Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy
AbstractIntroduction: Electrolytic plasma oxidation coatings are one of the most important materials used to deal with the wear of aluminum parts due to their compact, sticky and hard nature. In recent years, improving the surface properties of these coatings with the help of adding reinforcement pa...
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Marvdasht Branch, Islamic Azad University
2022-10-01
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| Series: | مواد نوین |
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| Online Access: | https://jnm.marvdasht.iau.ir/article_6042_e16e34828a59c2969ebd5fe4a6816bb3.pdf |
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| author | Mohammad Razazi Boroujeni Zahraa Salah Hadi Aljassar Farhad Azimifar |
| author_facet | Mohammad Razazi Boroujeni Zahraa Salah Hadi Aljassar Farhad Azimifar |
| author_sort | Mohammad Razazi Boroujeni |
| collection | DOAJ |
| description | AbstractIntroduction: Electrolytic plasma oxidation coatings are one of the most important materials used to deal with the wear of aluminum parts due to their compact, sticky and hard nature. In recent years, improving the surface properties of these coatings with the help of adding reinforcement particles has attracted the attention of researchersMethods In this study, plasma electrolytic oxidation (PEO) process was applied in two modes, normal and composite, to coat aluminum 7075. To produce the composite coating, the same electrolyte as the normal mode was used with the addition of 12 grams per liter of silicon oxide particles. Characterization of coatings was done with the help of SEM, X-ray diffraction analysis, energy dispersive spectrometer (EDS) analysis, roughness measurement and hardness measurement. The tribological behavior of coatings was investigated with the help of pin-on-disk test and the analysis of the wear mechanism of the samples was done with the help of SEM images and EDS analysis of wear surfaces.Findings: Both coatings had a pancake structure with craters. Also, the drainage channels that lead to the porosity of the coatings were less created on the surface of the composite coating. The normal coating was an oxide coating with an amorphous/crystalline nature, but the composite coating had silicon oxide and mullite crystalline phases in addition to these two phases. The lowest weight loss (highest wear resistance) and friction coefficient were obtained for the composite coating. wear mechanism was also observed delamination wear and oxidation wear for substrate, abrasion, adhesive and oxidation wear for PEO coating, and fine scratch mechanisms and adhesive mechanism with very little effect for composite coating. |
| first_indexed | 2024-03-08T15:47:26Z |
| format | Article |
| id | doaj.art-13ab0d4ac2a649e5bef1637c7b7bead1 |
| institution | Directory Open Access Journal |
| issn | 2228-5946 2423-7183 |
| language | fas |
| last_indexed | 2024-03-08T15:47:26Z |
| publishDate | 2022-10-01 |
| publisher | Marvdasht Branch, Islamic Azad University |
| record_format | Article |
| series | مواد نوین |
| spelling | doaj.art-13ab0d4ac2a649e5bef1637c7b7bead12024-01-09T09:27:13ZfasMarvdasht Branch, Islamic Azad Universityمواد نوین2228-59462423-71832022-10-011349728510.30495/jnm.2023.31857.19956042Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloyMohammad Razazi Boroujeni0Zahraa Salah Hadi Aljassar1Farhad Azimifar2Assistant prof. of Materials Engineering, Department of Materials Engineering, Lenjan Branch, Islamic Azad University, Isfahan, Iran.MSc student of Materials Engineering, Department of Materials Engineering and Metallurgy, South Tehran Branch, Islamic Azad University, Tehran, Iran.Assistant prof., Department of Biomedical Engineering, Islamic Azad University, Isfahan branch, Isfahan, Iran.AbstractIntroduction: Electrolytic plasma oxidation coatings are one of the most important materials used to deal with the wear of aluminum parts due to their compact, sticky and hard nature. In recent years, improving the surface properties of these coatings with the help of adding reinforcement particles has attracted the attention of researchersMethods In this study, plasma electrolytic oxidation (PEO) process was applied in two modes, normal and composite, to coat aluminum 7075. To produce the composite coating, the same electrolyte as the normal mode was used with the addition of 12 grams per liter of silicon oxide particles. Characterization of coatings was done with the help of SEM, X-ray diffraction analysis, energy dispersive spectrometer (EDS) analysis, roughness measurement and hardness measurement. The tribological behavior of coatings was investigated with the help of pin-on-disk test and the analysis of the wear mechanism of the samples was done with the help of SEM images and EDS analysis of wear surfaces.Findings: Both coatings had a pancake structure with craters. Also, the drainage channels that lead to the porosity of the coatings were less created on the surface of the composite coating. The normal coating was an oxide coating with an amorphous/crystalline nature, but the composite coating had silicon oxide and mullite crystalline phases in addition to these two phases. The lowest weight loss (highest wear resistance) and friction coefficient were obtained for the composite coating. wear mechanism was also observed delamination wear and oxidation wear for substrate, abrasion, adhesive and oxidation wear for PEO coating, and fine scratch mechanisms and adhesive mechanism with very little effect for composite coating.https://jnm.marvdasht.iau.ir/article_6042_e16e34828a59c2969ebd5fe4a6816bb3.pdfcoatingplasma electrolyte oxidationcompositewearfriction |
| spellingShingle | Mohammad Razazi Boroujeni Zahraa Salah Hadi Aljassar Farhad Azimifar Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy مواد نوین coating plasma electrolyte oxidation composite wear friction |
| title | Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy |
| title_full | Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy |
| title_fullStr | Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy |
| title_full_unstemmed | Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy |
| title_short | Evaluation of tribological behavior of PEO composite coating containing SiO2 particles on 7075 aluminum alloy |
| title_sort | evaluation of tribological behavior of peo composite coating containing sio2 particles on 7075 aluminum alloy |
| topic | coating plasma electrolyte oxidation composite wear friction |
| url | https://jnm.marvdasht.iau.ir/article_6042_e16e34828a59c2969ebd5fe4a6816bb3.pdf |
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