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Antibacterial characteristics of thermal plasma spray system
- Source :
- Journal of X-Ray Science and Technology. 26:509-521
- Publication Year :
- 2018
- Publisher :
- IOS Press, 2018.
-
Abstract
- The objective of this study is to investigate antibacterial characteristics of a thermal plasma spray system. For this purpose, copper powder was coated on a handmade atmospheric plasma spraying system made by the stainless steel 316 substrate, which is preheated at different temperatures before spraying. A number of deposition characteristics such as antibacterial characteristics, adhesion strength and hardness of coating, was investigated. All of the spray parameters are fixed except the substrate temperature. The chemical composition was analyzed by X-ray diffraction (XRD). A scanning electron microscopy (SEM) and back scattering electron microscopy (BSE) were used to show the coating microstructure, its thickness and also the powder micrograph. The energy dispersive X-ray spectroscopy (EDX) was used to analyze the coating particles. Hardness of the deposition was examined by Vickers tester (HV0.1). Its adhesion strength was declared by cross cut tester (TQC). In addition, the percentage of bactericidal coating was evidenced with Staphylococcus aurous and Escherichia coli bacteria. Study results show that as the substrates temperature increases, the number of splats in the shape of pancake increases, the greatness and percentage of the deposition porosity both decrease. The increment of the substrate temperature leads to more oxidation and makes thicker dendrites on the splat. The enhancement of the substrate temperature also enlarges thickness and efficiency of coating. The interesting results are that antibacterial properties of coatings against the Escherichia coli are more than Staphylococcus aurous bacteria. However the bactericidal percentage of the coatings against Staphylococcus aurous and Escherichia coli bacteria roughly does not change with increasing the substrate temperature. Furthermore, by increment of the substrate temperature, coatings with both high adhesion and hardness are obtained. Accordingly, the temperature of substrate can be an important parameter for progressing mechanical properties of the antiseptic deposition.
- Subjects :
- Staphylococcus aureus
Materials science
Plasma Gases
Scanning electron microscope
chemistry.chemical_element
Atmospheric-pressure plasma
02 engineering and technology
engineering.material
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
X-Ray Diffraction
Coating
Materials Testing
Escherichia coli
Deposition (phase transition)
Radiology, Nuclear Medicine and imaging
Electrical and Electronic Engineering
Composite material
Thermal spraying
Porosity
Instrumentation
Radiation
Temperature
Substrate (chemistry)
Stainless Steel
021001 nanoscience & nanotechnology
Condensed Matter Physics
Copper
Anti-Bacterial Agents
Microscopy, Electron
chemistry
engineering
0210 nano-technology
Subjects
Details
- ISSN :
- 10959114 and 08953996
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Journal of X-Ray Science and Technology
- Accession number :
- edsair.doi.dedup.....27880d5fd4210cf6325aacb53a272edc