Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process
In plasma sprayed nanostructured composite coatings with ceramic matrix, the feedstock must consist of nanoparticles of appropriate specifications. In this research, the procedure for production of Cr2O3-Ag agglomerated nanostructured composite powder to produce comosite coatings has been investigat...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Isfahan University of Technology
2013-12-01
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| Series: | Journal of Advanced Materials in Engineering |
| Subjects: | |
| Online Access: | http://jame.iut.ac.ir/article-1-563-en.html |
| _version_ | 1818668369113513984 |
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| author | E. Sadri F. Ashrafizadeh M. Ramazani |
| author_facet | E. Sadri F. Ashrafizadeh M. Ramazani |
| author_sort | E. Sadri |
| collection | DOAJ |
| description | In plasma sprayed nanostructured composite coatings with ceramic matrix, the feedstock must consist of nanoparticles of appropriate specifications. In this research, the procedure for production of Cr2O3-Ag agglomerated nanostructured composite powder to produce comosite coatings has been investigated. Nanopowders of Cr2O3 with 0, 2, 5, and 10 volume percentages of silver were dispersed to obtain a homogeneous aqueous dispersion appropriate for spray drying process. In the second stage, Cr2O3-Ag composite powders were produced by agglomeration process. The nanostructured composite powders were, then, used in the atmospheric plasma spray (APS) process to deposit a series of composite coatings for evaluation. The composite powders, with a granulated morphology, had uniform distribution of silver in a ceramic matrix and the coatings were composed of nanoparticles and particles of nano-sized crystallites. Experimental results indicated that presence of nanoparticle zones within the microstructure led to non-uniform porosities formed between splats and these zones. Furthermore, use of nanopowders in the feedstock caused a reduction in lamellae thickness of plasma sprayed coatings. |
| first_indexed | 2024-12-17T06:35:13Z |
| format | Article |
| id | doaj.art-d2fc201aec8f4273a2d22f5ef860c08e |
| institution | Directory Open Access Journal |
| issn | 2251-600X 2423-5733 |
| language | fas |
| last_indexed | 2024-12-17T06:35:13Z |
| publishDate | 2013-12-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Advanced Materials in Engineering |
| spelling | doaj.art-d2fc201aec8f4273a2d22f5ef860c08e2022-12-21T22:00:02ZfasIsfahan University of TechnologyJournal of Advanced Materials in Engineering2251-600X2423-57332013-12-01322101115Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying processE. Sadri0F. Ashrafizadeh1M. Ramazani2 Department of Materials Engineering, Isfahan University of Technology, Department of Materials Engineering, Isfahan University of Technology, Department of Materials Engineering, Isfahan University of Technology, In plasma sprayed nanostructured composite coatings with ceramic matrix, the feedstock must consist of nanoparticles of appropriate specifications. In this research, the procedure for production of Cr2O3-Ag agglomerated nanostructured composite powder to produce comosite coatings has been investigated. Nanopowders of Cr2O3 with 0, 2, 5, and 10 volume percentages of silver were dispersed to obtain a homogeneous aqueous dispersion appropriate for spray drying process. In the second stage, Cr2O3-Ag composite powders were produced by agglomeration process. The nanostructured composite powders were, then, used in the atmospheric plasma spray (APS) process to deposit a series of composite coatings for evaluation. The composite powders, with a granulated morphology, had uniform distribution of silver in a ceramic matrix and the coatings were composed of nanoparticles and particles of nano-sized crystallites. Experimental results indicated that presence of nanoparticle zones within the microstructure led to non-uniform porosities formed between splats and these zones. Furthermore, use of nanopowders in the feedstock caused a reduction in lamellae thickness of plasma sprayed coatings.http://jame.iut.ac.ir/article-1-563-en.htmlcr2o3-agcomposite powderspray dryingnanostructureplasma spraying |
| spellingShingle | E. Sadri F. Ashrafizadeh M. Ramazani Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process Journal of Advanced Materials in Engineering cr2o3-ag composite powder spray drying nanostructure plasma spraying |
| title | Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process |
| title_full | Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process |
| title_fullStr | Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process |
| title_full_unstemmed | Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process |
| title_short | Production and characterization of Cr2O3-Ag nanostructured composite powders in plasma spraying process |
| title_sort | production and characterization of cr2o3 ag nanostructured composite powders in plasma spraying process |
| topic | cr2o3-ag composite powder spray drying nanostructure plasma spraying |
| url | http://jame.iut.ac.ir/article-1-563-en.html |
| work_keys_str_mv | AT esadri productionandcharacterizationofcr2o3agnanostructuredcompositepowdersinplasmasprayingprocess AT fashrafizadeh productionandcharacterizationofcr2o3agnanostructuredcompositepowdersinplasmasprayingprocess AT mramazani productionandcharacterizationofcr2o3agnanostructuredcompositepowdersinplasmasprayingprocess |