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Structural analysis of Fe48Cr28Ni16Mo4,5Si1,5C1,75 thermally-sprayed coatings on AZ91 magnesium alloy
Kobzinková, Eliška ; Doskočil, Leoš (referee) ; Buchtík, Martin (advisor)
The bachelor thesis deals with the analysis of thermally sprayed Fe48Cr28Ni16Mo4,5Si1,5C1,75 coatings on AZ91 magnesium alloy and evaluation of their structural and mechanical properties. The theoretical part deals with magnesium alloys, focusing on AZ91 alloy, thermal spray methods, specifically the High Velocity Oxygen Fuel method of depositing (HVOF), and Fe and Fe-Cr-Ni based materials. The theoretical part concludes with a review of current research in the field of Fe-based coatings deposited by the HVOF method. The experimental part is devoted to the structural analysis of AZ91 magnesium alloy and the Fe-based thermally sprayed coating deposited on this alloy. The microstructure was analyzed by light microscopy (LM) and scanning electron microscopy (SEM). Elemental and phase analysis was performed using energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The hardness of the coating and alloy was measured by the Vickers method. The application of thermally sprayed coating increased the surface hardness from 87 ± 10 HV0.3 (AZ91) to 536 ± 94 HV0.3.
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Structural analysis of Fe48Cr28Ni16Mo4,5Si1,5C1,75 thermally-sprayed coatings on AZ91 magnesium alloy
Kobzinková, Eliška ; Doskočil, Leoš (referee) ; Buchtík, Martin (advisor)
The bachelor thesis deals with the analysis of thermally sprayed Fe48Cr28Ni16Mo4,5Si1,5C1,75 coatings on AZ91 magnesium alloy and evaluation of their structural and mechanical properties. The theoretical part deals with magnesium alloys, focusing on AZ91 alloy, thermal spray methods, specifically the High Velocity Oxygen Fuel method of depositing (HVOF), and Fe and Fe-Cr-Ni based materials. The theoretical part concludes with a review of current research in the field of Fe-based coatings deposited by the HVOF method. The experimental part is devoted to the structural analysis of AZ91 magnesium alloy and the Fe-based thermally sprayed coating deposited on this alloy. The microstructure was analyzed by light microscopy (LM) and scanning electron microscopy (SEM). Elemental and phase analysis was performed using energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The hardness of the coating and alloy was measured by the Vickers method. The application of thermally sprayed coating increased the surface hardness from 87 ± 10 HV0.3 (AZ91) to 536 ± 94 HV0.3.
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