2O5,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；沒有鍍鎳層的鉭合金試樣在澆鑄過(guò)程中受到熔融鎳的熱沖擊后表面陶瓷層會(huì)開裂失效,導(dǎo)致基體被熔解；有鎳鍍層的鉭合金試樣在受到熔融鎳的熱沖擊后表面陶瓷層連續(xù)完整,鍍鎳層可以有效地防止陶瓷層開裂,顯著提高陶瓷層的抗熱沖擊性能。"/>

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鍍鎳層對(duì)鉭合金微弧氧化層抗熱沖擊性能的影響
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西北有色金屬研究院,西北有色金屬研究院,西北有色金屬研究院,西北有色金屬研究院

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Effects of Nickel Plating on Thermal Shock Resistance of Ceramics on Ta-base Alloy Formed by Micro-arc Oxidation
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    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,研究了陶瓷層與熔融鎳接觸時(shí)鍍鎳層對(duì)其抗熱沖擊性能的影響。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；沒有鍍鎳層的鉭合金試樣在澆鑄過(guò)程中受到熔融鎳的熱沖擊后表面陶瓷層會(huì)開裂失效,導(dǎo)致基體被熔解；有鎳鍍層的鉭合金試樣在受到熔融鎳的熱沖擊后表面陶瓷層連續(xù)完整,鍍鎳層可以有效地防止陶瓷層開裂,顯著提高陶瓷層的抗熱沖擊性能。

    Abstract:

    Nickel was continuously plated via magnetron sputtering and electroplating on the surface of Ta-based alloy processed by micro-arc oxidation, and its effects on the thermal shock resistance of the ceramic scale formed on the surface of Ta-based alloy to molten nickel was investigated. The results showed that the ceramic scale with a thickness of 30~35μm prepared by micro-arc oxidation was mainly Ta2O5. Although the ceramic layer was continuous and bonded well to the alloy substrate, severe cracking and peeling occurred when it contacted with the molten nickel during casting, which caused the melting of the Ta-based alloy. Fortunately, the thermal shock resistance of the ceramic scale to molten nickel was greatly improved by the plated nickel layer with a thickness of 20~30μm. The ceramic scale was still continuous and integrity after nickel casting. Thus, the nickel plating can be used as a protection coating for the ceramic scales on the Ta-based alloy prepared by micro-arc oxidation in molten nickel environments.

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王毅飛,李爭(zhēng)顯,黃春良,楊海彧.鍍鎳層對(duì)鉭合金微弧氧化層抗熱沖擊性能的影響[J].稀有金屬材料與工程,2017,46(8):2283~2287.[Wang Yifei, Li Zhengxian, Huang Chunliang, Yang Haiyu. Effects of Nickel Plating on Thermal Shock Resistance of Ceramics on Ta-base Alloy Formed by Micro-arc Oxidation[J]. Rare Metal Materials and Engineering,2017,46(8):2283~2287.]
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  • 收稿日期:2015-04-07
  • 最后修改日期:2015-08-03
  • 錄用日期:2015-09-06
  • 在線發(fā)布日期: 2017-11-16
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