| Abstract: |
Thermal spraying is an industrial applicable coating technology for fabrication of thick coatings with several advantages. It is characterized with the spraying technique diversity (plasma, Arc, flame, cold spray, warm spray, aerosol deposition) and spraying materials diversity (metals, ceramics, intermetallic compounds, plastics and their composites). However, deposition of aluminum nitride (AlN) ceramic coatings in thermal spray was difficult. It is attributed to the AlN particles decomposition in the high temperature during spraying. By using the reactivity of the plasma during spray, it was possible to fabricate AlN plasma sprayed coatings through the in-situ reaction and deposition of molten feedstock materials like aluminum and alumina. The reactive plasma spray process strongly affected by the reaction related parameters, which affect the particle in-flight behavior, reaction and deposition. This study will show the influence of particle in-flight characteristics on the reactive plasma spray process, coating formation and properties.
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