Abstract
Abstract The fabrication of an alumina-metal composite coating onto a carbon steel substrate by using a self-propagating high-temperature synthesis technique was demonstrated. The effects of the type and thickness of the pre-coated layer on the binding structure and surface quality of the coating were systematically investigated. The macrostructure, phase composition, and bonding interface between the coating and the substrate were investigated by scanning electronic microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectrometry (EDS). The diffraction patterns indicated that the coating essentially consisted of α-Al2O3, Fe(Cr), and FeO·Al2O3. With an increase in the thickness of the pre-coated working layer, the coating became more smooth and compact. The transition layer played an important role in enhancing the binding between the coating and the substrate. When the pre-coated working layer was 10 mm and the pre-coated transition layer was 1 mm, a compact structure and metallurgical bonding with the substrate were obtained. Thermal shock test results indicated that the ceramic coating exhibited good thermal shock resistance when the sample was rapidly quenched from 800°C to room temperature by plunging into water.
Highlights
As traditional materials, carbon steels experience significant challenges in the environment, enduring wear, corrosion, and oxidation
Of the different materials used for this purpose, Al2O3 ceramic is one of the most widely used abrasive materials owing to its high corrosion resistance, excellent wear resistance, and low cost
Xue et al, Bonding characteristics of the Al2O3-metal composite coating fabricated onto carbon steel by
Summary
Carbon steels experience significant challenges in the environment, enduring wear, corrosion, and oxidation. The conventional fabrication methods have certain inherent limitations for use in different applications It has always been a challenging task to identify appropriate methods for depositing Al2O3 ceramic coatings onto carbon steel. Xue et al, Bonding characteristics of the Al2O3-metal composite coating fabricated onto carbon steel by To this end, in this study, we have made an attempt to deposit the Al2O3-metal composite coating onto the steel substrate using the SHS method under static conditions. In this study, we have made an attempt to deposit the Al2O3-metal composite coating onto the steel substrate using the SHS method under static conditions This does not demand any sophisticated equipment or stringent working conditions.
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