Investigation of the Scanning Microarc Oxidation Process
Scanning microarc oxidation (SMAO) is a coating process which is based on conventional microarc oxidation (MAO). The key difference is that deposition in SMAO is achieved by using a stainless steel nozzle to spray an electrolyte stream on the substrate surface as opposed to immersing the workpiece i...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2017/2416821 |
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| author | Lingqin Xia Jianmin Han Joseph P. Domblesky Zhiyong Yang Weijing Li |
| author_facet | Lingqin Xia Jianmin Han Joseph P. Domblesky Zhiyong Yang Weijing Li |
| author_sort | Lingqin Xia |
| collection | DOAJ |
| description | Scanning microarc oxidation (SMAO) is a coating process which is based on conventional microarc oxidation (MAO). The key difference is that deposition in SMAO is achieved by using a stainless steel nozzle to spray an electrolyte stream on the substrate surface as opposed to immersing the workpiece in an electrolyzer. In the present study, SMAO discharge characteristics, coating morphology, and properties are analyzed and compared to results obtained from MAO under similar conditions. Results show that MAO and SMAO have comparable spark and microarc lifetimes and sizes, though significant differences in incubation time and discharge distribution were evident. Results also showed that the voltage and current density for MAO and SMAO demonstrate similar behavior but have markedly different transient and steady-state values. Results obtained from coating A356 aluminum sheet show that oxide thickness and growth rate in SMAO are strongly dependent on interelectrode spacing and travel speed. Analysis of the SMAO coating morphology and structure showed that a denser and slightly harder layer was deposited in comparison to MAO and is attributed to reduced porosity and increased formation of α-Al2O3. Preliminary results indicate that SMAO represents a viable process for coating of aluminum surfaces. |
| format | Article |
| id | doaj-art-0a5ec769488d4ec78afe435b34579ed5 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-0a5ec769488d4ec78afe435b34579ed52025-02-03T05:53:31ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/24168212416821Investigation of the Scanning Microarc Oxidation ProcessLingqin Xia0Jianmin Han1Joseph P. Domblesky2Zhiyong Yang3Weijing Li4School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaMechanical Engineering Department, Marquette University, 1515 West Wisconsin Avenue, Milwaukee, WI 53201 1881, USASchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaScanning microarc oxidation (SMAO) is a coating process which is based on conventional microarc oxidation (MAO). The key difference is that deposition in SMAO is achieved by using a stainless steel nozzle to spray an electrolyte stream on the substrate surface as opposed to immersing the workpiece in an electrolyzer. In the present study, SMAO discharge characteristics, coating morphology, and properties are analyzed and compared to results obtained from MAO under similar conditions. Results show that MAO and SMAO have comparable spark and microarc lifetimes and sizes, though significant differences in incubation time and discharge distribution were evident. Results also showed that the voltage and current density for MAO and SMAO demonstrate similar behavior but have markedly different transient and steady-state values. Results obtained from coating A356 aluminum sheet show that oxide thickness and growth rate in SMAO are strongly dependent on interelectrode spacing and travel speed. Analysis of the SMAO coating morphology and structure showed that a denser and slightly harder layer was deposited in comparison to MAO and is attributed to reduced porosity and increased formation of α-Al2O3. Preliminary results indicate that SMAO represents a viable process for coating of aluminum surfaces.http://dx.doi.org/10.1155/2017/2416821 |
| spellingShingle | Lingqin Xia Jianmin Han Joseph P. Domblesky Zhiyong Yang Weijing Li Investigation of the Scanning Microarc Oxidation Process Advances in Materials Science and Engineering |
| title | Investigation of the Scanning Microarc Oxidation Process |
| title_full | Investigation of the Scanning Microarc Oxidation Process |
| title_fullStr | Investigation of the Scanning Microarc Oxidation Process |
| title_full_unstemmed | Investigation of the Scanning Microarc Oxidation Process |
| title_short | Investigation of the Scanning Microarc Oxidation Process |
| title_sort | investigation of the scanning microarc oxidation process |
| url | http://dx.doi.org/10.1155/2017/2416821 |
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