| Abstract |
| A numerical and experimental study on the coating process was executed in order to know how to tailor process conditions to produce fully-amorphic metal coating by plasma spraying. As a calculation result, the cooling rate during deposition stage of plasma spraying after collision of in-flight molten powders onto substrate was higher by 5000 times than that of gas atomization. For this reason, it could be understood that nearly full amorphous coatings of Fe based alloys were formed via plasma spraying even though when partially crystallized powders were used. However crystallization of plasma-sprayed Ni-Zr alloy in air surrounding was unavoidable, which has been coated using fully-amorphic powder. This is because amorphization of Ni-Zr alloy is highly dependent on oxygen contents of process surrounding, that was certificated by producing nearly fully-amorphous coating by reducing oxygen contents in surrounding during plasma spraying. |
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| Key Words |
| Plasma spray coating Numerical analysis, Smorphous metallic coating, Gas atomization, Controlled atmosphere |
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