直流模式电流密度对铝锂合金微弧氧化膜性能的影响

吴鸿, 冯长杰, 王景, 王赫男, 李杰, 辛丽, 王福会

doi:10.16577/j.issn.1001-1560.2024.0027

材料保护 >

2024 , Vol. 57 >Issue 2: 1 - 11

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0027

研究篇

直流模式电流密度对铝锂合金微弧氧化膜性能的影响

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¹沈阳航空航天大学材料科学与工程学院； ²中航光电科技股份有限公司； ³中国科学院金属研究所腐蚀与防护实验室； ⁴东北大学材料科学与工程学院

冯长杰(1977-)，博士，教授，从事表面处理与腐蚀防护研究，E-mail: chjfengniat＠126.com

收稿日期: 2023-04-03

修回日期: 2023-04-23

录用日期: 2023-05-10

网络出版日期: 2024-03-08

基金资助

辽宁省“兴辽英才计划”项目(XLYC2002031)；沈阳航空航天引进人才科研启动基金(19YB05)资助

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Effect of DC Mode Current Density on Properties of Micro-Arc Oxidation Film on Aluminum Lithium Alloy

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(1.College of Material Science and Engineering， Shenyang Aerospace University， Shenyang 110136， China；2.AVIC Jonhon Optronic Technology Co.， Ltd.， Luoyang 471032， China；3.Laboratory for Corrosion and Protection， Institute of Metal Research， Chinese Academy of Sciences， Shenyang 110016， China；4.College of Material Science and Engineering， Northeastern University， Shenyang 110819， China)

FENG Changjie (1977-)， Ph.D.， Professor， Research Focus: Surface Treatment and Corrosion Protection，E-mail: chjfengniat＠126.com

Received date: 2023-04-03

Revised date: 2023-04-23

Accepted date: 2023-05-10

Online published: 2024-03-08

Supported by

“Xingliao Talent Plan” Project in Liaoning Province (XLYC2002031)； Shenyang Aerospace Talent Introduction Research Launch Fund (19YB05)

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摘要

为了研究直流模式下电参数对铝锂合金微弧氧化成膜机理和膜层性能的影响，以2195 铝锂合金为研究对象，在硅酸盐-磷酸盐碱性电解液体系中，以直流稳流模式在不同电流密度下制备了微弧氧化陶瓷膜。通过扫描电子显微镜(SEM) 及其自带的能谱仪(EDS)、X 射线衍射仪(XRD)分析了微弧氧化膜的表面和截面形貌、元素组成及物相组成。采用电化学工作站和摩擦磨损试验机分别测定了不同陶瓷膜的耐蚀性能和耐磨性能。结果表明:微弧氧化陶瓷膜中主要含O、Al、Si 和P 元素，膜层相组成主要为γ-Al2O3和少量α-Al2O3。在电流密度为4～16 A/dm2的范围内，随着电流密度的升高，膜层的耐蚀性和耐磨性都呈先升高后降低的趋势，电流密度为8 A/dm2时膜层的耐蚀性最好，自腐蚀电流密度为5.171 8×10-7 A/cm2，致密层电阻Rb值3.323×104 Ω·cm2。电流密度为8 A/dm2时膜层耐磨性最好，磨损机理为疲劳磨损和磨料磨损混合，磨损率为0.343 75×10-6 cm3/(N·m)。

关键词： 铝锂合金; 直流电源; 微弧氧化; 耐磨性; 耐蚀性

本文引用格式

吴鸿, 冯长杰, 王景, 王赫男, 李杰, 辛丽, 王福会 . 直流模式电流密度对铝锂合金微弧氧化膜性能的影响[J]. 材料保护, 2024 , 57(2) : 1 -11 . DOI: 10.16577/j.issn.1001-1560.2024.0027

Abstract

In order to study the influence of electrical parameters on the film formation mechanism and film properties of aluminum-lithium alloy micro-arc oxidation in DC mode，2195 aluminum lithium alloy was used as the research object to prepare micro-arc oxidation ceramic film in a silicate phosphate alkaline electrolyte system under different current densities in a DC steady current mode.The surface and cross-sectional morphology， elemental composition and phase composition of micro-arc oxidation film were analyzed by scanning electron microscopy (SEM)，energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD).The corrosion resistance and wear resistance of different ceramic film were measured by using an electrochemical workstation and a friction and wear tester.Results showed that the ceramic film mainly contained O，Al， Si， and P elements， and the phase composition of the film layer was mainly γ-Al2O3 and a small amount of α-Al2O3.In the range of current density 4～16 A/dm2， with the increase of current density，the corrosion resistance and wear resistance of the film layer first increased and then decreased.When the current density was 8 A/dm2， the as-prepared film possessed the optimal corrosion resistance， with the self-corrosion current density of 5.171 8×10-7 A/cm2 and the dense layer resistance Rb of 3.323×104 Ω·cm2.When the current density was 8 A/dm2，the as-prepared film had the best wear resistance， and the wear mechanism was a mixture of fatigue wear and abrasive wear， with a wear rate of 0.343 75×10-6 cm3/(N·m).

Key words： aluminum lithium alloy; DC power supply; micro-arc oxidation; abrasion resistance; corrosion resistance

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