[1]张怡颖,张留艳 *,韩兆康,等.低压冷喷涂制备Al-Ni-xCr复合涂层及其磨损特性研究[J].电镀与精饰,2024,(5):36-43.[doi:10.3969/j.issn.1001-3849.2024.05.005]
　Zhang Yiying,Zhang Liuyan *,Han Zhaokang,et al.Study on the wear characteristics of Al-Ni-xCr composite coating prepared by low pressure cold spraying[J].Plating & Finishing,2024,(5):36-43.[doi:10.3969/j.issn.1001-3849.2024.05.005]
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低压冷喷涂制备Al-Ni-xCr复合涂层及其磨损特性研究
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《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2024年5
页码:
36-43
栏目:
出版日期:
2024-05-15

文章信息/Info

Title:
Study on the wear characteristics of Al-Ni-xCr composite coating prepared by low pressure cold spraying
作者:
（1.广东工业大学 材料与能源学院，广东 广州 510006；
2.广东工业大学 广东省海洋能源装备制造重点实验室，广东 广州 510006）
Author(s):
（1.School of Materials and Energy， Guangdong University of Technology， Guangzhou 510006，
China； 2.School of Electromechanical Engineering， Guangdong Provincial Key Laboratory of
Offshore Energy Equipment Manufacturing， Guangzhou 510006， China）
关键词:
Al-Ni-Cr 复合涂层; 冷喷涂; 摩擦系数; 极化行为
Keywords:
Al-Ni-Cr composite coating ;  cold spraying ;  friction coefficient ;  polarization behavior
分类号:
TH117.1
DOI:
10.3969/j.issn.1001-3849.2024.05.005
文献标志码:
A
摘要:
防腐性能较好的铝基涂层存在耐磨性不足的问题。本文设计了 Ni 粉和 Cr 粉复合沉积的方法来改善涂层的耐磨性。采用低压冷喷涂技术，制备了一系列 Cr 含量不同的 Al-Ni- x Cr 复合涂层。通过金相、扫描电镜及 X 射线衍射等方法分析了复合涂层的微观形貌和成分。采用显微硬度计和磨损仪测试了涂层的显微硬度和磨损曲线，结合磨痕形貌分析了复合涂层的磨损机理。研究得出：低压冷喷涂可实现 Al 、 Cr 、 Ni 三种金属粉的共沉积，并获得致密、均匀的 Al-Ni- x Cr 复合涂层。枝晶状 Ni 粉沉积率较高， Cr 粉沉积率较低。含 70 wt . %Cr 的混粉涂层中， Cr 含量约为 31 wt.% 。硬质颗粒 Cr 同时起到夯实涂层的作用，随着 Cr 含量增加， Al-Ni- x Cr 复合涂层的致密性提高。 Al-Ni- x Cr 复合涂层的耐磨性能主要来自于 Cr 而非 Ni ，且与 Cr 含量有关。 Al-Ni-70Cr 复合涂层耐磨性最佳，磨损率仅为 Al 涂层的 1/2 。其优异的耐磨性归因于摩擦界面形成了稳定的、较硬的、含 Cr 量较高的复合氧化膜，抑制了磨损过程。
Abstract:
： The Al-based coating has well corrosion resistance ， but its wear resistance is poor. In this paper ， mixing Ni and Cr powders was designed to improve the wear resistance of the Al-based coating. A series of Al-Ni- x Cr composite coatings with different Cr content were prepared by low pressure cold spraying. Their micro-morphology and composition were analyzed by means of metallography ， scanning electron microscopy and X-ray diffraction. Their microhardness and wear curve were measured by microhardness tester and wear meter. Their wear mechanism was analyzed according to the microscopic characteristics. The results show that the low pressure cold spraying can achieve the co-deposition of Al ， Cr and Ni metal powder. The Al-Ni- x Cr composite coating is dense and uniform. Dendrite Ni powder has a higher deposition rate ， while Cr powder shows a lower deposition rate. The Cr content in Al-Ni-70Cr coating is about 31 wt.%. With the increase of Cr content ， the densification of Al-Ni- x Cr composite coating increases. The wear resistance of Al-Ni- x Cr composite coating is mainly related to Cr content rather than Ni. Al-Ni-70Cr composite coating has the best wear resistance ， and its wear rate is only 1/2 of that of Al coating. Its excellent wear resistance is attributed to the formation of a stable hard and high Cr-containing composite oxide film at the friction interface ， which inhibits the wear process.

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备注/Memo

备注/Memo:
收稿日期： 2023-12-12 修回日期： 2024-01-25 作者简介： 张怡颖（ 2000 —），女，研究生，研究方向：表面工程， email ： 1041583198@qq.com * 通信作者： 张留艳（ 1983 —），女，博士，副教授，研究方向：表面工程， email ： zlyjust@gdut.edu.cn 基金项目： 广东省基础与应用基础研究基金（ No. 2022A1515240004 ）；广州市科技计划项目（ No. 2023A04J0270 ）?/html>
更新日期/Last Update: 2024-05-05