马文强,赵晓琴,安宇龙,卜珍宇,孙初锋,周惠娣,陈建敏.Y2O3含量对大气等离子喷涂Al2O3-Y2O3复合涂层微观结构和力学性能的影响[J].表面技术,2024,53(7):208-216.
MA Wenqiang,ZHAO Xiaoqin,AN Yulong,BU Zhenyu,SUN Chufeng,ZHOU Huidi,CHEN Jianmin.Effect of Y2O3 Content on Microstructure and Mechanical Properties of Al2O3-Y2O3 Composite Coatings Deposited by Atmospheric Plasma Spraying[J].Surface Technology,2024,53(7):208-216 |
| Y2O3含量对大气等离子喷涂Al2O3-Y2O3复合涂层微观结构和力学性能的影响 |
| Effect of Y2O3 Content on Microstructure and Mechanical Properties of Al2O3-Y2O3 Composite Coatings Deposited by Atmospheric Plasma Spraying |
| 投稿时间：2023-08-15 修订日期：2023-09-26 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.07.022 |
| 中文关键词: 大气等离子喷涂 Al2O3-Y2O3复合涂层 孔隙率 微观结构 力学性能 |
| 英文关键词:atmospheric plasma spraying Al2O3-Y2O3 composite coating porosity microstructure mechanical properties |
| 基金项目:国家自然科学基金(51975556，52167003);甘肃省重点研发计划项目(21YF5WA064);中央高校基本科研业务费(31920230148) |
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| Author | Institution |
| MA Wenqiang | School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China;State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
| ZHAO Xiaoqin | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
| AN Yulong | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
| BU Zhenyu | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
| SUN Chufeng | School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China |
| ZHOU Huidi | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
| CHEN Jianmin | State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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| 中文摘要: |
| 目的 探究掺杂不同质量分数Y2O3对Al2O3-Y2O3复合涂层微观结构及其力学性能的影响。方法 采用大气等离子喷涂制备Al2O3涂层，以及Y2O3质量分数分别为10%、20%、30%、40%的Al2O3-Y2O3复合涂层。利用SEM、EDS对粉末以及不同涂层的形貌、组织结构、元素分布进行分析。使用XRD表征粉末和涂层的物相。使用显微硬度仪、纳米压痕测试仪和电子万能试验机对涂层的显微硬度、弹性模量以及断裂韧性等力学性能进行测试分析。结果 Al2O3喷涂粉末的物相由α-Al2O3组成，而喷涂得到的Al2O3涂层则由α-Al2O3、γ-Al2O3组成。加入Y2O3后，对复合涂层中γ-Al2O3的生成有一定的抑制作用。随着喷涂粉末中Y2O3含量的增多，Al2O3-Y2O3复合涂层表面未充分熔融的颗粒逐渐增加，复合涂层的孔隙率也越来越大，掺杂了10%Y2O3的Al2O3-Y2O3复合涂层的孔隙率最低，涂层最致密。Al2O3涂层具有最高的显微硬度值(1 209HV0.3)和弹性模量(227 GPa)。随着Y2O3含量的增加，Al2O3-Y2O3复合涂层的显微硬度与弹性模量逐渐降低。Al2O3-10%Y2O3复合涂层的弹性恢复率高达48.3%，并且其断裂韧性及抗塑性变形的能力也最好。结论 掺杂了10%Y2O3的Al2O3-Y2O3复合涂层具有最致密的微观组织结构，其综合力学性能最好。 |
| 英文摘要: |
| The work aims to investigate the effect of doping with different mass fractions of Y2O3 on the microstructure and mechanical properties of Al2O3-Y2O3 composite coatings. To achieve this objective, Al2O3 coatings and Al2O3-Y2O3 composite coatings with Y2O3 contents of 10wt.%, 20wt.%, 30wt.%, and 40wt.% were produced on the surface of Q235 mild steel by atmospheric plasma spraying technique. The morphology, microstructure and elemental distribution of the powders and the different coatings were analyzed by SEM and EDS. The phase composition of the powders and coatings was analyzed by XRD. The mechanical properties of the coatings, such as microhardness, modulus of elasticity, and fracture toughness, were tested and analyzed with a microhardness tester, a nanoindentation tester and an electronic universal testing machine. The results showed that the phase composition of Al2O3 powder were α-Al2O3, and the Al2O3 phases in Al2O3 coating and its Al2O3-Y2O3 composite coating were composed of α-Al2O3 and γ-Al2O3. Besides, Y2O3 powder and coating were all composed of c-Y2O3, but the Y2O3 of Al2O3-Y2O3 composite coating was composed of c-Y2O3 and m-Y2O3. The addition of Y2O3 had a certain inhibitory effect on the generation of γ-Al2O3. With the increase of Y2O3 content, the insufficiently fused particles on the surface of the Al2O3-Y2O3 composite coating gradually increased, and the surface became rougher. The Al2O3 and Y2O3 phases in the composite coating showed a laminar distribution, and the combined interface of Al2O3 and Y2O3 was more dense, and the Y2O3 in the powder was well retained in the coating. The Al2O3-Y2O3 composite coating doped with 10wt.% Y2O3 had the lowest porosity and the densest coating. When the content of Y2O3 exceeded 10wt.%, the porosity increased with the increase of Y2O3 content. In terms of mechanical properties, the Al2O3 coating had the highest microhardness value (1 209HV0.3). The cross-sectional microhardness was less than the surface microhardness in all coatings. The microhardness of Al2O3-Y2O3 composite coatings gradually decreased with the increase of Y2O3 content. Among them, when the doping amount of Y2O3 in the Al2O3-Y2O3 composite coating was 10wt.%, the decrease in the microhardness value compared to the Al2O3 coating was not obvious. In the Weibull distribution image, the slope of the straight line after linear fitting of the Al2O3-10wt.% Y2O3 composite coating was the largest, indicating that the coating was the densest. The results of the nanoindentation experiments showed that the Al2O3 coating had the highest nanoindentation hardness (14.95 GPa) and elastic modulus (227 GPa). The larger the content of Y2O3 in the composite coating, the smaller the values of nanoindentation hardness and elastic modulus. The Al2O3-10wt.% Y2O3 composite coating had the best elastic recovery of 48.3% and the best resistance to plastic deformation. The results of the three-point bending experiments showed that the Al2O3-10wt.%Y2O3 composite coating had the largest stress and strain values (σ=742.56 MPa, ε=3.08%) when fracture occurred, and its fracture toughness was the best. The results showed that the Al2O3-Y2O3 composite coating doped with 10wt.% Y2O3 had the densest microstructure and the best overall mechanical properties. |
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