Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy
Alumina oxide coatings are widely used in many industrial applications to improve corrosion protection, wear and erosion resistances, and thermal insulation of metallic surfaces. The paper presents study of the microstructure, mechanical, and wear properties of HVOF (high velocity oxy-fuel process)...
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MDPI AG
2020-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/18/4122 |
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| author | Marzanna Ksiazek Lukasz Boron Adam Tchorz |
| author_facet | Marzanna Ksiazek Lukasz Boron Adam Tchorz |
| author_sort | Marzanna Ksiazek |
| collection | DOAJ |
| description | Alumina oxide coatings are widely used in many industrial applications to improve corrosion protection, wear and erosion resistances, and thermal insulation of metallic surfaces. The paper presents study of the microstructure, mechanical, and wear properties of HVOF (high velocity oxy-fuel process) sprayed of Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub> coating with the NiAl interlayer on the surface of Al-Si alloy castings. The microstructure of Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub>/NiAl coating was characterized by light microscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS). The analysis of the microstructure showed the formation of coating with low porosity, compact structure, good adhesion to the substrate with typical lamellar structure composed of a solid phase consisting of compounds included in the coating material and their phase variations. For analysis of the adhesion of coatings to the substrate, the scratch test was applied. An assessment of the erosive wear resistance of coatings was also carried out, confirming the significant impact of the interlayer as well as the microstructure and phase composition of the oxide coating on the wear resistance of the tested coating system. Moreover, the results were discussed in relation to the bending strength test, including cracks and delamination in the system of the Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub>/NiAl/Al-Si alloy as microhardness and erosion resistance of the coating. It was found that the introduction of the NiAl metallic interlayer significantly increased resistance to cracking and wear behavior in the studied system. |
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| format | Article |
| id | doaj.art-4cccd194d79e45c1ae0457baaf5f4ac6 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T16:16:50Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-4cccd194d79e45c1ae0457baaf5f4ac62023-11-20T13:59:27ZengMDPI AGMaterials1996-19442020-09-011318412210.3390/ma13184122Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast AlloyMarzanna Ksiazek0Lukasz Boron1Adam Tchorz2Department of Non-Ferrous Metals, AGH University of Science and Technology, 30 Mickiewicza Ave., 30-059 Cracow, PolandŁukasiewicz Research Network-Cracow Technology Institute, 73 Zakopianska St., 30-418 Cracow, PolandŁukasiewicz Research Network-Cracow Technology Institute, 73 Zakopianska St., 30-418 Cracow, PolandAlumina oxide coatings are widely used in many industrial applications to improve corrosion protection, wear and erosion resistances, and thermal insulation of metallic surfaces. The paper presents study of the microstructure, mechanical, and wear properties of HVOF (high velocity oxy-fuel process) sprayed of Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub> coating with the NiAl interlayer on the surface of Al-Si alloy castings. The microstructure of Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub>/NiAl coating was characterized by light microscopy, X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDS). The analysis of the microstructure showed the formation of coating with low porosity, compact structure, good adhesion to the substrate with typical lamellar structure composed of a solid phase consisting of compounds included in the coating material and their phase variations. For analysis of the adhesion of coatings to the substrate, the scratch test was applied. An assessment of the erosive wear resistance of coatings was also carried out, confirming the significant impact of the interlayer as well as the microstructure and phase composition of the oxide coating on the wear resistance of the tested coating system. Moreover, the results were discussed in relation to the bending strength test, including cracks and delamination in the system of the Al<sub>2</sub>O<sub>3</sub>-15 wt.% TiO<sub>2</sub>/NiAl/Al-Si alloy as microhardness and erosion resistance of the coating. It was found that the introduction of the NiAl metallic interlayer significantly increased resistance to cracking and wear behavior in the studied system.https://www.mdpi.com/1996-1944/13/18/4122Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coatingHVOF processerosion wearAl-Si cast alloy |
| spellingShingle | Marzanna Ksiazek Lukasz Boron Adam Tchorz Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy Materials Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coating HVOF process erosion wear Al-Si cast alloy |
| title | Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy |
| title_full | Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy |
| title_fullStr | Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy |
| title_full_unstemmed | Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy |
| title_short | Study on the Microstructure, Mechanical Properties, and Erosive Wear Behavior of HVOF Sprayed Al<sub>2</sub>O<sub>3</sub>-15 wt.%TiO<sub>2</sub> Coating with NiAl Interlayer on Al-Si Cast Alloy |
| title_sort | study on the microstructure mechanical properties and erosive wear behavior of hvof sprayed al sub 2 sub o sub 3 sub 15 wt tio sub 2 sub coating with nial interlayer on al si cast alloy |
| topic | Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coating HVOF process erosion wear Al-Si cast alloy |
| url | https://www.mdpi.com/1996-1944/13/18/4122 |
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