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

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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Main Authors: Marzanna Ksiazek, Lukasz Boron, Adam Tchorz
Format: Article
Language:English
Published: MDPI AG 2020-09-01
Series:Materials
Subjects:
Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub> coating
HVOF process
erosion wear
Al-Si cast alloy
Online Access:https://www.mdpi.com/1996-1944/13/18/4122
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spelling doaj-4cccd194d79e45c1ae0457baaf5f4ac62020-11-25T01:53:21ZengMDPI AGMaterials1996-19442020-09-01134122412210.3390/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
collection DOAJ
language English
format Article
sources DOAJ
author Marzanna Ksiazek
Lukasz Boron
Adam Tchorz
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
author_facet Marzanna Ksiazek
Lukasz Boron
Adam Tchorz
author_sort Marzanna Ksiazek
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_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_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_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
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2020-09-01
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.
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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AT lukaszboron studyonthemicrostructuremechanicalpropertiesanderosivewearbehaviorofhvofsprayedalsub2subosub3sub15wttiosub2subcoatingwithnialinterlayeronalsicastalloy
AT adamtchorz studyonthemicrostructuremechanicalpropertiesanderosivewearbehaviorofhvofsprayedalsub2subosub3sub15wttiosub2subcoatingwithnialinterlayeronalsicastalloy
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