The effects of TiO2 sol concentration on single- and multiple-scratch damage in electroplated Ni–B-TiO2 sol composite coating
Autor: | S. Vesco, Khaled Elleuch, Mouna Kallel, Massimiliano Barletta, Mouna Masseoud |
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Přispěvatelé: | Kallel, M., Masseoud, M., Vesco, S., Barletta, M., Elleuch, K. |
Rok vydání: | 2020 |
Předmět: |
sol
Materials science Composite number 02 engineering and technology engineering.material 01 natural sciences Failure mechanism Mineral crushing operation Scratch response TiO2 sol Corrosion Coating TiO Plating 0103 physical sciences Materials Chemistry Composite material Electroplating computer.programming_language 010302 applied physics Process Chemistry and Technology Adhesion Tribology 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Scratch Settore ING-IND/16 - Tecnologie e Sistemi di Lavorazione Ceramics and Composites engineering 0210 nano-technology computer |
Zdroj: | Ceramics International. 46:3767-3776 |
ISSN: | 0272-8842 |
DOI: | 10.1016/j.ceramint.2019.10.099 |
Popis: | The electrodeposited sol-enhanced Ni–B–TiO2 composite coatings were elaborated using a novel electroplating process. This coating was assessed in terms of tribological behavior and corrosion resistance. However, the adhesion strength of this coating has not been discussed so far. The aim of this study is to evaluate the adhesion behavior of this coating, considering different TiO2 sol concentration in the plating solution in order to predict its effectiveness and its sustainability when used in mineral crushing process. A progressive load scratch test and multi-pass scratch test were performed on coatings. The morphology of scratched surfaces was analyzed to identify the scratch failure mechanism. The results indicate that the addition of TiO2 sol significantly enhanced the deposit adhesion to the substrate compared to pure Ni–B coating. No spallation failure was observed on the sol-enhanced coatings after progressive load scratch test, contrary to Ni–B coating. Moreover, the multi-pass scratch test demonstrated that the improvement in adhesion strength depends strongly on the quantity of the TiO2 sol added to the plating solution. For the optimal concentration of TiO2 sol (25 ml/L), the sol-enhanced Ni–B–TiO2sol composite coating boasts the best adhesion strength. However, further increase in TiO2 sol concentration results in a deterioration of coating adhesion. |
Databáze: | OpenAIRE |
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