OPTIMIZING PLASMA SPRAYING PARAMETERS TO SIMULTANEOUSLY MECHANICAL PROPERTIES OF CERAMIC COATINGS OF Al 2O3-40TiO2 SYSTEM

Bui Van Khoan

Bui Van Khoan Hung Yen University of Technology and Education

Keywords: Plasma spraying, Optimization, Porosity, Hardness, Adhesion, C45 steel, Al2O3-TiO2 coating

Abstract

This paper presents the results of research on optimizing Plasma spray parameters, including current intensity (I), spray distance (L), and powder feed speed (M) to harden and porosity simultaneously, the coating adhesion strength of Al2O3-40TiO2 coating system on C45 steel plate substrate. OEC multiobjective optimization method based on Taguchi experimental design to optimize and determine spray parameters I = 600A, M = 1.9 kg/h, L = 130 mm for a coating that simultaneously meets the Smallest foam, highest hardness, highest adhesion strength is 4.24%, 585.8HV, 56.4 MPa respectively. Besides, ANOVA analysis of variance determines the influence of each research parameter on the overall OEC evaluation index as: I (96.5%) > M (2.38%) > L (1.12 %). Experimental results verifying the optimal spray parameters received have determined the reliability of the research results. The corresponding properties of the resulting coating are smaller than in the case of single-property optimization. The deviation of each case is determined with a porosity of 0.35%, hardness of 5.44%, and adhesion strength of 6.85%. However, the resulting coating meets all three properties at a high level, while the remaining criteria for the single-target coating are lower. Thus, the OEC index can be used to evaluate many coating mechanical properties simultaneously.

References

Bùi Văn Khoản, Kiều Đăng Trường, Lê Thu Quý, Lê Đăng Thắng, Ngô Văn Dũng, Nguyễn Quốc Mạnh, Nghiên cứu chế tạo lớp phun phủ plasma Al2O3-TiO2 ứng dụng để nâng cao độ bền các chi tiết máy. Tạp chí Cơ khí Việt Nam, ISSN 0866-7056, 2018, số 1+2, tr. 103-108.

Vũ Dương, Hà Minh Hùng, Nguyễn Văn Đức, Bùi Văn Khoản. Xác định độ cứng tế vi vật liệu lớp phủ plasma hệ gốm Al2O3-TiO2 trên bề mặt thép nền SS400. Tạp chí Cơ khí Việt Nam, 2022, số 1+2, tr. 25-32.

P222-32, Aluminia oxide 60%, Titanium dioxide 40%, Metallisation, 2.9.12.5.ISSUE: 1/95-12.

A. Rico, J. Rodriguez, E. Otero, P. Zeng, W.M. Rainforth, Wear behaviour of nanostructured alumina–titania coatings deposited by atmospheric plasma spray. Wear, 2009, Vol. 267, Issues 5-8, pp. 1191-1197.

V.V. Narulkar, S. Prakash, K. Chandra, Effects of temperature on tribological properties of Al2O3-TiO2 coating. Defence Science Journal, 2008, Vol. 58, No.4, pp. 582-587.

Thermal Spray Materials Guide - Aerospace materials handbook.G. Bolelli, V. Cannillo, L. Lusvarghi, T. Manfredini. Wear behaviour of thermally sprayed ceramic oxide coatings. Dipartimento di Ingegneria dei Materiali e dell’Ambiente, University a di Modena e Reggio Emilia, Via Vignolese 905, 41100 Modena, MO, Italy. 2006.

Yusoff, N. H., et al. "Characterisations Of Al2O3‐13% Wt TiO2 Deposition On Mild Steel Via Plasma Spray Method". AIP Conference Proceedings, 2011, Vol. 1315, No. 1, American Institute of Physics.

Kanta, A-F., M-P. Planche, and G. Montavon. Electrochemical characterisations of Al2O3–13%TiO2 coated by atmospheric plasma spray. Plasma Chemistry and Plasma Processing, 2011, 31.6, pp. 867-877.

Zum Gahr, K-H., W. Bundschuh, and B. Zimmerlin. “Effect of grain size on friction and sliding wear of oxide ceramics”. Wear, 1993, 162, pp. 269-279.

Tiêu chuẩn thép cacbon kết cấu chất lượng tốt, TCVN 1766 - 75, 2009.

ASTM B276-21, Standard Test Method for Apparent Porosity in Cemented Carbides.

ASTM E384-2017, Standard test method for microindentation hardness of material

JIS H8666:1980, Test methods for build-up thermal spraying.

Taguchi G, Konishi S, Taguchi Methods, orthogonal arrays and linear graphs, tools for quality American supplier institute, American Supplier Institute, 1987, pp. 8-35.