Optimization of plasma spray parameters on the mechanical properties of agglomerated Al2O3–13%TiO2 coated mild steel |
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| Affiliation: | 1. Maritime Technology Division, Science and Technology Research Institute for Defense (STRIDE), c/o KD MALAYA, 32100 Pangkalan TLDM, Lumut, Perak, Malaysia;2. Dept. of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, National University of Malaysia (UKM), 43600 UKM, Bangi, Selangor, Malaysia;3. School of Applied Physics, Faculty of Science & Technology, National University of Malaysia (UKM), 43600 UKM, Bangi, Selangor, Malaysia;1. School of Chemistry Science and Engineering, Yunnan University, No. 2, Green Lake North Road, Kunming 650091, Yunnan, China;2. School of Chemistry and Chemical Engineering, Qujing Normal University, Qujing 655000, Yunnan, China;1. Radiation Laboratory, Institute of Industrial Ecology, UB RAS, Ekaterinburg, Russia;2. Department of Experimental Physics, Ural Federal University, Ekaterinburg, Russia;1. Department of Materials Science and Engineering, MingDao University, Chang Hua 52345, Taiwan, ROC;2. Department of Electronic Engineering, Chung Yuan Christian University, Chung Li 32023, Taiwan, ROC;1. Department of Mathematics and Physics, Chongqing University of Science and Technology , Chongqing 401331, PR China;2. College of Sciences, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China;3. Department of Material Science , Sichuan University, Chengdu 610064, PR China;4. International Centre for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, PR China;5. Department of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, PR China;1. Electron Microscope Unit, University of the Western Cape, Robert Sobukwe Drive, Bellville 7535, South Africa;2. Physics Department, University of the Western Cape, Robert Sobukwe Drive, Bellville 7535, South Africa |
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| Abstract: | This paper discusses the effect of plasma spray parameters of deposited agglomerated nano Al2O3-13%TiO2 powders on commercial marine-grade mild steels. Prior to the coating work, the nanopowders were subjected to a two-level factorial design of experiment to optimize the operational spray parameters, namely, the primary gas pressure, the carrier gas pressure, and the powder feed rate. These operational spray parameters potentially affect the following responses of the coatings: microhardness, wear rate, and surface roughness. The significant effect on surface roughness is due to the interaction factor with the carrier gas pressure. However, by changing the carrier gas pressure and the powder feed rate, an insignificant effect on the microhardness and wear rate is noted. In general, agglomerated Al2O3-13%TiO2 nanopowder-coated steels, with the lowest primary pressure of 40 psi, carrier gas pressure of 20 psi, and the highest powder feed rate of 3 rpm, are most preferred. |
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