Application of the response surface method to optimize the chemical composition and hardness of the aluminum oxide coating created by the electrolytic plasma method

Subject Areas : journal of New Materials

Babak Ghorbanian ¹ , Mohammad Tajally ² , Mohammad Mousavi Khoie ³ , Hossein Tavakoli ⁴

1 - Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
2 - Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
3 - Faculty of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran Iran
4 - Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran

Received: 2018-09-21 Accepted : 2019-06-23 Published : 2019-06-22

Keywords: Electrolytic plasma oxidation, &alpha, -Al2O3, γ-Al2O3,

Abstract :

Electrolytic plasma oxidation (PEO) oxidation is one of the most important methods for oxidation of materials and coatings. The coatings based on aluminum in the PEO method have two α-Al2O3 and γ-Al2O3 altitudes, which have α-Al2O3 allotropic coatings that have better hardness and abrasion resistance. Therefore, the main objective of the present study is to optimize the alumina of aluminum oxide to increase the amount of α-Al2O3 in the coating produced by the PEO method. In the present study, aluminum 1050 is used as a base metal, and materials such as potassium hydroxide, sodium pyrophosphate, and sodium aluminate are used as electrolytes. To optimize the data, the RSM test design method was used with the Design Expert 7 software. The amount of potassium hydroxide, sodium pyrophosphate and sodium aluminate, independent variables of research and hardness, and the ratio of the highest peak allotropic α-Al2O3 to the highest peak γ- Al2O3 are dependent variables of the research. The results of this study show that the optimal electrolyte composition in order to produce the highest amount of α-Al2O3 phase is 2.9 g / L KOH, 1.15 g / L sodium Sodium pyrophosphate and 0.34 g / L Sodium Aluminate, which is the ratio of peak intensity α -Al2O3 (in the XRD test) on the γ-Al2O3 peak at an optimal level of 622 and a hardness of 1648 Hv.

References:

[1] Yerokhin, A. L., et al. "Plasma electrolysis for surface engineering." Surface and coatings technology 122.2-3 (1999): 73-93.

[2] Meletis, E. I., et al. "Electrolytic plasma processing for cleaning and metal-coating of steel surfaces." Surface and Coatings Technology 150.2-3 (2002): 246-256.

[3] Snizhko, L. O., et al. "Anodic processes in plasma electrolytic oxidation of aluminium in alkaline solutions." Electrochimica Acta 49.13 (2004): 2085-2095.   

[4] Krishna, L. Rama, K. R. C. Somaraju, and G. Sundararajan. "The tribological performance of ultra-hard ceramic composite coatings obtained through microarc oxidation." Surface and Coatings Technology 163 (2003): 484-490.           

[5] Sundararajan, G., and L. Rama Krishna. "Mechanisms underlying the formation of thick alumina coatings through the MAO coating technology." Surface and Coatings Technology167.2-3 (2003): 269-277.         

[6] Nie, Xie, et al. "Abrasive wear/corrosion properties and TEM analysis of Al2O3 coatings fabricated using plasma electrolysis." Surface and Coatings Technology 149.2-3 (2002): 245-251.

[7] Wang, L., and X. Nie. "Silicon effects on formation of EPO oxide coatings on aluminum alloys." Thin Solid Films 494.1-2 (2006): 211-218.         

[8] Yerokhin, Aleksey L., Viktor V. Lyubimov, and Roman V. Ashitkov. "Phase formation in ceramic coatings during plasma electrolytic oxidation of aluminium alloys." Ceramics International 24.1 (1998): 1-6.          

[9] Parfenov, E. V., et al. "Towards smart electrolytic plasma technologies: An overview of methodological approaches to process modelling." Surface and Coatings Technology 269 (2015): 2-22.     

[10] Hussein, R. O., et al. "Spectroscopic study of electrolytic plasma and discharging behaviour during the plasma electrolytic oxidation (PEO) process." Journal of Physics D: Applied Physics 43.10 (2010): 105203.        

[11] Kasalica, B., et al. "Electronic transitions during plasma electrolytic oxidation of aluminum." Surface and Coatings Technology 203.20-21 (2009): 3000-3004.

[12] Hussein, R. O., et al. "Spectroscopic study of electrolytic plasma and discharging behaviour during the plasma electrolytic oxidation (PEO) process." Journal of Physics D: Applied Physics 43.10 (2010): 105203.        

[13] Ghorbanian, B., and Mousavi Khoie. S. M., "Formation of vanadium carbide with the plasma electrolytic saturation method (PES) and comparison with Thermo Reactive diffusion method (TRD)." Acta Metallurgica Slovaca 22.2 (2016): 111-119.           

[14] Ghorbanian, B., and Mousavi Khoie, S. M.. "COMPARISON THE VANADIUM CARBIDE COATING CREATED VIA PLASMA ELECTROLYTIC SATURATION AND TERMO REACTIVE DIFFUSION." ACTA METALLURGICA SLOVACA 22.2 (2016): 111-119.       

[15] Gudyka, Sylwia, et al. "Enhancing the deN2O activity of the supported Co3O4| α-Al2O3 catalyst by glycerol-assisted shape engineering of the active phase at the nanoscale." Applied Catalysis B: Environmental 201 (2017): 339-347.         

[16] Azuaje, Jhonny, et al. "An efficient and recyclable 3D printed α-Al2O3 catalyst for the multicomponent assembly of bioactive heterocycles." Applied Catalysis A: General 530 (2017): 203-210.

[17] Schaper, H., and L. L. Van Reijen. "A quantitative investigation of the phase transformation of gamma to alpha alumina with high temperature DTA." Thermochimica acta 77.1-3 (1984): 383-393.           

[18] Han-Hua, Wu, et al. "Characterization of microarc oxidation process on aluminium alloy." Chinese physics letters 20.10 (2003): 1815.

[19] Bodaghi, M., et al. "Investigation of phase transition of γ-alumina to α-alumina via mechanical milling method." Phase Transitions 81.6 (2008): 571-580.    

[20]Khuri, André I., and Siuli Mukhopadhyay. "Response surface methodology." Wiley Interdisciplinary Reviews: Computational Statistics 2.2 (2010): 128-149.          

[21] Carley, Kathleen M., Natalia Y. Kamneva, and Jeff Reminga. Response surface methodology. No. CMU-ISRI-04-136. CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE, 2004.       

[22] Dean, Angela, Daniel Voss, and Danel Draguljić. "Response surface methodology." Design and analysis of experiments. Springer, Cham, 2017. 565-614.

[23] Gunst, Richard F. "Response surface methodology: process and product optimization using designed experiments." (1996): 284-286.          

[24] Bezerra, Marcos Almeida, et al. "Response surface methodology (RSM) as a tool for optimization in analytical chemistry." Talanta 76.5 (2008): 965-977.

[25] Kleijnen, Jack PC. "Response surface methodology." Handbook of simulation optimization. Springer, New York, NY, 2015. 81-104.       

[26] Barton, Russell R. "Response surface methodology." Encyclopedia of Operations Research and Management Science. Springer, Boston, MA, 2013. 1307-1313.

[27] تدین سعیدی، م.، و قربانیان، ب.، "کاربرد روش سطح پاسخ در بهینه سازی ضخامت و سختی پوشش وانادیم کاربید ایجاد شده به روش پلاسمای الکترولیتی." فصلنامه علمی-پژوهشی مواد نوین 9.34 (1397): 111-1200.‎

[28] Ghorbanian, B., et al. "Investigation Of The Electrolyte Effects On Formation Of Vanadium Carbide Via Plasma Electrolytic Saturation Method (Pes)." Surface Review and Letters 23.04 (2016): 1650021.