Original title: Boronized stainless steel with zirconia coatings
Authors: Brožek, Vlastimil ; Kolísko, J. ; Kubatík, Tomáš František ; Mastný, L. ; Pokorný, P. ; Tej, P.
Document type: Papers
Conference/Event: METAL 2015. International Conference on Metallurgy and Materials /24./, Brno (CZ), 2015-06-03 / 2015-06-05
Year: 2015
Language: eng
Abstract: Conditions of boronizing are described using a reactive diffusion method of boron from boron carbide and lanthanum hexaboride so that the formation of Fe2B is preferred to FeB which is more brittle and whose structure does not satisfy the conditions for perfect adhesion of modified zirconia ceramics. Perfectly rigid adhesive connection of needle-like embedded interlayers Fe2B in steel AISI 303 prepared by reactive diffusion of a boronizing medium without activators at 1000 ° C and exposure of 2-4 hours has the value of 20 - 24 MPa at the Pinn-off test.Ceramic coatings from Al2O3-ZrO2 ceramics formed on those interlayers have the value of bond strength up to 14 - 20 MPa.Thermal cycling between 100°C - 600 °C confirmed good adhesion of coatings with the underlying steel.During thermal cycling at elevated temperatures (600-1000 °C) there occurs a statistically significant number of faults in cohesion and mechanical destruction of the coatings. One of the reasons are secondary changes
Keywords: bond strength; Boronised steel; ceramic coatings; plasma spraying; zirkonia coatings
Host item entry: METAL 2015: 24th International Conference on Metallurgy and Materials, Conference Proceedings, ISBN 978-80-87294-62-8

Institution: Institute of Plasma Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0256741

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