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- W2280212144 abstract "The paper presents the results of experiments relating to further development of the coating processes, based on utilizing the electric arc thermal plasma jets under water. Water is supposed to be a medium providing unique conditions for plasma behavior, that can be used for new materials processing. There are several issues under investigation: the plasma jet gas dynamics under water, the heat flow from the jet into the substrate, the processes of coatings by underwater plasma spraying and chemical vapor deposition. It is found that the local pressure in the plasma jet under water is under great influence of water column pressure. It directly reduces the plasma velocity, but increases its density. The plasma flow under water should be regarded like a channel with practically total absence of the ambient medium ejection in it. The heat flow from the jet to a plasma spot on the substrate reaches 20--30% of plasma power and concentrates in a spot with 12--17 mm diameter. This allows one to fuse the coating surface layer during spraying or to process the coatings from solid, not fused particles even in the case of refractory materials spraying. The examples are presented for underwater plasma spraying of themore » low oxidized coatings from metallic titanium, hard thick coatings from titanium carbide, the coatings from partially stabilized zirconia with fused surface layer as well as underwater plasma chemical vapor deposition of diamond coatings.« less" @default.
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- W2280212144 date "1994-12-31" @default.
- W2280212144 modified "2023-09-26" @default.
- W2280212144 title "Underwater plasma spraying and synthesis of coatings" @default.
- W2280212144 hasPublicationYear "1994" @default.
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