氧化技術(shù)在鉭合金表面制備的陶瓷層主要成分為Ta2O5,厚度可達(dá)30~35μm;采用PVD結(jié)合電鍍的方法在陶瓷層表面制備的鎳鍍層厚度為20~30μm,且鍍鎳層表面致密,鍍鎳層與陶瓷層結(jié)合連續(xù)緊密;無鍍鎳層的鉭合金試樣在澆鑄過程中受到熔融鎳的作用后表面陶瓷層會(huì)開裂失效,導(dǎo)致基體與熔融鎳發(fā)生反應(yīng),無法起到防護(hù)作用;有鎳鍍層的鉭合金試樣在受到熔融鎳的作用后表面陶瓷層連續(xù)完整,鍍鎳層可以有效地防止陶瓷層開裂,顯著提高陶瓷層對鉭合金的防護(hù)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.
【作者單位】： 西北有色金屬研究院;
【基金】：國家自然科學(xué)基金(51171155)
【分類號】：TQ153.12
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本文編號：2192787