The investigation of the microstructure behavior of the spray distances and argon gas flow rates effects on the aluminum coating using self-generated atmospheric plasma spray system
Publish Year: 1396
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JTAP-11-3_008
تاریخ نمایه سازی: 27 مرداد 1397
Abstract:
In the present paper, our aims are the investigationof the effects of the spray parameters of the aluminum-coated layer on the microstructure and mechanicalproperties. For this purpose, we use the self-generatedatmospheric plasma spray system for coating of aluminumon the carbon steel substrate to protect it against corrosiondegradation. This system allows us to achieve the bestchoice for parameters. In this paper, the effects of spraydistance and argon flow rate on the characteristics of aluminumcoating are investigated. To obtain the results, theanalyses are used such as X-ray diffraction, scanningelectron microscope, micro hardness of the coating byVickers method, and adhesion strength behaviors by pullofftest. The results show that the porosity increases withincreasing distance. This phenomenon reduces the hardnessand adhesion, which is clearly evident in our results. Theother important conclusion is that, if the gas flow rateincreases, the porosity decreases. It is shown that the bestadhesion strength is obtained at the special value of thespraying distance.
Keywords:
Thermal plasma spray Porosity Micro hardness Adhesion strength
Authors
Sh Khandanjou
Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran
M Ghorammeviss
Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran
Sh Saviz
Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, Tehran, Iran