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鎳鋁青銅9442#合金及其冷噴涂涂層磨蝕行為
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裝甲兵工程學(xué)院 裝備維修與再制造工程系

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TG172.5；TH117.1

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軍內(nèi)科研基金


Tribocorrosion behavior of nickel aluminum bronze(NAB) 9442# alloy and its cold spray coating
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Department of Equipment Maintenance and Remanufacturing,Academy of Armored Forces Engineering

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    摘要:

    采用冷噴涂技術(shù)在鎳鋁青銅9442合金上制備了較為致密，厚度約300μm的鎳鋁青銅涂層，使用SEM、XRD、XPS、電化學(xué)工作站、磨蝕試驗(yàn)機(jī)觀察并測(cè)試了鎳鋁青銅合金與涂層的組織形貌、電化學(xué)行為與磨蝕性能。結(jié)果表明：電化學(xué)腐蝕后基體發(fā)生了晶間腐蝕和選相腐蝕，涂層被腐蝕后顆粒上出現(xiàn)微孔和裂紋；磨蝕過(guò)程中存在著摩擦與鈍化的協(xié)同作用以及摩擦促進(jìn)陽(yáng)極溶解的過(guò)程；相比于靜態(tài)條件下，涂層與基體在磨蝕條件下測(cè)得的自腐蝕電位有大幅度下降，自腐蝕電流均提高了一個(gè)數(shù)量級(jí)，涂層與基體耐腐蝕性能變差；相比于干摩擦過(guò)程，磨蝕過(guò)程中涂層與基體的摩擦系數(shù)均有較大提高，減磨性能變差。

    Abstract:

    Nickel aluminum bronze coating was deposited by cold spray technology on the nickel aluminum bronze 9442# substrate. Microstructure, electrochemical behavior and tribocorrosion behavior were observed and tested by SEM, OM, XRD, XPS, electrochemical working station and abrasion machine. The results showed that intergranular corrosion and optional corrosion took place in electrochemical corrosion process, microspore and cracks appeared on coating after electrochemical corrosion; tribocorrosion process consisted of competition between friction and passivation and promotion of anodic dissolution by friction; compared with static state, Ecorrof coating and substrate under tribocorrosion condition drastically decreased, Icorrof coating and substrate increased an order of magnitude, corrosion resistance of coating and substrate became worse; compared with dry friction, friction coefficient of coating and substrate increased drastically, wear resistance of coating and substrate became worse.

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孫曉峰,陳正涵,李占明,黃元林,史玉鵬.鎳鋁青銅9442#合金及其冷噴涂涂層磨蝕行為[J].稀有金屬材料與工程,2018,47(11):3493~3498.[SUN Xiaofeng, CHEN Zhenghan, LI Zhanming, HUANG Yuanlin, SHI Yupeng. Tribocorrosion behavior of nickel aluminum bronze(NAB) 9442# alloy and its cold spray coating[J]. Rare Metal Materials and Engineering,2018,47(11):3493~3498.]
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  • 收稿日期:2017-01-19
  • 最后修改日期:2017-05-30
  • 錄用日期:2017-06-23
  • 在線發(fā)布日期: 2018-12-19
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