{"title":"添加 TiO2 纳米粒子后 AZ31B 镁合金等离子电解质氧化涂层的疏水性能、耐磨性和耐腐蚀性得到增强","authors":"Kunlong Zhang, Weihua Zhang, Yue Yang, Xiangyu Sun, Boxuan Men, Sirong Yu","doi":"10.1016/j.ceramint.2024.10.145","DOIUrl":null,"url":null,"abstract":"<div><div>Nanocomposite coatings were fabricated on AZ31B magnesium alloy by means of plasma electrolyte oxidation (PEO) with the addition of TiO<sub>2</sub> nanoparticles into the alkaline electrolyte, followed by low surface energy modification in the ethanol solution of lauric acid. The dual-layered nanocomposite PEO coatings composed of MgO, Mg<sub>2</sub>SiO<sub>4</sub>, anatase-TiO<sub>2</sub>, rutile-TiO<sub>2</sub>, and Mg<sub>2</sub>TiO<sub>4</sub> were formed, and the TiO<sub>2</sub> nanoparticles incorporated into the PEO coatings via both inertia and reactive modes. Besides, the penetration and adsorption of TiO<sub>2</sub> nanoparticles created a distribution gradient in the coating thickness direction. The wear rate of the PEO coatings with TiO<sub>2</sub> nanoparticles in 4 g/L was approximately 82 % lower than that of the bare substrate and approximately 39 % lower than that of the PEO coatings without TiO<sub>2</sub> addition, respectively. The enhancement in wear resistance was due to the synergistic effect of the lower coefficient of friction (COF), the higher microhardness and the denser microstructure with finer micropores and less microcracks on the coatings than that of the TiO<sub>2</sub>-free coatings. Besides, the hydrophobic property was enhanced for the low surface energy modified PEO coatings with the addition of TiO<sub>2</sub> nanoparticles in the electrolyte. Moreover, a significant enhancement in the corrosion resistance was achieved for the PEO coating with the addition of TiO<sub>2</sub> nanoparticles in 4 g/L. It exhibited a higher corrosion inhibition efficiency and a lower corrosion rate than that in other concentrations and without TiO<sub>2</sub> addition. The improvement in anti-corrosion property was originated from the formation of phases including TiO<sub>2</sub> and Mg<sub>2</sub>TiO<sub>4</sub> in the coating, and denser microstructure with better hydrophobic properties for the PEO coatings with TiO<sub>2</sub> nanoparticles in 4 g/L compared with that in other concentrations. Accordingly, the hydrophobic, wear-resistant and corrosion-resistant PEO coatings with TiO<sub>2</sub> nanoparticles exhibited significant advantages in the field of Mg alloys protection.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 24","pages":"Pages 52941-52956"},"PeriodicalIF":5.6000,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced hydrophobic properties, wear and corrosion resistance of plasma electrolyte oxidation coatings on AZ31B magnesium alloys with addition of TiO2 nanoparticles\",\"authors\":\"Kunlong Zhang, Weihua Zhang, Yue Yang, Xiangyu Sun, Boxuan Men, Sirong Yu\",\"doi\":\"10.1016/j.ceramint.2024.10.145\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Nanocomposite coatings were fabricated on AZ31B magnesium alloy by means of plasma electrolyte oxidation (PEO) with the addition of TiO<sub>2</sub> nanoparticles into the alkaline electrolyte, followed by low surface energy modification in the ethanol solution of lauric acid. The dual-layered nanocomposite PEO coatings composed of MgO, Mg<sub>2</sub>SiO<sub>4</sub>, anatase-TiO<sub>2</sub>, rutile-TiO<sub>2</sub>, and Mg<sub>2</sub>TiO<sub>4</sub> were formed, and the TiO<sub>2</sub> nanoparticles incorporated into the PEO coatings via both inertia and reactive modes. Besides, the penetration and adsorption of TiO<sub>2</sub> nanoparticles created a distribution gradient in the coating thickness direction. The wear rate of the PEO coatings with TiO<sub>2</sub> nanoparticles in 4 g/L was approximately 82 % lower than that of the bare substrate and approximately 39 % lower than that of the PEO coatings without TiO<sub>2</sub> addition, respectively. The enhancement in wear resistance was due to the synergistic effect of the lower coefficient of friction (COF), the higher microhardness and the denser microstructure with finer micropores and less microcracks on the coatings than that of the TiO<sub>2</sub>-free coatings. Besides, the hydrophobic property was enhanced for the low surface energy modified PEO coatings with the addition of TiO<sub>2</sub> nanoparticles in the electrolyte. Moreover, a significant enhancement in the corrosion resistance was achieved for the PEO coating with the addition of TiO<sub>2</sub> nanoparticles in 4 g/L. It exhibited a higher corrosion inhibition efficiency and a lower corrosion rate than that in other concentrations and without TiO<sub>2</sub> addition. The improvement in anti-corrosion property was originated from the formation of phases including TiO<sub>2</sub> and Mg<sub>2</sub>TiO<sub>4</sub> in the coating, and denser microstructure with better hydrophobic properties for the PEO coatings with TiO<sub>2</sub> nanoparticles in 4 g/L compared with that in other concentrations. Accordingly, the hydrophobic, wear-resistant and corrosion-resistant PEO coatings with TiO<sub>2</sub> nanoparticles exhibited significant advantages in the field of Mg alloys protection.</div></div>\",\"PeriodicalId\":267,\"journal\":{\"name\":\"Ceramics International\",\"volume\":\"50 24\",\"pages\":\"Pages 52941-52956\"},\"PeriodicalIF\":5.6000,\"publicationDate\":\"2024-12-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramics International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0272884224046534\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/10/11 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884224046534","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/10/11 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Enhanced hydrophobic properties, wear and corrosion resistance of plasma electrolyte oxidation coatings on AZ31B magnesium alloys with addition of TiO2 nanoparticles
Nanocomposite coatings were fabricated on AZ31B magnesium alloy by means of plasma electrolyte oxidation (PEO) with the addition of TiO2 nanoparticles into the alkaline electrolyte, followed by low surface energy modification in the ethanol solution of lauric acid. The dual-layered nanocomposite PEO coatings composed of MgO, Mg2SiO4, anatase-TiO2, rutile-TiO2, and Mg2TiO4 were formed, and the TiO2 nanoparticles incorporated into the PEO coatings via both inertia and reactive modes. Besides, the penetration and adsorption of TiO2 nanoparticles created a distribution gradient in the coating thickness direction. The wear rate of the PEO coatings with TiO2 nanoparticles in 4 g/L was approximately 82 % lower than that of the bare substrate and approximately 39 % lower than that of the PEO coatings without TiO2 addition, respectively. The enhancement in wear resistance was due to the synergistic effect of the lower coefficient of friction (COF), the higher microhardness and the denser microstructure with finer micropores and less microcracks on the coatings than that of the TiO2-free coatings. Besides, the hydrophobic property was enhanced for the low surface energy modified PEO coatings with the addition of TiO2 nanoparticles in the electrolyte. Moreover, a significant enhancement in the corrosion resistance was achieved for the PEO coating with the addition of TiO2 nanoparticles in 4 g/L. It exhibited a higher corrosion inhibition efficiency and a lower corrosion rate than that in other concentrations and without TiO2 addition. The improvement in anti-corrosion property was originated from the formation of phases including TiO2 and Mg2TiO4 in the coating, and denser microstructure with better hydrophobic properties for the PEO coatings with TiO2 nanoparticles in 4 g/L compared with that in other concentrations. Accordingly, the hydrophobic, wear-resistant and corrosion-resistant PEO coatings with TiO2 nanoparticles exhibited significant advantages in the field of Mg alloys protection.
期刊介绍：
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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